Silicon Chip 2005 №10

["POSITIO]I UAGA]IT f^|4.Iaf WAS \u00edIME fA DISABL\u00c9 We seek an experienced electronics enthusiast to Rsof\u00c9fa?c-f\u00c8tYo{-scft\u20acR?c u tf\u20ac Y join Laservision's dynamic research and develop- ment team creating advanced solutions for the international entertainment and communications industries. Skills in computers, software and electronics re- quired. Contact Michelle Osmetti for an information kit: michelleos @ laserv\u00a1s\u00a1on.com.au laserYision.cotn.au that were closing the set down. When the set came on, I llEW lleldwere Addili0ns llEW Firmware Add\u00a1ti0ns managed to check that the main power rail at TPE1 was . FunctionLED . Single l\/0 pin commands +125Y but couldn't conflrm that the set subsequently . opt\u00a1onsPowering . SPI interface (available on all ports.) switched off because it might have intermittently gone . l\\\\lodeSelf Powlred . Temperature interface to a DS18B20 high. However, I did confirm that there was +325V com- . ModeBus Powered . (available 0n all l\/0 pins) ing out of the main bridge rectifier [D806) - ie, across LED Function CBO9. i$-rili$'E LLs svnrrs opl#H\u00dfuT RELAv ourpuT igltc^If\\\"qsJ\\\"g It was time to disable the protection circuitry step- uuA\u00f1u by-step until the set stayed on. This can be a bit dodgy if there is a real fault on that line, because it will now ndall, Ql\u00a1t 42\/,rl b have the opportunity to really destroy other parts with- w,\u20aclexol.com w.elexol.com 3 out hindrance, The entire protection circuit can be switched off by OcroBEn 2oo5 49 disconnectingDB23 on the primary hot side which feeds Q827. This told me that the set itself was OK, because the picture and sound were rock steady and there was no sign of any strain. This meant that it was highly \u00ecikely that the protection circuits themselves were faulty. Next, I resoldered D823, then moved to the cold side of the supply and shorted QB05's base to ground (emit- ter). This too allowed the set to switch on and function reliably. One of the most common faults in this set is dry joints on the vertical output IC (IC451, LA7B3B). If this fault is allowed to fester, it will eventually destroy the IC and cause too much current to be drawn from the 24Y ruil, This is detected by Q454 which in turn switches on Q805, However, this wasn't the case with Mr Moss's set. Gradually, I disab\u00cced each of the protection feeder circuits until at last I found that disconnecting DB32 allowed the set to function. This was surprising, as I had already replaced CB31 and RB35 in this main B+ siliconchip,com.au","Serviceman's Log - continued circuitry and decided to replace it - just in case, ! Well, Mrs Austin and I were both \u00ec lucky as this was the cause of the prob- lem. Afterreplacing it, the set came on and ejected the tape correctly. And the relay stopped chattering. The rear-proiection LG Mr ard Mrs Paterson have a massive 60-inch ((1,50cm) LG rear projection TV (model PF60A3Q, MPBTA chas- sis). Its problem was that the picture was flashing black and white and the sound was giving a knocking noise intermittently. Well, the set was so big that it wouldn't fit into our Toyota Hi-Ace for transport back to the workshop. As a result, I removed the top screen assembly so that at least we could take out the base assembly. Back on t}re bench, I fixed up a tem- porary screen just below the ceiling us- ing a large sheet of cardboard. At least, this would allow me to monitor what was a very intermittent problem. I started by checking the supply rails and then the deflection outputs but everything was rock steady, Gradu- Ttl\u20ac\u00f8 wAS A LARG\u00c9 AIR BUBtsLE, ally, my attention moved to the small RAS UUf ING IN OV\u00c9R.H\u00c9ATI\u00d16... signal board which also has the twin tuners, IF stage and Picture-in-Pic- ture circuitry, plus the AV interface boards, I tried heating, freezing and current protection circuit, making it (CP-420 chassis). The problem was a less sensitive. Basically, this circuit tape jammed inside and a relay that vibrating these circuits but derived includes QB31 which is switched on was chattering on and off continu- no new clues. if the voltage across R835, the main ously. LG were helpful and suggested HT feed resistor, rises too far, due to Unfortunately, I had no circuit for replacing crystal XT75 but this too excess current. This in turn switches this model but being adventurous, transistor QB05 on via D832. decided to go in blind. I started with made no difference. Finally, despite In all, a total of seven components acareful examination of thewhole set, its cost of$500, in the end an \\\"execu- are involved in this circuit and they beginning at the power supply, look- tive decision\\\" was made to replace the all tested OK in-circuit. Replacing ing for \\\"hot spots\\\", marks or stains on whole panel., QB3 1 (2SA101BI finaily fixed the fault, the PC board \u00e1nd on components that although the original tested perfectly WelI, the new one was fitted and the might have been under stress. after removal [I\u00e7 = 6\u00a1\u00a1\u00a1, Is = 4,56m4, picture was now consistently perfect Luckily, the voltages were actually hf\\\" = 91, Ir = 2.5m4, VBE = 0.73 and marked on the printed circuit board but there was no sound at all! no collector emitter leakage). (bless the Teac designers; if only other '\\\\fter a lot of crawling around on I wasn't that surprised because leak- manufacturers would do this more hands ald knees, age can often develop between the often), The main power supply itself the floor on my al seemed OK but although the EVER leads of a transistor due to dirt and 6V rail was correct, the EVER BV rail audio amplifier probe finally revealed was down to only 5.5V. The 6V rail corrosion - especially ifthe set lives a problem with the relay RL601. It had is usually for the microprocessor and near the beaches. lust by moving the digital circuits, while the BV rail fed poor contacts, so Ireplaced itwith one leads slightly (eg, when removing the transistor) can cause this corrosion the remote control relay solenoid, from an old board, to \\\"flake off\\\", restoring it to working This BV rail is supplied by a separate Finally, the set was loaded back order. That said, it's quicker, cheaper switchmode standby power supply into the van ald reassembled back at and more reliable just to replace it. and ICIBO7 (TOP210) was running hot, its leg\u00f3 turning brown. Before order- the Patersons. After reassembly, it aII Teac Televideo ing a new one, I noticed a small 4zpF worked properly. Thank goodness, Mrs Austin brought in a smart silver 25V electrolytic (CB O) in its control Fixing Philips little 1999 Teac Televideo MY4B22 One of the most common faults in 50 StLtcoN CHtp projection TVs is the failure of the convergence output ICs. Recently, we had a Philips 2002 46PP8621\/79 using a DPTV325A\u00c2 siliconchip.com.au","D EFlt 2005 - the most valuable tool in the workshop! Do you repa\u00a1r domestic electronic appl\u00a1ances? lf so we have information that will save you time and money. EFIL is the industry leader when it comes to technical information that will help you repa\u00a1r electronic products quickly- Choose from our list of products below and contact us today. \u00a1 EFII 2005 database repoil is a printed manual with 31,496 of the most relevanl faulls and remedies. We have culled the older information and list only producls still viable to repair. This report also includes cross-reference charts and a comprehensive part supplier list. o A variety of other text books covering subjects such as Digilal Television, Power supplies, CD servicing and Deflection circuits. Check out our web site for prices and more details. EFIL is Australia's most comprehens\u00a1ve listing of faults and remed\u00a1es f 0r domestic electtonic products. Gan you afford to run your shop without it? Gontact us today to putchase your copy. Electron\u00a1c Fault lnformat\u00a1on L\u00a1brary prv Lrd ACN 071 754 428 P0 Box 892, Sunbury, Victoria, Australia, 3429 Ph. (03) 97406994 Fax (03) 97406990 www.efil.com.au Ema\u00a1l: [email protected] Custom-made Lithium lon, NiCd and N|MH High-quality single cell chargers High-capacity 9Ah with independent channels. Charge rechargeable D any combination of NiCd & N|MH OcroBEn 2oo5 51 AA and AAA cells siliconchip.com.au","Serviceman's Log - continued it had gone off while he was watch- ing it and now only the standby light flashed. When I got it on the bench, I found that it gave one green flash and chassis. Both the STK392-120 ICs 11V rail on the cathode of DzSt and then two red flashes, indicating an the emitter of Qzoz, had exploded (ie, 7044 and 7045) on the C4 small- Over Current Protection error (OCP). signal module were short circuit and - literally. A quick check soon revealed that the reason wasn't obvious until you Mrs Downie said she was watching the TVwhenthe sound suddenly died. the horizontal output transistor Q533 examined the IC heatsink, Insuffrcient She claimed she heard no bang or any BU251sDX had gone short circuit. And silicone heat transfer compound had other loud noise, that was because flyback transformer been applied in the factory and on ICz03 (T\u00c28z+sK), the sound output IC, was also dead and replacing both T511 (Part No.1-453-308-41) - which both ICs, there was a large air bubble, these components fixed the problem was the real culprit - was arcing. completely, resulting in overheating due to poor Replacing these parts quickly re- But why, or rather how, did this heat tralsference. stored the sound and picture but I Applying an even layer of thermal fault come about? There were no other problems I could find with the set and wasn't quite out of the woods yet - a compound over the entire area of 4:3 picture with a bright object on it the new IC flxed the problem com- you would expect something like a power surge to cause this violent fault produced noticeable \\\"blooming\\\" of pletely. to occur but apparently there was none the raster. The mystery fault - it happened on a normal sunny day It didn't take a genius to figure out I encountered a mystery this week, for which I have no answer. for no reason. Explain that. there was problem in the ABL (Au- I was called out to Mrs Dorirmie's The big Sony tomatic Brightness Limiter) circuit. Sony 1997 KV-G2L52 (BG-2S chassisJ, Mr Mosely insisted we collect his This comes off pin 11 of the flyback which had no sound. Normally, these heavy 2002 Sony KD32DX40AX FD tralsformer and is held down by two are pretty straightforward to fix and Tiinitron TV (FE-2 SCC-U7BA - A resistors to ground - R51B 6.BkO and the cause is fairly obvious,like the ear- chassis) when I said we would be un- phone socket has become dry jointed able to fix it in his home. R510 470kQ. The former had lost a or the headphone lead is frayed. When we picked it up, he said that little chunk out of its body where the In this case, I found that capacitor grey band should have been and was C253 (100pF 16V) whichhangs off the open circuit. Replacing it finished the repair properly. Now the diffrcultbit - getting sc it back to Mr Mosely. * Srt-rcon Cnte logo siliconchip.com.au Iprinted in goldoloured ring on spine & cor\u00e6r * ffve ard g\u00det \u00fa\u00a1em ! Available only in Australia. Buy fiue & get them postage free! Just fill in the handy order form in this issue; or fax (02) 9979 6503; or ring (02) 99795644 & quote your credit card number. 52 StucoN Cntp","ocrober 2 00 5 Touch Screen TFT N\\\"ETV STORE OPEN IN Wind Powered Generator Burst\u00a1ng with value. SU \\\\'SH IN E VICTORIA This 7' 12V monitor ha This small scale project enables 204 Mclntyre Road you to build a real working wind superb p\u00eccture resolut\u00a1on Sunshine Vic 3020 generator, and then use it for & exceptional audio Ph {03} 9310 8066 exper\u00a1menting lt can supply uP clarity Featur\u00a1ng touch to 10VDC @ 100m4 (depending screen capabilities, rs\\\" Clock Kit on wind speed), and features an which enables use on-board 330uF capacitor so you w\u00ecth laptops\/PCs or LEDs can store the energy fo\u00a1' later other VGA operated use Kit \u00a1ncludes all parts to make peripherals w\u00ecth USB \u00a1nterface the generator, fan assembly, and For those who want to complete pedestal Stands 250mm high their in car entertainment system with a top of the line viewing devrc 5\\\" B&W Surveillance System Susoended World Glo e Ou\u00ecck and simple! Consisting of a 5\\\" B&W witli Pen & Pen Holde surveillance mon\u00ector, two cameras, \u00e2nd two dummy cameras The real cameras simply plug in A fascinating 9f\u00fc. with their 10m lead, and the The electromagnetic levitat\u00ecng globe floats in thin EXCLUSIvE air and seems to defy the TO JAYC\u00c2R laws of circuit, and also produces a grav\u00a1ty. dazzling display with the 60 blue Remote Control Sailing Ship LEDs around the perimeter lt looks \u00a1 -\\\\ot\\\\ -r This well amazing, but can't properly be \\\\\\\\ \\\\il \\\\Bl I constructed 1 :420 explained here We have filmed it scaleRCmodel of \u00a1n action so you can see for tvt\u00ec H BI Ut rhe 1 gth century 'Cutty Sark' is a yourself on our website, so check must for collectors and boating it out! Kit supplied with double s\u00a1ded enthusiast Marvel at the intr\u00eccate s\u00a1lkscreened plated through hole PCB, Simple Surveillancel Covert surveillance is now detail right down to possible with the,use of this 2 4 GHz transm\u00ectter and all board components as well as \/receiver package Mon\u00a1tor remote locations up to the life rafts With a f ive metre remote control range around 1 00m with video and audio capture Keep an and effic\u00ecent use of battery powet this product will eye on the front of your home, office or shop from out the back w\u00ecthout the hassle of \u00a1nstalling cables The guarantee hours of fun for the whole camera and receiver can be mains powered with the family plugpacks provided The receiver has composite v\u00a1deo .Size: 205 x 125mm RCA output to go to the monitor Choke A Chook Relieve stress with a bit of and or recording device violence! Th\u00ecs annoying Extra camer\u00e2s available chicken dances around and squawks Funny for about one Cat OC-3581 $129 00 second! Grab him by the throat and he screams and gags Here's a great water scooter that's been designed Funny forever! (not specifically for family fun in the pool, lake or recommended for children) protected beaches. The powerful motor can reach a .Approx 300mm tall maximum speed of 3km\/h and is powered by a rffsqul\u00a1s5 { \u00a1 AA rechargeable battery wh\u00a1ch gives around batteries {not incl) 40 - 60 mins running t\u00a1me lt's lightweight enough to carry with one l 2.4C'Hz Wireless Colour LCD Receiver hand and portabrlrty rs guaranteed by This portable monitor \u00a1s ideal for the included sports carry bag - perfect keeping an eye on a sleeping baby or kids \u00ecn the back yard pool Also useful for the kids to take on Vour next for small office & commercial riverside picn\u00ecc, lt's easy to manoeuver locations Accepts up to four cameras Battery operated and control w\u00a1th comfortablo grip .65mm colour screen oAudio & video output handlebars and can even be used for .Battery or mains power shallow snorkelling oPowered 6y 12Y 7AH battery (included) oUp to t hour's intermittent use time or 40 min continuous oThrust: 5kgf TE[EPHoNb 1800 022 888","Watch Movies, Listen to Your F Mini Digital Video Camera Songs on this l GB MP4IMP3 Player A digital came\u00a1a for under 5200! Check th\u00a1s outl This easv to use camera fits in the palm of your This blows conventional MP3 players and solid state flash hand The recorded disks out of the water! Th\u00a1s un\u00a1t is feature packed, just check video can be out the line-up! '- aa:. -''= transferred to a .MP3 player of course - 'l GB storage for a few hundred songs! computer for editing or simply viewed directly \\\\.JPEG picture viewer - run slidesh\u00f2ws for you and your friends on any TV .Built-in FM rad\u00a1o with AV .Voice recorder - take voice notes or record conversations (with permission of course) rnpurs .MPEG-4 player - so you can watch full length movies on the go! NOW AVAILABLT Features It measures just 75 x 37 x 14mm, and weighs less than 409 ! includea3l Megapixel The 1.3' high resolution TFT LCD screen provides crystal clear software resolution for stills, 1 5'colour LCD screen, 5 layer glass lens; 32MB internal memory, SD\/MMC pictures, and is the perfect way to keep yourself entertained. See our website for full details. Was $\u00ed199 Portable USB MP5 Player I2BMB MPS Player with LCD Pedometer with l2BMB MP3 Play musiclrom any MP3 music or four Time flies when you're exercising! USB Flash Disk. hours of WMA music lt has 5 Built in MP3 player The system looks Iike a pair of classy inbuilt equal\u00a1sation settings for stores up to two optimum sound and can hours of music. portable speakers but features an in-bui\u00ect MP3 decoder operate just as a USB lncludes calorie that will play MP3 files straight from any Flash Disk flash disk Was $149 count\u00a1ng, distance The speakers are small, light, and stylish and can go monitor as well as a These might look like any other quality stereo clock Supplied with USB interface iust about anywhere The system also incorporates an back-phones, however these little beaut\u00a1es cables & earphones Jize: 68(L) x external input so you can play other devices such as actually include an impressive MP3 39{W) x 22 S(H)mm, Was $119.95 CD players or Walkman etc Operates on 9 VDC and a mains plug pack is included the controls you Wireless MPi Modulator For ln-Car Use need to listen to l-puE N,lp ocroBER-l your favourite Use your USB flash drive and this clever dev\u00a1ce music The 128M8 on-board to play your favour\u00a1te MP3 files in the car, Wireless lnternet Antenna r memory will hold around two The unit is the size of a normal car hours of music and run for about cigarette lighter plug and is Having trouble 1 5 hours on one charge of the fitted w\u00a1th a USB socket internal battery getting unwiredT Vou to play your lvlP3 by transm\u00a1tting them to This wireless modem your car's FM radio You can also use the antenna replaces the dev\u00a1ce to listen to an ordinary portable existing 'rabbit ear' CD, DVD or MP3 player,or any other audio sources Portable iPod \/ MP5 Player iPod Car Charger - unv Charge on the go! Dock and Speakers \u00f5 on your wrfeless Connects to your Featuring 1.5\\\" micro o car's cigarette lighter broadband modem speakers, & an internal socket lo charge your ; amplifier. they sound @ iPod via the Apple 30 and boosts the great, It all folds up to a p\u00a1n connector Great for o) J signal to improve travel\u00ecers coverage lt can also neat 2869 package when improve perform\u00e2DCe r-odem noi not in use Powered by in difficult areas The inciucecl 4 x AAA ba\u00cfler\u00a1es not antenna can be mounted included iPod USB Data Cable \u00ecnside the house or in a protected .iPod not included Attention PC users! outs\u00ecde location for optimum reception Supplied with aA r\u00e8placement cable for '' USB 2.0 Multimedia Speaker Pair N type to IVCX lead & mounting bracket lost or broken iPod data These trendy two channel cable Works with all iPods oSize 135(W) x 160(H) x 30(D)mm speakers plug into your that use the 30 pin Apple computer's USB port No connector Commonly used PCI Wireless Network lnterface Card on Windows computers need for messy cabling or Features include external power supplies like iPod Firewire Data Cable IEEE 802 119 wireless conventional multimedia network compatible speakers lnteroperation with t a \/ Charging Cradle & Cables lEE802 11b This un\u00cct will accept a stereo signaf, Charge and update your iPod easily or decoded AC-3 inputs and 11Mbps networks distribute it to produce a with this cradle ltwill charge the .64\/128Bil WEP wonderfully presented sound stage The unit has battery and you can connect the encryptron five 2 5'satellite speakers, and a 6 5\\\" .54Mbps high speed transfer rate woofer with a total system output of USB or Firew\u00ecre cable to \\\\:i .40 - 1 00m indoor range 55WRMS .1 00 - 300m outdoor range nupdate your playlists etc .Low power consumption Fgtrdr .Compatible with Win98\/SE\/2000\/MEr(P Pod not .Plug and Play compatible ncluded INTERNET> www.jaycar.com.au","RIBBON TWEETERS Surround Speaker Floor Stands 2.4GHz Wireless Audio Video Senders Aatffloardsatb!le o Spectacular U.S. Stock Purchase 3 Piece Surround Sound Add - On use as many receivers as you ltke, wlthout degradlng signal quality Each unit comes supplied with stereo All Audiophiles knowS audio and video transm\u00ectter and receiver, mains plugpacks & RCA cables Transmission range \u00ecs up to that ribbon tweeters are the 100m, but depends on the type of construct\u00a1on ultimate speaker for smooth high (and very materials used high) frequency performance. Was $99 Unfortunately, a good ribbon tweeter can cost between $1 00 and $500 to thousands for some custom German ones Even high-end enclosure manufacturers all opt Extra receiver to suit Cat AR-]833 Was$69 for dome tweeters simply because \\\"ribbons\\\" add too much to system cost Jaycar have made a mass\u00ccve stock purchase from a Heavv Dutv Soeaker Tripoil sta\u00c1d ' major US organ manufacturer who makes both p\u00a1pe This rugged stand extends to iust and electronic organs They are an 80+ year old under 2 metres. Supports speakers, combo amps, lighting rigs up to and company and we cannot tell you who they are! They around 45kilos. Tough rubber feet are mounted under each tripod leg for are restructuring production of their high-end organs safe, non slip support Made from strong aircraft grade and the\u00ecr stock of ribbon tweeters have been sold to us easy transportation and long service life far, far below the 10,000+ factory gate pricel Their ln Wall Speakers massive loss is your gain A great mount\u00a1ng solution! The tweeter is made in Japan by the venerable lf space is limited, or you s\u00ecmply don't want free standing speakers, manufacturer, Foster The device itself h\u00e2s multiple then these are a great option for you 8 ohm impedance allows them to be ribbon d\u00a1aphragm components in same-phase used in an aray of appl\u00a1cations Supplied w\u00a1th attractive white baffle conf\u00ecgurat\u00a1on There are two bas\u00a1c types o1 ribbon covers tweeters, stat\u00a1c or dynamic type Th\u00a1s product \u00a1s the oln ceiling speakers also available! CAR AMPTIFIER DEAL dvnamic type which has convent\u00a1onal impedance (8 2Way Cat. CS-2440 $99.00 Celebrate our hot Rew car 3 Way Cat. CS-2442 $:149.00 aud\u00a1o range! Buy any of our ohms) and is more efficient Each speaker is supplied amps together with any of e w\u00a1th a datasheet and securely packed full retail pr\u00a1ce on power Even if you do not have any specific need for a ribbon puanrdchspaeasketrhceabsaleme tweeter at the moment, we strongly urge you to ! consider purchasing \u00ect for future use At the price we *Does not apply to aheady discounted cable prices. are offering, we expect OEM (manufacturer) interest As it \u00a1s a d\u00a1stress stock buy, quantities are limited On many occasions in the past we have warned customers of this and the slow ones miss out Finally, we think that technically, two tweeters per enclosure would be the way to go They should not be overdriven Note also the fairly high crossover frequency Type: Powe\u00a1: Regular-phase 100mm \u00a1ibbon tweeter I 20 Watts FMS (cont),50W max. SPL: g2dBlwatt. Freq Resp: 6K-40KHz +\/-2dB {SUBLIME!). large super tweeter that made lu.t y\\\".r'! lmpedance: 8Q. Grossove\u00a1 Frequency: 6,400H2 (12d8 \/ Octave). ln keep\u00ecng with this suggest\u00a1on, we have a special range gre\u00e2t, but the new Kevlar cones take them \u00ecnto price for a set of 4 pieces a realm of their own Check out our caralogue on page or buu os o set g{F(p9 of a f\u00f3r sl5\u00f3'oo eochl Speaker Crilles .89 5dB sensit\u00a1v\u00a1ty 99(9F 2x8OWRMS @4ohms 2 x 1OOWRMS @2 ohms These grilles are designed to look like mag wheels To 6.ry 1x200WRMS@4ohms compliment the look of your car They are f\u00a1tted w\u00ecth 6 cot. Ar-0420l\u00f39's blue high brightness LEDs wh\u00ecch create a great .91 3dB sensitiv\u00ecty iridescent blue glow to enhance your installation LEDs 4x50WRMS are less fragile than neons, so they won'l blow and .93 5dB sensitivity they use very little power All require connection to 4xSOWRMS@4ohms your car's 12V power 4 x 80 WRMS @ 2ohms 2x160WRMS@4ohms 6\\\"x9\\\" \u00d8\\\\_..{a :\u00ee:\u00cf,:ff:orcoaxiar \u00c9'.\u00f5 cot. \u00a1\u00a1.0422 s199's 4x100WRMS \u00a14x13oWRMS@4ohms 10' speakers offer high performacne and top value for 2 x 150WRMS \u00a14 x 19oWRMS @ 2 ohms 2x1SOWRMS@4ohms .2x380WRMS@4ohms money They contain a massive super tweeter and a 2 x 255WRMS @2 ohms 1 x 500WRMS @4 ohms lcon - respnse precision qual\u00ecty kevlar woofer Check out our cot. \u00c0\u00c0-0424 s249'es cot. l\u00a1-o\u00a120 5299'e5 cataolgue and website for full details 800WRMS Class D 1x400WRMS@4ohms 1x700WRMS@2ohms 1x820WRMS@1ohm cot. A\u00c0-042s 5599 TELEPHONE> 18OO 022 888","REMOTE CONTROL FUN Multi-function Vacuum This \u00eds one These futur\u00a1stic i Sit back and relax wh\u00edle your tough cook\u00ede! battle tanks actually pack a punch and r cleansthe house! Smash it, crash you will cop a \u00cdt and it still mild electric It automat\u00eccally moves comes back for around obstacles, and an shock if you\u00a1' tank intelligent optical sensor gets a d\u00a1rect h\u00a1t assists in avoiding walls and obstructions Works 5 in 1 Mars Rover, best to supplement your Boat & Submarine manual cleaner, not replace it Was $199 -:e;.L\u00cb Remote Controlled Ciggle It \u00a1s a realistic looking fish vehrcle wrll g\u00eba t- z\u00c9 which can be manoeuvred Put a sm\u00a1le on someone's you through almost anything. lt is actually three dial! Just press the remote control for one of six amusing vehicles-in-one and will travel over land and, when the giggles to get eveyone wheels are released, it will sk\u00ecm across the water as a New lmproved Fart Machine boat or dive under it like a submarine Our best fart machine yetl With twice \u00eas many real\u00a1stic 4 x AA batteries are required for the sounds as our regular model, this new fart box is sure to vehicle 3 x AAA for rhe remote. shock everyone at a party Mini Remote Control Yellow Submarine Due to popular demand, we have extended o\u00far remote con\u00cdof range to include the mini controlyellow ine! ,t. Have hours of fun making\\\"'SAVE:. r will zip around the bath tub, pool or i fish pond at surprising the submarine chase the \u00ec speed The craft has an fish ori whvy not plavy writh \u00a1itt l\\\\ internal battery that t+rin irhne obatfnh ltubo or pooorl. rH-roouurrs \\\\i is charged from the 3Blu1e1m\\\"oId:ell Ia:l:s:o:\\\"\\\"0\\\"'o' battery box supplied w\u00a1th available GT-3045 TIGHT UP GADGETS LLIXFO\\\\ TORClIES CRE,\\\\T \\\\E\\\\\\\\ PARTY LICHTI\\\\C R1\\\\CTI I tt Luxeon LED Torch Heavy duty alum\u00ednium, it Disco Party Light Set PAR56 300W Spotfight Col Sl-3333 Create your own dance party atmosphere! Heaps of power! Requires 3 x AA batteries Get your party started the r\u00a1ght Great for theatrical and effects not included Was 559.95 lighl\u00a1ng, it includes an w\u00a1th some creat\u00a1ve adjustable mount\u00a1ng bracket, 3W Luxeon LED Torch quick change gel holder, and an light\u00a1ng to help set the 800mm mains lead The torch head rotes to change .Globe not included lrom na\u00a1row or to a wlde angle mood. Just add music Use SL-2977 $34.95 beam concentration. and you're set! All mains powered Kit contains: 75W Strobe Light Requires 3 x AA batteries o20cm mirror ball .1RPM mirror ball molor Super br\u00edght! Silver 5W LED Aluminium Torch oPAR36 spotlight. This features a super .PAR36 globe. This LED emitter is the highest o4 x coloured gels for PAR36. flux LEDs in the world deliver\u00ecng bright 75W flash tube and imed with music the brightest sol\u00a1d-state lighting Col ST3fl\u00bf Lighting Clamp solutions available Sturdy mount\u00a1ng! Lighting clamps are used for securing Designed for pinspot lights and accessories to 5 Watt Torch lighting stands Measures Finished in heavy duty aluminum, it produces Cot SI33l9 78(L) x 45(D)mm MiniStrobe Light blinding white light. Requires 6 x AA batteries Was $159 PAR56 Spotlight with Colour Wheel & Motor Great for part\u00a1es! Features a variable flash Luxeon Head Torch crew-cap globe holder rate up to 1 0Hz, and is design, is much better than the older spr\u00ecng-clip mains powered. Uses a This head torch is sure to style. The 245mm five-colour wheel and Xenon flash tube, and outlast any conventional motor is easily mounted for simple measures 85(W) x 50{H) incandescent torch Requires 3 x AAA batteries installation. .Globe not included Cot SI.332l Use SL-2964 $9.95 4 Jdar:ar OBDERINGFOF INFOBMATION AND TEIEPH0\u00cd{E> 1800 022 888 \u00a1fi\u00a1TERtIEI> www. jaycar.com,au","The Amazing Dont wait until you get home for lonic Shoe Dryer that well deserwed massage th\u00a1s Eliminate odours from your shoes with this Flygun is a safe, massage pad can deliver stTaight fun, and effective awayl Designed to be used in the Controlled by a micro-computer, \u00a1t method of killing car, home or office, it is lightweight to adopts an advanced \\\"ionic breeze flies and take anywhere w\u00a1th you lt fits over technology\\\" which will neutralize the mosquitoes Launch most seats thanks to its elastic odour and eliminate the nasty gt'owth the spring powered swatter al straps lt also has a built-in heater and 3 variable your target! lt \u00a1s safe, fun and \u00a1ntens\u00a1ty levels to make your really does workl massage that much more comfortable lntelligent Automatic Rubbish Bin lonic Air Purifier UHF TRA\\\\SCEIVER DE\u00c5L 'ol Better overall heahh. This ionic air purifier manner of professional and of the is much more than leisure activities This is a quality rnreliger\u00ecr ruoorsn orr\u00ec anu the lio just an effective radio and, wh\u00a1lst just 0 5W will open automaticallyl lt will odour removing air output, \u00a1t is NOT a toy Open also close back up again, so you purification system lt silently fills the air field transmission range is up never need to touch it with negative \u00econs which research shows can to an incredible 5km, with 231 capacity. help promote good health and typical c\u00a11y range up lo 1 km improve vitality. Was $39.95 withBathroom Sc\u00bfles Analysis .:Electronic Body Fat world's thinnest air purifier, effectively capturing ALARMS 'i\u00c1vt ,- airborne pollutants and allergens to g\u00ecve you a healthy clean environment Do you kno much excess body u are CONTROL carryrng, or are you one of the lucky tev who are within : heahhy lim its. These excellent scales can be ;:.'::.:- cal\u00a1brated for use by 8 different people. The scales use 'body mass index' to measure the body fat content of each person to wilh\u00ecn 0 5% Requires 2xCR2O32 batteries included Was $89.95 \/ SECURITY \/ ACCESS All system Wireless lntercom with No contact required! Door Strike Release components by a central location, or just to control access Open the door from through a front door lt is 12V powered, so you can {sensors, sirens) anywhere! This great unit acts use it in remote locations, and the reader unit is as an intercom, with a wireless splash proof. are connected receiver Take \u00a1t out the back, or .5 \u00caFlD cards included. around the house lt also has .N.O. and N.C. relay contacts to the control electronic door strike control, so you can let your visitors in Realistic Dummy Dome Cameras unit via a '' \\\\ too ! Extremely realistic! two-core Downlight Style CCD Colour Camera Both models can have standard non-polar l. - Not you\u00a1 convent\u00cdonal type \\\\ board cameras fitted to make camera. Ihis 1\/3\\\" Sharp CGD them real working came flat wire Corner Mounting camera \u00a1ncorporates a Dummy Camera The unit has a built-in keypad w\u00a1th status LED and downright holder for flush Metal mounting on any ceiling or flat mounting for three modes or operation (Home, Out, Off) surface. This camera is a perfect stabiliry. Supplied with: .Main control unit .Two PlRs alternat\u00a1ve to conventional Dome type .Four Door or Window contact reed switch cameras lt provides 0 - 90 degree adjustable pivoting camera head for securing that .External Siren perfect angle Holder is finished in polished metal giving a classy .240VAC Adaptor and styl\u00a1sh look. .50m two-core flat wire and clips .Screw\/wall plug packs .N4a\u00ecn un\u00a1t: 160(H) x185(W) x35(D)mm .Extra PIR ro suit LA-5476 $29 95 3 Zone Wireless Home Alarm FOR INFORMATION AND ORDERING into your bumper bar or similar, and is Right Angled Bracket TEIEPH0\u00cc{E> 1 800 022 888 powered stra\u00a1ght from l2VDC Highly noticeable for See installation article in maximum deterrent April Silicon Chip. JagI:ar www\u00a1aycar.com.au","WE HAVE A MASSIVE Small Solar Panels SOLAR PANELS RANGE OF INVERTERS ldeal for charging SLA Amorphous Type Solar Panels Pure Sine Wave lnverters batteries! Suppl\u00eced w\u00a1th reverse current diode, 2m lead w\u00a1th alligator cl\u00ecps Great rel\u00a1abil\u00a1ty! Pure Sine Wave inverters 12V 1.26Watf Be aware of cheap Amorphous solar panels which will provide a ma\u00ecns waveform that is much closer to that of conventional mains supplies This is l2V 4.5 Watt simply not give the claimed output power All our panels much better and sometimes required when powering sensitive equipment, some Smart Solar Battery Charger will give cla\u00a1med power at 33 5\\\"S lat\u00a1tude, ie, Sydney sw\u00ectchmode power supplies etc ln sunlight, \u00a1t suppl\u00a1es 15V at around Amorphous power output gradually decreases over the Power Surge VDC VAC Cat. No. Price 100-120m4 of current. 150w (300W) 12 ro 230 Ml-5080 $229 Th\u00a1s is enough to years, unlike polycrystalline which do not Suits battery chargers, fax machines etc keep a 12V Voltage Power Cat No. Price 6 Volt 1 Watt 300W (500W) 12 to 230 Ml-5082 $289 battery that is 12 Volt 2 Watt ZM-9020 $29.95 infrequently used 12 Volt 4 Watt ZM-9024 $39.95 Suits laptops, lamps and fluorescents up to to\u00deped up lts 12 Volt 10 Watt ZM-9026 $69.95 300W, 34cm TVs etc for that second car, 12 Volt 15 Watt ZM-9030 S139.00 ride on lawnmowel tractor, boat, etc, etc lt's ZM-9045 $199.00 500W (1000W) 12 Io 230 lvl-5085 $329 housed in a plastic case, and has an output lead to cigarette lighter plug, w\u00a1th a LED. BP Solar 12V Polycrystalline Solar Panels Suits power tools, laplops, microwaves, oS\u00ecze 370(L) x 160{W) x 20(D)mm blenders, small fridges etc Top quality panels at a g\u00a1eat price! 1000W (2000W) '12 to 230 Ml-5088 $799 Suits H\u00cc-Fi systems, computers, 68cm Ws, \u00a1ighting, fridges etc! 1500W (2500W], 24 to 230 Ml-5089 S999 Suits large TVs, many power tools, light\u00a1ng, computers and more Modified Square Wave lnverters Great value! With a host of safety features 20 Amp 12V Super Solar Panel Regulator travelling at term\u00ecnal velocity They are molnted in an such as overload & short c\u00a1rcuit protect\u00econ, dieleclric isolat\u00econ between the battery and With a massive 20 amp current handling, this anodised aluminium frame that is weather proof and secondary voltages and more They all have switchmode solar panel generator does excellent surge ratings and boast over 90o\/o not require a heats\u00a1nk. lt installs corrosion resistant See website for full details easily, is lightweight and features efficiency automatic operation, LED power Power Warrantv Cat Price indication and boasts an efficiency PowerSurge VDC VAC Cat.No.Price up ro 99 2% @ 20 amps Not only 10W 10 Year ZM-9060 $235 100W (300W) 12 To 230 Ml-5100 S3995 does the regulator sw\u00a1tch the solar panel \u00a1n and out 20W 10 Year ZM-9062 $359 depending on the battery voltage, the regulator will 80W 20 Year ZM-9069 $799 Su\u00a1ts battery chargers, small lights, and low disconnect the solar panel after approx power devices WAS $44.95 SAVE $5 20 m\u00ecnutes at night fall to prevent any Want to use Stoohlaerlpbyuot uDl on't Know How? losses into the panel overnight. 150W (450W) 12 to 230 Ml-5102 $48.95 We have books \u00e9:f-=- and indicates charging and full Suits battery chargers, fax m\u00e2chines etc! battery conditions us\u00ecng a yellow and green 3mm LED remote and mobile power respectively. ldeal for charging 12V SLA ba installations 3O0W {1000W) 12 Io 230 Ml-5104 S99 95 solar panels up to 60W. 5 amp fuse and fuse holder recommended not supplied These rechargeable batter\u00eces are suppl\u00eced in Suits laptops, lamps & fluorescents up to four-packs for convenience, and are 300w, 34cm TVs erc WAS S119.95 SAVE S20 12V Solar Battery Charging Regulator 400W (1200W) 12 \u00eeo 23O Ml-5106 $159 95 This charging regulator is suitable for charging 12V lead-acid batter\u00a1es. lt is able to use Suits laptops, lamps & fluorescents up to power from a number of sources including: a 12V solar Panel, or a 400W 54cm TVs etc filtered DC supply f rom 13 8V to 1 5V Charging curtent and voltage are 400W (1200W) 24 10 230 Ml-5107 5169 95 automatic, so it \u00a1s ideal for chargtng batterles Su\u00a1ts laptops, lamps & fluores to 400W, 54cm Bulk Pack Alkaline Batter\u00a1es TVs & more from 24Y These bulk packs represent excellent value for money. 600W ('1500W 12 to 23O Ml-5108 $249 95 We have them made to the same specificat\u00a1ons of those well known Suits power tools, 68cm Ws, laPtoPs. microwaves, small fridges etc ryexpensive brands advertised on but at a real\u00ecstic price 800W (2000W) 12 ro 230 Ml-5110 $29995 With a shelf l\u00a1fe past the Yea( 2O1O you cannot go wrong! Suits power lools, 68cm Ws, blenders, small AAA Alkalines Cat SB-2331 Bulk Pk of 24 51295 AAAlkalines Cat SB-2330 BulkPkof 24 51295 fridges, microwaves etc AA Alkalines Cat SB-2332 Bulk Pk of 40 $19 95 1000W(2500W) 12 to 230 Ml-51 12 $39995 Suits Hi-Fi systems, computers, 68cm TVs, light\u00a1ng, fr\u00a1dges etc 1500W(3500W) 12 ro 230 Mi-5114 $59995 Suits large TVs. many power tools, lighting, etc High Current Power Conne6fs\u00a15 You rrrin:,:i::\u00efffi:i::ll,i:lt.ii::i?ll\\\"^ililli,,tii'ili Current Poles 30 Amp 2 50 Amp 2 120 Amp 2 175 Amp 2 TELEPHONE> 1 8OO 022 888 INTERNET> w\u00ecrvwjaycar.com,au","Nelt\u00a1 \\\"Nite lze\\\" 4 Channel USB Datalogger Attn: All You'Tim The Toolmen\\\" i\\\\4a gl ite'un\u00a1Torch Accessories No more serial! ay) Nite lze accessories suit AA Magl\u00a1tesrM Record DC and slow- and small torches {not included). Grab\u00a1t damaged screw removal moving signals over very tool, but BOY it's expens\u00ecvel! Bite Light Adaptor long periods lt connects What \u00a1t does, lf you have to a PC via the USB port to a typically, (but not necessarily) Simple but effective! display real time \u00ecnformation, countersunk screw that ts This attachment f\u00a1ts over the end of slotted, Phill\u00ecps, Posidrive, your torch with a patented mouth as well as record \u00ect No Torx, Tri-Wing, tamper piece 1o allow you to safely bite down resistant, etc that is totally on it to hold the lorch \u00a1n place lt also additional power is required There are four str\u00ecpped out, this pfoduct will get it out - even if the DC-coupled input channels, monitored at up Belt Pouch to 100 samples\/second (globally) l1 head is totally hollow! All of us \\\"Ims\\\" have Not your average belt pouch! has a host of great features,-just check out our website experienced this I The extraction bit consists of a Not onlv can vou store vour torch burnishing bit that basically preps a tapered hole in on your belt, bul w\u00a1th real world use BUY THIS: the screw head You turn the b\u00ect around with the in m\u00a1nd it has a small pouch to carry Coot Antistatic Temoeratu re extractor bit out, reverse the cordless drill direction two spare AA or AAA batteries l'\/ade Controlled Solderin\u00fe Statio\u00a1 and the extractor bit bites into the prepped ho\u00ece from strong Nylon with tremendous force Works equally well on High brass, steel, stainless screws etc The TD-2059 7\\\" Fibre Optic Adaptor temperature cons\u00a1sts of two 1\/4\\\" hex dr\u00ccve bits that cover stability and screws from #6 to #1 4 gauge I n days when a 1 2V Thin and flexible! cordless drill can retail for $25 thls Light only travels in straight l\u00ecnes, but you can make antistat\u00a1c product may seem expensive it bend with this Fibre Optic adaptor. A small properties make it What it c\u00e2n do for you is priceless attachment fits right over the head of your torch to ideal for all sorts of give you a flexible light source for inspecting in tight soldering work \/ 1VATUE brand but cost a whole lot less. ABSOLUTELY They are increasingly finding their way into general AA fMagliterM to this un\u00a1t that has 3 GET THESE FREEI r rF$F!, r and architectural lighting applications and with a LEDs Because LEDs are so service life of 100,000 hours They provide up to 25 efficient, you get four t\u00a1mes longer fuletal Desolder Tool lumens per watt and are available in battery life, and LEDs don't blow! This is the single TH-1 862 $1 5 75 anumber of colours best upgrade to a torch Vou can make! Soldering lron Tip Conditioner Super Bright 1 Watt Super Bright 3 Watt LED Star Module - Red lOmW Creen Laser Module 2TS-1 51 S6 50 LED Star Module - Red Cot ZD'0520 Extremely br\u00a1ghtl Soldering Iron Tip Cleaner Cot zD'0500 Super Bright 3 Watt This laser module Super Bright 1 Watt LED Star Module - TS-1510 $12 95 LED Star Module - Amber consists of a lOmW {z*r Amber Lead Free Solder Col.ZD'0522 laser diode, lens, and driver PCB Simply connect a Works just as well as Cot zD'0502 Super Bright 3 Watt ordinary solder but Super Bright 1 Watt LED Star Module - or mirrors in your home, install shelving, lay tiles contains no harmful lead. LED Star Module - etc. The range of the laser line projects up to 6m Green Green indoor and covers an arc of 45 and 90 degrees The Supplied on a 45gm roll with Col ZD'0524 unit incorporates a horizontally spread laser to create handy cover and available jn Cot. ZD'0504 Super Br\u00a1ght 3 Watt illuminated guide lines along walls, horizontal and LED Star Module - Blue vert\u00a1cal levels lt also includes a handy ature Contro Super Br\u00a1ght 1 Watt Col ZD'0526 2 5m lape measure as well as a ruler Super Bright 3 Watt on the s\u00ecde LED Star Module - Blue LED Star Module - White Cot, zD-050\u00f3 Cot. ZD-0528 Super Bright 1 Watt LED Star Module - Super Bright 3 Watt White LED Star Module - Cot ZD-0508 Warm White Super Bright 1 Watt Cot ZD-0550 LED Star Module - Warm White Cot ZD'0510 Collimator A collimator is an optical device which is designed to produce a light beam \u00a1n which the the rays are parallel. or at least very near parallel. While we normally consider LEDs to be very focused in terms of light spread, in many applications there \u00a1s st\u00a1ll a vast quantity of \\\"wasted\\\" light spread This series of collimators are des\u00ecgned to suit our Star LED modules (lambertian LED models only) and are manufactured from quality optical components l'^uL^:1Yl-J.\/.1::-'.-,,\u00f3'''\u00f5I Collimator - 15\\\" e8 RS-232 DMM 15\\\" V\u00ecewing Angle Features a groovy blue backlit Collimator - 25\\\" screen, and a host of features. 25\\\" Viewing Angle lncludes optical RS-232 compute\u00a1- interface and PC software to store measurements on your home, workshop, or notebook computer for later analysis Please see our website or catalogue for f ull specifications ELEPHoNE> 1800 022 888","t Dr Video K\u00a1t Mkl'l Pro-Series 5 Stereo Power Amp Kit This kit enables you to make a full-sized electronic sc\u00a1reboard, in particular for B\u00e2sketball but also An even better video Suberb ampli\u00f1er adaptab\u00a1e for netball and other games. stab\u00a1l\u00a1ser! for home Cinema! Ref: Silicon Chip Ref: Sil\u00eccon Chip .June '04 One Final \u00efme - March\/April\/May Movie companies 2005 lt can be deliberately tamper with We have made 1 built for a fraction the v\u00ecdeo s\u00a1gnal to restrict final batch of P\u00a1o- of the cost of copying Get the p\u00a1cture Series 3 Stereo commercial you paid for and strip out these annoy\u00a1 Power Amp Kits. equivalents and signals from composite or S-video Once these are has a complete\u00ecy Kit includes PCB, case, panels & gone, that is the end wireless scoring all electronic components of this great amp console that can We supply a superbly illustrated and thorough control one or multrple sco\u00cde- USB Power lnjector construction manual that takes you through step by boards You can mount the score step! The Pro 3 is supplied absolutely complete with boards high up in the court, plug \u00a1t A power boost for your USB port! professionally prepared paneling, pre-lined PCB s, in 1o a 240VAC power point and then Refer: Silicon Chip high-quality high-current wiring plus all specified control them f rom a t\u00e2ble courtside with no messy October 2004 componentry Output power is 185W RMS x 2, 8 ohm lf you have a lot of and 255W RMS x 2, 4 ohm with a wiring lt features Home\/Away team scores 0 to 199, peripheral devices game period, countdown time, Home\/Away time and running from your THD at 0 008% at 180W RMS the addit\u00econ of a new 'foul' feature lt measures 900 x computer, they may See our catalogue for full specs 60Omm and comes with all pre-cut scoreboard be trying to draw woodwork, screen printed face, display filters, more current than your Speaker Bass Extender Kit mounting plates, pre-programmed microcontrolle\u00e7 USB port can provide printed c\u00a1rcuit boards, 2 4GHz transmitters & receivers, This pioject will allow full Ref: Silicon Chip April 2005 pre-punched control console with special p\u00ecezo end-of- current draw no matter how many peripheral devices you are running lt uses an external power Most audiophiles know that Contains everything included in the original kit without supply to tap into the existing line, loudspeaker enclosu\u00a1es have parts for the control console Cat KC-5409 $649 effectively boosting a natural frequency rolloff the ava\u00eclable current which is inherent in the\u00a1r des\u00a1gn. The Bass Extender kit boosts the level of the YouR LocAL JAYCAR SToRE bass to counteract the natural rolloff of the enclosure, Freecall Orders: Ph 1800 022 888 producing r\u00a1ch, natural bass lt gives an extra octave of response, and is sure to please even the most avid audiophiles .Kit supplied with PCB, and all electronic components Albury Automactically open your electronic This kit \u00a1ndicates via LED when the Alexandria Ph (02) 9\u00f399 4\u00f399 beam is broken lncludes PCB, lR Bankstown Ph (02) 9709 2822 gates or automatic garage R)7TX diodes, in r{ magnifying lens & all Blacktown Ph (OZl 9678 9669 \u00e3oo. v\\\"\\\"ehyicolue,awppit.hoo\\\"\u00e3uht (02) 93\u00f39 your 1 electronic components BBorncdioJkuvncatiolen Ph (02) 9905 3899 Ph 4130 the use of remote controls! ErinaCampbelltown Ph (02) 4620 7155 It uses a large coil sensor ro detect mov\u00a1ng Co Video to RGB Ph (02) 43\u00f35 3433 Co it metal (eg a car chassis), which reduces false The SHORT CIRCUITS Hornsby Ph (02) 947\u00f3 \u00f3221 alarms from animals and people etc Kit Ref : Silicon Ch\u00ecp May 2004 LEARNINC SYSTEM Newcastle Ph (02) 49\u00f35 3799 Top quality home cinema is increasingly PPaernrarmithatta (02) 9\u00f383 supplied with PCB, silk screened machined The Short Circu\u00ecls learning system Ph (02) 4721 3377 common in many houses. \u00a1s a great way to learn Ph 8337 case, pre-wound & insulated electronlcs lt is fun, \u00ecnformat\u00a1ve, SilY\u20acffiater Ph (02) 9741 8557 5000 turn coil, and all TsSyat.dreLnneeyoPncoait\u00ccidnyst (02) 9439 4799 Ph (02) 92\u00f37 l\u00f314 electronic components Ph Ph 102) 9531 7033 and you build great projects along the way Here is jusi Geelong Ph (03) Luxeon Star LED Driver Kit one from Short C\u00ecrcuits 3 l.lelbourne Ph 978t 4t00 Befer: Silicon Chip May 2004 Guitar Practice Ph 522t 5800 Luxeon high power LEDs are some of the Ph 9\u00f3\u00f33 2030 brightest S-Video or composite So if Component Ph 9870 9053 LEDs V\u00a1deo is the best on offer, how do you lake Ph 9547 t022 available advantage of it when your projector or in the world. plasma TV only have an RGB \u00ecnput? This unit 38\u00f33 0099 They offer up to 120 lumens per unit, and will will convert the Component Video s\u00ecgnal Gold Coast - l.lermaid Beach last up to 100,000 hoursl Th\u00ecs k\u00ect allows you to from your DVD player etc to an RGB signal input socket, power the fantastic 1W, 3W, and 5W Luxeon for input into your display device lt provides small Star LEDs from 1 2VDC This means that you you with fantastic reproduction with m\u00a1nimal speaket and can take advantage of what these fantastic degradation Kit suppl\u00eced with PCB, case, sounds great! K\u00a1t supplied with LEDs have to offer, and use s\u00eclk-screened and punched panels, colour PCB, speaker, socket, and all them in your car, boat, or caravan. coded RCA sockets,9VAC lnstruct\u00econs are in the mains plugpack, and all Short C\u00a1rcuits 3 book. electronic components. lnfrared Remote Control Tester Hamilton Ph code is detected, and also has an auxiliary output to connect \u00a1t to an oscilloscope for further analvsis Ph (09) 377 \u00f3421 Glenfield - Auckland Ph (091 444 4628 Wellington Ph (04) 801 9005 christchurch Ph 103) 379 l\u00f3\u00f32 freeall OrdersPh 0800 452 9227 IELEPHoI{E> 1 800 022 888 INTERNEt> wwwjaycar.com,au","fnteresting circuit ideas which we have checked but not built and tested. Contributions from readers are welcome and will be paid for at standard rates. -- 5-\u00c8r-DIODES LCD PANET AK l00nF MEIER SUPPTY 0lo +l 5V r.5A \u00c0,t\u00c0x \\\\l,[. r.99f' TO lNPr.\/f OF TCD PANET MEIER VR3 200\u00e7) l80a NOTE: Q2 &Q5 MUS\u00cd BE MOUNIED ON A HEATSINK 2W Discrete dual-tracking (VR1) and a 2kO panel-mounted pot ) power supply (VR2l. The trimpot can be adjusted Operation of the negative side of This DC power supply boasts so that the maximum output voltage the supply is much the same, The dual O-1SV outputs with up to 1,5,t two transistors (Q4 & Q5) are com- is 15V when VR2 is at its maximum plementary types and the inverting current handling capability and in- position. (rather than non-inverting) input of the op amp (IC2J is driven from the cludes over-cu.rrent protection. The wiper of VR2 feeds the non- reference voltage. inverting input (pin 3) of op amp IC1. A 12VAC transformer provides ' As the two op amps are connected The gain of the op amp is setto 2.2 by input power, which is half-wave together via a common 1Okf) resis- rectified by diodes D1 and D2 to virtue of the 12kQ and 10k\u00c72 resistors tor in their feedback networks, the positive and negative rails track one feed the positive and negative rails. connected to the inverting input, Its another very accurately. Out of a se- Two 470OpF capacitors provide bulk output (pin 6) drives the base of a ries of units builtusing 1% toleralce filtering. series pass transistor (Q2), which is resistors in the feedback networks, the worse case tracking- accuracy Tralsistor Q1 acts as a constant effectively inside the feedback loop. recorded was +40mV. current source lor ZD'L. to help en- This means thatwith 6.BV applied to sure a stable 7.5V reference with the non-inverting input, the voltage If desired, an LCD panel meter cal at the output of the supply should be used to display the positive out- varying rail voltage. The LED and the be close to 15V. put voltage. A separate +SVregulator 180\u00c7) resistor in the emitter circuit Over-current protection is provid- ed by transistor Q3, in conjunction (REG1) provides power for the meter, determine the current. Select a LED with an 0.47\u00c7) series resistor. When while a resistor string incorporating with aforward voltage of about 2.4V the load cunent reaches 1.5,A., the a 2000 trimpot [VR3) divides down voltage drop across the resistor is the output to meet the +200mV FSD and alter the resistor value ifneces- about 0.7V causing Q3 to conduct, meter speciflcations. sary to get close to 10mA through This diverts current away from the Rod Smith, the zener diode. base of Q2 and so reduces the output Bendigo, Vic. ($a5) voltage, The 7.5V reference feeds the top of an adjustable voltage divider network, comprised of a trimpot OcroBER 2oo5","I2V DC FUSE +12Y REGI +5V 47OO\u00a1rf 10C) INPIJT 7805 -+t + l\u00f3v I 00pF lw a l\u00f3v -oR- 9V AC 100\u00a1rF \u00ef INPUT \u00efl\u00f3v DSI 8820 TEMP a.7l< +5V SENSOR lcl lN) DA PICAXE-I 8X tN7 tNl otrfo tNil otjTl IN\u00f3 OUN ott\u00ef\u00ec TsER Ot Ot l\u00a1f 1 00nF sER tN ot fS Ot f\u00f3 \u00ef ott\u00cd7 PNIOO lklMoDULEl \u00e3rt PN2OO CBE PICAXE-controlled PICAXE-1 SX microcontroller, which Looking fi.rst at the temperature bird brooder maintains a set temperature in the icebox by controlling a Peltier mod- readout part of t\u00ece circuit, the two This ingenious design controls the temperature in an icebox (an \\\"Esky\\\" ule. A temperature sensor in the 7-segment LED displays are driven or similar) so that it can be used as icebox provides feedback, while two by a511 display drivers (IC2 & 7-segment displays give the cuttent a bird brooder. IC3), in turn driven by four outPuts or set temperatu\u00a1e, which is alterable The circuit is based around a (OUT0-OUT4) of the PICAXE micro. via two pushbutton switches. The data inputs to these ICs are tied together and alternately enabled by 62 Stuco\u00a1rt Cntp siliconchip,com.au","!iG ' Bird Brooder bTensNibble = bDecimal \/ 10 bUnitNibble = bDecimal \/\/ 10 \u00ec ' b0 is the temp value from DS18820 ' b4 is the current temperature let pins = b1 1+48+b7 'dislay 2 to be latched ' b5 is the desired temperature ' b6 is the displayed temperature low 4 ' b7 is used to allow peltier to continue through the display routine high 4 ' b1 1 is used by the display routine ' b12 is used by the display routine let pins = b12+48+b7 'display 1 to be latched low 5 high 5 return initial: 'sets th\u00ea initial desired temp switchup: b5 = 30 marn: if b5 = 45 then switchcheck 'won't allow countup beyond 45 gosub temp let b6=b5 gosub action gosub display gosub display gosub switchcheck goto main pause 300 bb56==bb55+f let increment one per subroutine let 'let the desired temp be the displayed temp displaygosub 'display incremented value pause 300 temp: goto switchcheck pause 1000 readtemp 2,b0 switchdown: pause 1000 if b5 = 0 then switchcheck 'won't allow countdown below 0 let b6=b5 if b0 >127 then undertemp if b0 >45 then overtemp gosub display b4=b0 'make the calculated temp the current temp pause 300 bb56==bb55-1 b6=b4 'make the current temp the displayed lemp let 'decrement one per subroutine let 'let the desired temp be the displayed temp return displaygosub 'display decremented value undertemp: pause 300 b4=00 'if temp is below zero than make zero goto switchcheck b6=b4 'use this value for display purposes return peltiercold: low 7 overtemp: 'if temp is above 45 degree's than make 45 pause 100 'ensure the heat is off before 'use this value for display purposes high 6 b4=45 let b7=64 'iurn on cool b6=b4 return 'used to keep pin high during display routine return action: peltierhot: 'ensure the cool is off before if b4<b5:then peltierhot if b4>b5 then peltiercold low 6 'turn on heat if b4=b5 then peltiernil pause 100 'used to keep pin high during display routin return high 7 lelbT=128 return switchcheck: 'pin normally pulled high peltiernil: 'ensure cool is off 'pin normally pulled high low 6 'ensure heat is off if pinO = 0 then switchdown pause 100 'used to keep pin low during display routine if pinT = 0 then switchup low 7 return pause 100 let b7=0 display: return symbol bDecimal = b6 symbol bTensNibble = b11 symbol bUnitNibble = b12 the OUTa and OUTS port bits. iNO &IN7. The switchinputs arenor- The Peltier module is driven The desired temperature is set mally pulled high via 1k\u00c7) resistors, with four power MOSFETs (Qs-QB) arranged in a classic H-bridge con- with pushbutton switches 51 & 52, so if either 5L or 52 is pressed, the respective line is pulled low. continued on page 65 which are connected to port inputs siliconchip.com.aLt OcroBEn 2005 63","34 7 DISP2 3 1 r\u00f3 ^Ii. S5 ER l3 )o l1 H+\u00f3V 12 l0 I UNITS DISPI 11 l( t0 I \\\"l: 47k 5 I l( \u00c7 F l5 T 2 8,3 \u00c1 lz 2 6 D3 \u00c1, 4 't0 I t0 t3 -[--ou 9 fl 22k 22k :_ D1-D4:'lN4l48 I OnF 100\u00e7\u00bf D1 significant bits of the tens counter 6 (IC2) back to the parallel load (PL) 3 tA inputs via diodes D3 & D4, s2 .r\u00c4 \u00e9,'\u00bfza The display count can be incre- 2.2uF mented or decremented (depending A on the position of Sa) by pressing l r\u00f3V switch 51, which generates a nega- tive-going pulse at the trigger input Electronic display instead of physical objects. of the 555, With the timer now in Nim game monostable mode, a single 110ms The displays are drivenby4511 de- (approx.l positive pulse is generated Nim is a two-player game of for each switch press, clocking the coders\/drivers, which receive their counters and sounding the piezo strategy in which players take turns I\u00a1tzzet. removing objects fiom a heap (tra- data fiom two 4029 counters. ditionally pebbles or matches). The People with a mathematical bent Initially, up or down counting cal work out a winning strategy and players must take between one and then show off by playing the game mode is selected with toggle switch an agreed-upon maximum number by ear - once they know the starting 54. The display is then cleared by of obl'ects per turn, The player left to pressing switch 53, which loads number on the display! A. f. Lowe, pick up the last item is the loser. both counters (IC2 & ICa) with Bardon, Qld. ($45) Many variations on this basic set zeto. of rules can be applied. For exam- ple, the last to pick up could be the To get a random number of winner, or the heap could be built \\\"objects\\\" (ie, a random count) at up rather than dismantled, with the start of the game, switch 52 is the last to place an object being the pressed. This places the 555 timer winner - or loser! (IC1) into astable (free-running) Here's an electronic version of mode and causes it to produce a the game that supports all four of rapid train of pulses at the clock (CP) inputs of the two counters. these va\u00a1iations, using a 2-digit LED A value of 39 was chosen as the maximum count, which is enforced by the connection of two most Sntco\u00a1rt Cutp siliconchip.com.au","+15-30V 1M004 PIGAXE-controlled bird broodel. . . from page 63 fi guration. Four small-signal transistors (Q1-Q4) ievel-shift the 5V logic outputs from the PICAXE in order to switch 12V D2 10.8v at the gates of the MOSFETs. 1 N\u00bfI48 When both outputs (OUT6 & OUTT) BANERY zll\u00dev1 (9 cellsl from the micro are low, the Peltier mod- 1W ule is off. If OUT6 is programmed high, Q1 conducts, pulling tlre gate of the MOSFET (Qs) towards ground. Being a P-channel type, the MOSFET switches on, connecting the positive (+12V) rail to one side of the Peltier module, On ttre other side of the bridge, the Trickle charger of'D1 increase above the forward Iow voltage on the collector of Qt also uses optocoupler causes Q2 to conduct, which in turn voltage of the LED in the opto- drives the gate of Q6 high. Being This noveL NiCd\/NiMH battery N-channel MOSFET, an coupler plus the reverse voltage it switches on, charger provides a constant charging of the zener diode (about 12.5V in total), the LED will illuminate, completing a current path to ground for current and over-voltage protection using little more than a Darlington causing the optocoupler transistor the Peltier module. transistor and an optocoupler. to saturate. This pulls the base of Q1 Thus, if OUTT were low rather than When the voltage drop across towards ground, switching it off. OIJI6, the polarity of the voltage applied the 27o- resistor (R1) equals the base-emitter forward voltage of Note that Q1 mustbe ahigh-gain to the Peltier device would be reversed, optocoupler plus the forward volt- Darlington transistor due to the low current handling capabilities of causing cooling, rather than heatiag (or age of D2 (about 1.2V \u00edn total), the the optocoupler. D1 prevents the optocoupler transistor conducts, battery Irom discharging through vice-versa, depending on how the Peltier This reduces the base current ofthe OPTO1 e ZDL. Both current arrd device is connected). series pass transistor (Qr), thereby voltage levels can be altered by Of course, OUT6 & OUTT mustnever maintaining the collector current at changing the values of R1 and the about 44mA (1.2V127A = 44mA). be programmed to be high at the same zener diode. Should the voltage on the anode time. Doing so will short-circuit the Chris Baker, supply rail and may destroy the MOS- via email. ($+o) FETs! Temperature in the Esky is sensed with a DS1BB20 digital temperature sensor. The PICAXE prolram con- tinually monitors the temperature and compares it with the user-programmed value to determine if heating or cooling is required. The prototype was constructed in t\u00ecree parts. A display board carries the two pushbutton switches, 7-segment LED displays and drivers; a power controlboard carries the H-bridge MOS- FETs and related switching logic; and a main board carries the PICAXE-1BX and power supply circuit\u00a1r. Connection I between the display and main boards is accomplished with a short length of 10-way ribbon cable. As you can see, we pay good money Thyristor & Triac Analyser, with the The circuit requires a hefty 1.2V DC for each of the \\\"Circuit Notebook\\\" items published in Srucor,\u00a1 CHrp. But now there compliments of Peak Eleclronic Design power soruce. This could be supplied are four more reasons to send in your Ltd www.peakelec.co.uk circuit idea. Each month, the best contri- from a car battery or heavy-duty mains bution published will entitle the author to So now you have even more reasons adaptor, with the rating dependant on choose the prize: an LCR40 LCB meter, to send that brilliant circuit in. Send it I the requirements of the Peltier module. a DCA55 Semiconductor Component to SrLrcoN CHrp and you could be a I I Alternatively, a supply could be built Analyser, an ESR60 Equivalent Series wtnner. using a gVAC mains transformer and \u00a1 Resistance Analyser or an SCR100 You can either email your idea to diode bridge of appropriate ratings. I siliconchip.com.au silchip @siliconchip.com.au or post it to David Crowley, PO Box 139, Collaroy, NSW 2097. Toowoomba, Qld. rr-- OCT)BER 2OO5 65","The courts are full of people who thought they were fit to drive after having \\\"a couple of drinks\\\". This simple little project will give you a good ihdication of alcohol on your breath - and tthoemreafokereth_yeoruirgbhltood \u00e1lcohol concentration (BAC). It's up to you then decision and get a cab home instead! -ff vou drive when under lhe in- Therefore it must not be used to make Furthermore, this particular PC board I fllr\\\"n\\\"\\\" of even'a small amount the decision to drive or not to drive has been designed for more than one lof alcohol it is certain that your based on an \\\"under .05\\\" or \\\"over ,05\\\" project - it has already served us in driving will be impaired. reading. Our advice would be - if you the recent \\\"Bilge Sniffer\\\" (September Reaction times will be extended and drink, don't drive! 2oo5). while you may feel confident to drive, Our Alcohol Level Meter The sensor arything that occurs requiring a judge- Housed in a small ABS case, the The alcohol sensor itself, which ment decision may lead to disastrous circuit consists of a proprietary al- protrudes through the case lid so that consequences. For Learner and Provisional drivers cohol sensor which drives a 10-LED it can be blown into, is encapsulated in NSW at least, there is virtually zero bargraph display. The higher the pro- in a plastic button-shaped housing tolerance for having any bloo d alcohol portion of alcohol sensed, the higher with a stainless steel mesh covering levels. With this in mind, being able the display reads. over thq open end. to detect small amounts of al- Inside is a heater that is cohol on your breath would Warning used to heat up an aluminium be quite useful. oxide ceramic tube, itself The SucoN CHIp Alcohol carliTeblhrieaistdeAd0lncbotl0hooogldivLaeelvcaeonlhMoolveerteer-artdhdieon-eqlismannitodtwcgaairvnneninoagt 'be coated with a tin dioxide sen- Level Meter can be used sitive layer. Resistance across to detect and display the the electrodes attached to presence of alcohol on your the sensitive layer decreases breath, And it operates with with \u00a1nc\u00a1easrng alcohol con- sufficient sensitivity to detect centration - that is, it is an blood alcohol levels below the Don't be concerned about the rela- inverse relationship. tively small number of components on The chalge in resistance from the critical 0,05 % concentration, the PC board, nor the large number of Before we go any further, though, unused holes. This simple level meter sensor is converted to a voltage by a doesn't need any more components. resistive voltage divider across the let's get one thing straight: this unit does not and can notreplace the highly supplyvoltage, This is then displayed calibrated devices used by the Police, using the LED bargraph, controlled by 66 StLtcoN Cutp siliconchip.com.au","by fohn Clarke Alcohol Levef The Alcohol Level Meter mounted inside its case, fitted with a suitable length offigure-B cable and a cigarette lighter plug. Keep it in the glovebox - just in case! an LM3914 bargraph display driver. Here's what is inside the box: not much to it, is there? The alcohol sensor itself Fig.1 shows the internal arrange- is on the bottom left, mounted high on PC stakes and wires so that it can peek through the case lid. The LED display is also mounted at the same height. ment of the LM3914. It comprises 10- comparators that monitor the voltage OcroBER 2oo5 67 applied to pin 5. The comparator's positive inputs are connected to to series-connected resistors between the RL6 and RH1 inputs. The idea is to connect the RH1 input to a voltage source and RL6 either to ground or a raised voltage if you wish to measure a range of voltage that starts above ground. The resistor string sets each compa- rator input at a different voltage. So for example, if RH1 is at 1V then the lower comparator will have 100mV at its positive input. The second compa- rator will have 200mV and so on until the top-mosi comparator will have the full rV at its positive input. As the input voltage at pin 5 goes above the 100mV level, then LEDl will light. Above 200mV LEDz will light and above 300mV LED3 will \u00ccight. This sequence wi\u00ccl continue, with LED l0lighiing when pin 5 is at 1V. RHJ can be set to a voltage using siliconchip,com,au","LVt3914 operates in bar mode where the lower LEDs remain lit. REFERENCE The circuit VOITAGE SOURCE The circuit for the Alcohol Level Meter is shown in Fig,2. There is not 1.25V too much to the circuit, with IC1 used to drive the LEDs as described above BAR,\/DOT and the voltage fiom the alcohol sen- SEIECT sor applied to pin 5, ' Rl+ R2 DEIERIVIINE t\u00a1D BRIGHTNESS One of the electrodes from the sen- sor connects to the 5V supply and the Fig.l: inside (and outside) the LM39 14 LED bargraph driver. Its sole purpose other to the VR1 calibration resistor is to drive a string ofLEDs according to the level ofthe input signal. and series 100kQ resistor. In opera- the 1.25V internal voltage reference Voltage at pin B is therefore 463p4 tion, the sensor electrodes present a provided between pins 7 and B. The x 3.9kO or 1.8V. ,{dding this 1,BV to certain resistance at various alcohol resistor placed between pin 7 and the 1.25V reference, we obtain 3.06V at pin 6. concentrations and this resistance pin B sets the brightness of the LEDs. LED current through each LED will be Therefore, our comparator resistive sets a voltage due to the divider action approximately 10 times the current of VR1 and the 100k\u00e7\u00bf resistor, Typi- that flows through R1. This current string is set to operate over a nominal cally, the voltage is around 2V at the also determines the voltage at pin now-standard 0.05% blood alcohol 3.06V and with about 300mV divi- concentration, 7 because it determines the voltage sions between comparators. The sensor is heated via the 5V sup- produced across R2. Pin 9 of the LM3914 sets the LED ply passing current through the heater We set R1 at 2.7kA so that a mode to either dot or bar mode. It coil. The coil has a 33fl resistance and L.2512.7ko. or 463\u00a1rA current flows can be left open so that the LEDs light up individually, with the lower so cunent draw is around 150mrt, through R1. LED current is therefore LED switching off as the higher LED Combine this with the LED current around 4.6m\u00c2, The 463\u00a1r\\\"A also flows switches qn (dot mode). If pin I is of up to around 50mA (in bar mode) and there is a current requirement of through R2 (3.9kO in our circuitJ, connected to pin 3, then the display up to 200m4. So battery operation is not a good idea. 68 Stuco\u00a1rt Cntp Power for the circuit is provided from a 12V supply. This can be foom a car's cigarette lighter socket, a'1.2Y bench supply or a 12VDC 500m4 plugpack. The supply is reverse po- larity protected using diode D1 and protected fiom transient voltages us- ing a series 10C) resistor and the 16V zener diode, ZD1. The 100\u00a1rF capacitor filters the incoming voltage. REG1 regulates the voltage down to 5V for the sensor and IC1 supply. Two 1OuF decoupling capacitors are included for the output of REG1 and the LM3914, Construction The \u00c2lcohol Level Meter is con- structed onto a PC board coded 05109051 a\u00a1rd measuringL23 x 6Omm. This is housed into a plastic UB3 box measuring 130 x 67 x 44mm. The board is held in place on indents in the side wall guides - no screws are used. For this reason, the corners of the PC board have to be shaped [\\\"con- caved\\\") so that the PC board can fit into the box. Power is connected via a figure-B lead that either attaches to a cigarette lighter plug or a DC line socket. Begin construction by checking the siliconchip.com.au","PC board for any defects. DI I N\u00bf004 +l2Y Solder in the resistors first, making t^9? r sure the correct value is placed in the shown position. You ca\u00a1r use the ac- z'lD\u00f3vl companying resistor colour code table \u00bf\u00efI-{ 0V to check values or use a multimeter. When installing the regulator and IC, \u20ac tN\u00bf004 TTDI O \u20acF ITD9 make sure they are oriented correctly. f: IIDS A heatsink attaches to the regulator AK l\u00cdD7 using an M3 x 10mm screw and nut, tTD\u00f3 zD1 The heatsink flanges protrude toward I.ED5 2.7k the edge of the PC board. t\u00ccD4 When mounting the electrolytic ca- tTD3 tTD2 pacitors and diodes, these too must be IEDI oriented with the correct polarity - re- UNK FOR .BAR\\\" DISPLAY; fer to the overlay diagram. Terminals for the power connection and trimpot OPEN FOR (VR1) can also be installed now. \\\"DOT DISPLAY The sensor itself can be mounted either way around, as the pin connec- -_m, Atc0ll0t LEUET ilEIIR tions are symmetrica\u00cc. It is mounted so that the top of the sensor is 30mm Fig,2: it's easy to build because there is so little in it, But it does a good job at above the PC board, on PC stakes and detecting the amount of alcohol on your breath. lengths of tinned copper wire (resistor connect to a source of 12V DC. Level Meter and adjust VR1 so that lead offcuts are ideal). The LED bargraph has long leads Testing all the LEDs \u00ccight up. If you cannot see the LEDs light, check that the and ca\u00a1 mount directly on the PC Connect power to the A\u00cccoho\u00cc board with the top of the display also power supply polarity is correct. You at 30mm above the PC board. Drill a hole in the box lid for the sensor and make the rectangular slot for the LED display using a series of holes along the required area, filed to shape. AIso drill out a hole in the side of the box suitable for the wiring entry to the power screw connector. We used a length of figure-B wire and a cigareite lighter plug to supp\u00ccy power. Alternatively, a DC line socket could be mounted on the side of the case and either a plugpack (for mains operation) or a power lead fitted with a matching DC plug could be used to BAG versus weight for WOMEN BAC versus weight for MEN Weinhf No. of 55kg 65kg 75kg 80kg 90k9. 1 00kg 110k9 drinks in 45kg 04 04 03 03 03 02 02 05 08 07 0\u00f4 06 13 10 08 05 05 04 2 10 17 11 4a 3 'ts 21 '15 11 08 07 06 26 16 20 30 18 19 t4 1U 09 09 33 22 22 ^5 25 38 26 26 17 l3 2 11 42 29 29 20 l5 4 3 6 30 46 33 32 23 7 Jf) 50 36 26 1E 6 5 55 40 'E 28 20 o I 41 59 43 37 31 7 63 47 40 33 23 21 c 46 51 43 36 I tn 55 4b 39 42 25 23 21 56 1? oi 27 25 23 .t1 66 30 28 25 14 71 15 76 32 3(J 27 35 aa 2S 37 ac 32 siliconchip.com.au OCT)BER 2OO5 6S","should have 5V at the output of REG1 with respect to the ground, This 5V should also be at pin 3 of IC1, Check that pin B of IC1 is around +12Y .\u00efilS'F,\u00e5\\\" ov 1.BV and pins 6 & 7 are at | \/rout\u00c7l rcr r\u00a1,rg\u00e7r\u00bf around 3.1V. + ETTT-\u00db.t-ffiar- Before further use, the Fig.3: construction should be a breeze with this overlay diagram and the photo below Note the dot\/bar link pads (immediate bottom right of the IC). You should meter should be left powered up for short these pads ifyou want a bargraph; leave them open for a dot display. about 24 hours. This a\u00cclows the heater inside the alcohol sensor to burn off impurities that may have coliected on the sensing element during manufac- ture and while in storage. In fact, one of the lower green LEDs wiil probably remain lit for some time unti\u00cc the sen- sor has purged offsufficient impurities to raise the sensor resistance. The sensor can be tested after a few minutes of purging by waving an open bottle of methylated spirits over the sensor. Since methylated spirits is virtually pure ethanol (ar alcohoi), the display should immediately light the top red LED. Never drink methylated spirits, as the added methyl alcohol is poisonous, Calibration The Alcohol. Level Meter is cali- brated by adjusting VR1 when the sensor is exposed to a concentration You can get your c0py 0f SlL|CoN CHIP 6ooI every month from your newsagenl: in most it's on sale on the last Wednesday of oE the month prior to cover date. You can ask y0ur newsagent to reserve your c0py for zU\u00edtI you. lf they do not have SlLlc0N CHIP or it has run out, ask them to contact Network Uvoi Distribution Company in your state. mosroeosl SlLlCoN CHIP is also on sale in all Fig.4: same-sizePC board pattern for those who wish to make their own boards. D|EKAs-iliI\u00cfF \u00c5\u00a1T Resistor Golour Godes (1%)No. Value 4-band Code ffi'8\u00c9r 5-band Code (1%) tr 1 100ko brown black yellow brown brown black black orange brown stores . . . again, you can ask the store tr 1 brown3.9kO orange white red manager to reserve a copy for you. tr 1 brown2.7ko red violet red orange white black brown brown 0r, to be sure that y0u never miss an issue tr 1 brown1kO brown black red red violet black brown brown and save money inlo the bargain, why not tr 1 brown10O brown black black brown black black brown brown take out a subscription? The annual cost is iust $83 within Australia brown black black gold brown or $89 (by airmail) to New Zealand. siliconchip.com.au Subscribers also get furlher discounls on books, and other products we sell. StLtco\u00a1rt Crutp","Why does it work? and absorbing it into the bloodstream. actually increased it! But if there is alcohol in the blood- How does measuring the amount . Fresh breath mints (no effect) of alcohol on the breath determine stream, it is just as happy about going . Mouthwash (increased the read- the amount of alcohol in the blood- stream? lt's all tied up with the way the other way - that is, some passes ing, probably due to the alcohol it the body obtains oxygen from the air in the lungs. through the alveoli and evaporates .contains) Hyperventilation (either no change Once drunk (no pun intended), alco- into the air in the lungs. lt's not a huge hol is absorbed into the bloodstream amount (othenruise the lungs would fill .or increased the reading) over the next 1 5-20 minutes (it actually up with alcohol!)-the ratio of alcoholon Placing a battery in the mouth (!) dissolves in the water of the blood) via the breath to alcohol in the bloodstream the stomach and small intestine-and is a relatively constant 2100:1. .- no change it is neither digested (ie, like a food) nor chemically changed. The alcohol But even this tiny amount can be Eating a raw onion (nochange-ex- is carried by the blood and pumped around the body by the heart. measured and gives a reliable indication cept for the breath of the eater!) All of this blood must pass through of blood alcohol level. . Denture cream (no change) . Placing copper coins in the mouth the lungs to be replenished with There are many common myths about (dare we say it - no change for small oxygen. the ability to \\\"mask\\\" or reduce the alco- Here, literally millions of tiny blood- hol in the breath so that you will not fail change!) laden vessels, called alveoli, are re- a breath analysis. You might like to check some of sponsible for grabbing passing oxygen The popular TV show \\\"Mythbusters\\\" these out (and other \\\"sure-fire\\\" meth- recently busted all of the following wide ods you might hear about) with your open - nothing decreased the amount own Stucoru Curp Alcohol Level Meter (nottoo sure aboutthe battery orcoins of breath alcohol detected and some in the mouth, though . . .) of alcohol in air. Calibration is not Blow into the alcohol sensor and -Pafis List accurate and we suggest you read the adjust VR1 so that the red LED just Alcohol level Meter accompanying warning panel. lights. This calibrates approximately You can calibrate the meter by to the 0.05% level. However, actual drinking \\\"standard drinks\\\" as shown in the accompanying tables. You will levels really depend on many factors 1 PC board coded 05090051, 123 x 60mm need to drink sufficient standard including how much food is also drinks in one hour in order to raise 1 UB3 box, 130 x67 x44mm present in the stomach at the time of 1 MQ-3 alcoholfume sensor the blood alcohol level to 0.05% or close to it. F'or example if you are an drinking. It is also true that this level (Jaycar R5-5605) (Sensor 1) B0kg man then you will need to drink of alcohol will have vastly different 1 cigarette lighter plug 1 mini heatsink, 19 x 19 x 1Omm two standard drinks in a\u00a1 hour to raise effects between individuals. 12-way PC mount screw terminal your blood alcohol level to 0,05%. Blood Alcohol Level (or BAL) (also block A standard drink includes a middy 1 M3 x 1Omm screw and nut known as Blood ,\\\\lcohol Concentra- 6 PC stakes (3Bsml) of full-strength beer or a 200m1 1 200mm length of light-duty tion, BAC) is the amount of alcohol nip of spirits. You should wait about figure-8 polarised wire 15 minutes after the hour's drinking present in the blood and is calculated 1 150mm length of 0.8mm tinned to ensure the alcohol has entered the by determining how many mi\u00ccligrams copper wire bloodstream, By this time, the alcohol of alcohol are present in 100m1 of Semiconductors 1 1M3914 1O-LED bargraph dis- will also be present on your breath. blood. The tables earlier in this article play driver (lC1) show the expected BAL from a person 1 7805 5V regulator (REG1) 1 1O-LED bargraph (LED1-LED10) who metabolises or breaks down one 1 1N400414 diode (D1) standa\u00a1d drink per hour. 1 16V 1W zener diode (ZD1) SC Capacitors The assembled PC 1 100pF 16V electrolytic board mounts in 2 1O\u00a1tF 1 6V electrolytic the box by clicking Resistors (0.25W, 1%) it into the indents 1 100ko in the vertical 12.7kA guides, moulded 1 10O 1\/2W in the sides of the 1 500kO horizontal trimpot case, This puts the (code 504) (VR1) PC board 30mm below the case lid height - co- incidentally the same height we mount both the alcohol sensor and the LEDs. siliconchip.com.a.J OCTOBER 2OO5 77","MelbOgfne 2OOSGatalogue Super-store OUT NOW! Have you got your FREE copy? Opening lf not, then you can pick one up from our stores, phone 891 Princes Hwy, Springvale Earty October 1300797 007 or register on-[ine at www.altronics.com.au See web for more detsils. Store at[ your Handhetd Digitat ! :@ \\\",?,\\\\::::i: !,,::^\u00ce:l'\\\"\\\"il Hi:f :: favourite movies, Storage Oscilloscope 7 fhese handy watl mount LCD brackets attow . ,o music & photos in Combines the functionality of many you to reclaim your desk space & allow one convenient box! h\u00a1gh tech pieces of equ\u00a1pment \u00a1n one . greater adjustability than most standard compact hand heLd device It incorpo- r Simpty by adding a hard mon\u00a1tor brackets. AvaitabLe in dr\u00a1ve to th\u00ecs stylish unit rates a 5MHz digitaI storage oscitto- ;r' extendible and fixed a creates a totaLty portable scope, true Rl\\\\4S autoranging muLti- types Great for the mutt\u00a1media sotution for your meter, Logic anatyser, frequency & home without the expense of ..'.\u00bf study, k\u00a1tchen, bedroom, a futt hi{i PC Provides function generator. AlI measurements high quaLity audio and can be printed to an externat thermaI video playback for any printer v\u00a1a the \u00a1nbu\u00a1lt R5232 port files stored on the dr\u00a1ve Supplied complete w\u00a1th test leads, rechargeable battery pack, scope Su\u00a1tabte for most Can be directty connected to probe, temperature probe, AC MPG formats, Divx' your PC network provid\u00ecng adaptor, carry case and holster. an easy way to update and JPG, MP3 and morel add to your media library. .Specs: SMHz bandw\u00a1dth .25ms sam- Store your entire DVD [ibrary in th\u00a1s compact pling rate. Dual mode vollage & $\u00a1ave \u00fanit! Features: . S-video component & shape display . 1.3GHz hequency genera- tor . True RMS AC voltage to 700V @ 204 composite video ' CoaxiaI or opt\u00a1caI aud\u00cco . DC voltage to 1000V @ 204 . Temperature to USB\/LAN . D 5520 160cb HDD to suit $199 1200\\\"C . 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Software, temp probe, PC interfac\u00e8 teads included learn\u00a1ng function A professional grade remote - . Supplied with adjustable mounting Pocket Audio Signal bracket & remote control . Runs off Generator control for the entry level home theatre system. 12V, easy to setup and install! . Slimtine design A must have piece o\u00cd test equ\u00a1p- ment |or techn\u00a1cians, mobile with stytish blue Monitor your circulatory \u00a1nstallers, engineers etc. This backlit LCD screen! highty usefut compact tester gener- d\u00a1astotic pressures and ates s\u00a1ne and square waveforms in Extend the range of your rate- Provides a s\u00a1mpte way to 46 preset frequencies from 20Hz to remote contro[! get fast and accurate blood pressure i50kHz in hvo ranges (x1 and x100) readlngs. Stores 30 readings for up to 3 \u00a1ndiv\u00a1duals. Crammed with features for the pro- This stytish un\u00a1t Monitor your health at home w\u00a1th ease- fessionaI and enthus\u00a1- relays the signal from ast a[\u00a1ke lncludes tesl your remote back to Keep your pool or f\u00a1sh High accuracy leads and oscitlo- your hi-fi so you can pocket scales scope sync output sit around the BBQ thls summer with the fult power of your hi-fi Detect tethat AC voltages without contact at your fingert\u00a1ps! Range up to l00m tine of sight. 30m through w\u00bftts Add extra Non-contact pocket s\u00a1zed AC detector w\u00a1th AV inputs LED \u00cdloshlight, An essent\u00a1aL for anyone oper- to your TV ating with AC wiring or transformers. Lights up This tiny AV switcher A must have tool for electr\u00a1cal lradespeople or provides 3 additionaI inputs for devices enthusiasts building mains powered kits. such as game consoles, DVD, VCR etc. RCA & S-Video connections. 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Don't fumble around \u00a1n tight spots with a ma\u00a1ns Power your soldering iron, th\u00a1s tiny yet powerfuL gas iron witl do the job \u00a1n a jiffyl Great for auto-etectric\u00a1ans, laptop on the enthusiasts or home handypersons road! (tzv lnpu\u00d0 .Also available as a kit, including: . Ptast\u00ecc carry torch t\u00a1p Hot a\u00a1r Simpty plugs into your cars accessory socket and provides benchtop or Iob power supply delivers . Sponge power to a taptop Selectabte powering communications equipment, car up to o whopp\u00a1ng 154 reguloted output, Keyring Blowtorch output vottages 15, 16, 18, 19, audio amptifiers, camping fridges or other 20,22 and 24VDC, up to 3.5A portabte DC power appliances. Adjustable odjustoble between 9 ond 16V. lts greot Produces a powerful jet (regulated). Supptied with 6 3 to 30V regulated output @ 20Amax. adaptors to suit most taptops fo r p owe ri ng com mu n icot\u00a1o ns . like ftame! Great for \u00e1-rf\u00d0-e qu i p me nt, sco n ne rs, portoble d ev ices camping, hiking or even as a cigar Lighter! or ony DC voltoge sensitive oppl\u00a1once. Express Order Hotlines . adjustabte flame. refiLtabte Phone l3OO 797 AO7 Fax 1300 789 777 www.altronics.com.au gas chamber . one ctick p\u00ccezo ignition . sturdy metat construction . 12 month waranty.","s400 1 Farad Super Cap 3 in 1 lnverters: UP T0 A HUGE R 4996 Provides backup power for 6000 WATTS OF POWER! NEW! circuits with inbuitt memory chips. . PURE SINEWAVE INVERTEF - SOLAF BEGUljTOB - INTELTIGEITTT EAT\u00cdERY CHARGER sf 50 ea High current DC Great for prolects, experiment\u00a1ng etc. 196 characters are in-built into An incredibte breakthrough in technolory! P 7806 Blk Designed for automo- the modutes memory Size: Combining a pure s\u00a1ne wave inverter, battery NEW! t\u00a1ve and \u00a1ndustrial 88W x \u00bfl4H x 9D mm. charger and solar regulator plus an automat\u00a1c appt\u00a1cal\u00a1ons. Ct\u00a1p together Multi Cotour AC changeover switch - att in one un\u00a1t- Boast\u00a1ng to form multipole connec- tors for wiring looms. 304 LEDs a massive 6000 Watts peak power (24V modet) to 7 colour LED's for handte the most difficutt of loads! With the addit\u00a1on of batter\u00a1es afor s30 and\/or a solar panel array, this unit w\u00a1tl form a complete colourfut projects! | atternative power system Add an atternat\u00a1ve AC source (eg. backup generator or electricity Available in 3 inter- | grid) and un\u00a1nterrupted power witt be at your d\u00a1sposal. Great for any fixed or mobile application. M 8154 remote controt to suit $139. M 8098 battery temperature sensor $99- val t\u00a1mes, ftashing I red, green, blue, Equipped with except\u00a1onal features 1\u00a1ke; auto-start \/ auto power-save, auto load switching between alternative power and inverter, auto battery charging via both solar and or generator, fulty isotated input & ou\u00feut, plus many more functions - too many to list here! z 0194 & yeltow. Z 0985: 0.24sec. RRP $8.95 ea Z O986:2 sec. Z 0987: 35 sec. Attention Audiophiles! Altronics are now stocklsts of quallty Electroharmonix audio valves. Build yoursetf an ampl\u00a1f\u00a1er w\u00a1th some \\\"old school' charm. Vatve amptifiers are reknowned for their dynamic range and audio -. performance, and are enloying a rev\u00a1val amongst audio enthus\u00a1asts. 1up Z t39O:12AX717025 dual t58500 Shr\u00c8 dc(l ,ro*, oO triode preamplifier valve. uuo' ,r\u00ef o,u,u' t5 no Z 1392: EL34\/6C47 power fcrBb(12 616 Rcra s4 50 pentode valve. '24 '35 '39 Z 1394:616\/5881 power s4 50 tetrode. Made to the specs of z 1390 z 13SZ z 1394 6t6 P 8503 EL34 BeL\u00bfrner the famous Mullard valve. 12N11 Et34 10 rolts of hook up w\u00a1re for $50! orange, yellow, green, btue, wh\u00a1te, grey, purple. Awesome split Recreate system c\u00a1nema sound in your lounge sound for your car! WITH THIS ACTIVE SUBWOOFER! This 6.5\\\" 100W This fantastic Thumping 35OW RMS rated 6x9\\\" 3 WaYs WHOPPER WIRE: 157o OFF! subwoofer witl add m\u00a1nd btow\u00a1ng realism lncredible sound output from a compact package, great for rear Oxygen free cabte for superior to your home theatre shelf instalts. [Jtil\u00a1ses an extra stiff cone design, long throw speaker performance Superb qual\u00a1ty system. Featuring a woofer. diecast frame and M0NSTER s\u00a1ze vented magnet. for use in hi-fi, home theatre and car 180W 10 inch driver Easily the most impress\u00a1ve sound\u00a1ng car audio audio systems. 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CASTLEl\\\\\u00a1AINE Star Elecironics 54705433 CLAYTON Bockby Eleclronics 95\u00f428559 C RANBOU RNE G&C Communrcations 59963298 C RESWICK lvlB Badio Suppl\u00eces 53452205 CROYOON Truscotts Electronics 97233860 DANDENONG Telecoms Pty Ltd 97933339 Mini USB Travel Mouse G EELONG Academy TV 52481621 HORSHA[\u00a1 Hobby N Tronix 53822319 With retractabte USB TEONGATHA Gardner Electronics 56622861 cord to keep yout [,4E\u00cd0N laptop case neat MILDU BA Tandy 97431233 and tidy! Benchmark Electronics 5021 0822 Electronics R Us 502307\u00f42 N UNAWADING Semlronics 98733555 TECS lmoorls 98777071 Hesdphone outqut too low? Solve \u00a1t w\u00a1th th\u00a1s s\u00a1mPle module! PACKENHA[.'l Get Smart Hi-Fi & Repairs 59414886 PRESToN your latest audio project HILLSWAN Preston Eleclronics 94840191 Laleral Communications 50322322 WODONGA Exact Elecl\u00a1onics 60565746 WoNTHAGGI Raneye Ply L|d56724774 USB 4 Way Hub ? NSW Leading Edge 63323189 SMATLER THAN A MATCHBOX! adjustability at 63H2,250H2, I BATHUBST Stytish & durabte alumin\u00edum finish. BROoKVALE BrookvaleElectrical993S4299 High speed USB 2.0. lnctudes ptug- 4kHz and l6kHz with t12dB boosVcut on DAPTo This filter allows pack for powering devices off the hub. each band- GUNNEoAH Vimcom Electronics 42625308 you to use your Requ\u00edres lsv suppty, (M 28551 $7.95). phone and ADSL \u00a1nternet on LITHGoW Protronics 674221 10 the same Line at the same Class A Ultra Low Distortion Amp Modute time! lt requires no power and I\u00a1IBANDA Leading Edge 63523333 can be installed \u00a1n just sec- onds, providing fittering for one Call Us Electronics 95427008 device eg: phone or fax NEWCASTLE WESI Henchman Producls 49654444 machine. ACA approved NORTH FICHI\\\\4OND CPT 45714699 PENFITH Penrith Light & Sourd 41222223 PoRT MACoUAFIE John Fettell Radio 6581 1341 SANS SoUCI Si\\\\\u00a1ITHFIELD Nrlarine Connect 95831710 Chanlronics 96097218 SYDNEY David Reid Eleclronics 92671385 WATERLoo Backup your Charge batteries on the WINDANG Herkes Eleclflcal 93193133 road or in the office. valuable [\u00a1ad Electronics 42977373 Simpty ptugs into a spare USB port mobile and charges 2 AA or AAA batteries at distort\u00a1on (typicalty WOLLONG0NG NelTlekElectronrcs42271620 once Can also be used with a Nokia O.@059\u00f3fHD). Superb WYoNG phone data t\u00ec carlmains charger for added portabit- frequehcy response from an Pr0 Disc Entertainmenl 43531100 easy to build modute. 15W RMS- Keyring s\u00a1m card ity Great for digitat camera users! Power supply module to suit K 5110 OLD backup unit. $26.95. KM5109 transformer $69.95. BRISBANE A handy way to keep Supplied with 4 x 2200mAh batteries Delsound PL 33978155 '20W Amp Modute Kit \u00a1a backup of your phone BoWEN HILLS Prime Eleclronic Comp 32527466 (SG Dec 20041 Extremety simple CAIRNS \u00ef \/ \\\\::::i', l\u00ec,l,'.'J.:',\u00ee :'3 Penlacom 403217'10 .\\\" PC sound system. 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Suitabte for G\u00a1rAlL ORDEBS Cl PO. Box 8350 Perth seated and vented enctosures it \u00a1s sure to Ptaystation or X-8ox supply an added boost to your h\u00a1-fi or home Business Centre, WA 6849 theatre. Supplied w\u00a1th a \u00a1iffy box case. system for up to 4 I-Sydney: 15 Short St, Auburn NSW 2144 ptayers or replace your worn out con- v\u00a1s\u00c1 trollers with new ones! x 3004 Both feature extra turbo -,.,D P32 171 fire buttons P ric es for I Sale ends October 31st 2OO5 the currenl run oul f\u00e6f -l All pr ces include NO RISK f4 dav money back 0uar\u00bf\u00cdtlee ll you are drssalrsf ed \\\\!rlh 0ul gocds lor \u00a1ny reason relurn lo our premrses wrlhrn 1\u00a1 days for a lull rcfund (less freighl \u00e2nd insurance See latest lransporl cosls) Relurncd ilcn\u00a1s musl be rn NEW condrlron with \u00a1ll packaging and rnslruclr0ns (l Allronrcs 2005 Whrlsl \u00e2ll possible care ls laken, calalogue lor freight rates Allronrcs lakes no rcsponsibrlrly lor \u00e2ny loss or damage hov\/soever caused sullercd L\u00ecy a reader wrlh respecl lo any m\u00fbller or lhrng referred to hereln","N GLARKE This Timer can run the fan in your bathroom wall switch. The fan then runs for as or toilet for a fixed time after you turn it on. long as the switch is Ieft on. Whe\u00a1 you This avoids having the fan run for hours if you flip the wall switch off, the fan will forget to turn it off. You can build it to operate then run for a preset period before it switches off automatically. in one of two modes - immediate or delayed. In the \\\"immediate\\\" mode, the fan is T TNLESS YOU CAN KEEP your This Fan Timer is housed in a plastic also switched on using the wall switch LJ windows open all the lime, you box which is installed near the fan, but in this case, the fan wiil then run really do need ceiling exhaust fans in usually in the ceiling. When you build your toilet and bat\u00ecroom to clear steam for a preset period before it switches off and odours. Good ventilation stops it, you can set the Timer for one of two automatically. If you need to run it for mould growing on the ceilings and modes of operation which we have a longer time, you flip the switch to its walls and minimises water condensa- called \\\"immediate\\\" and \\\"delayed\\\" other position to make the fan run for tion on the walls and windows if you the same preset period. Alternatively, are having a long, hot shower. modes. you can extend the fan running time by the same preset period, by flipping 76 SIUCON CHIP In the \\\"delayed\\\" mode, you switch the wall switch to its other position the fan in the normal way using the before the fan stops. If you do this, the fan timer will acknowledge the time extension by giving a short beep. siliconchip.com.au","In fact, you can do this twice, to slMTcft run the fan for three times the normal fol lbl preset period. Switching a third time turns the fan off. Fig.l(a) at left shows how the fan is normally connected, which Fi8.rtb) sh\u00f3ws how the Fa4 Timer is interposed between mains Active and the fan. Each mode has its advantages. The \\\"immediate\\\" mode has the advantage controller senses the selected mode WARNING ! that the fan switch does not need to be manually switched off. This mode is and the setting of the wall switch, This circuit is ditectly con' ideal for a household with children! operates the piezo transducer and drives the Triac gate for the preset nected to the mains and all Parts The \\\"delayed\\\" mode is more suited to people who want to run the fan as time, operate at 240VAC. As such, contact w\u00a1th Alt\u00a1Y part of the long as they are in the bathroom or Before discussing the circuit of circuit could result in serious toilet and who always remember to Fig.2, we need to demonstrate how manually switch off the fanwhenthey iniury or euen death! we derive the 5V supply to power the leave (letting it run for the preset time). timer circuitry, We have shown this D0 NOT operate this circuit Our choice would be to use the \\\"im- in simplifled form in Fig.3. In effect, we need to produce a 5V rail capable unless it is f ully enclosed in the mediate\\\" mode - that way you don't spec\u00a1fied ABS plastic case and of powering the PIC microcontroller D0 NOT touch any part of the have to remember to switch off! The preset running period can be and delivering several milliamps gate circuit while it is connected to selected from 20 seconds tp lo 22 current to the Triac. the mains. Since we onlyneed a fewmilliamps minutes. Depending on the room and A licensed electr\u00a1c\u00a1an must be of DC, we can derive this directly from used to connect this unit to fixed size of the exhaust fan, a setting of the 240VAC mains via the relatively electrical w\u00a1r\u00a1ng. around 5-10 minutes would usually high reactance of a 47OnF capacitor (C1) combined with a 1k\u00c7) 5W resistor its voltage is limitedby the 5.6V zener be selected. (R1). This means that there is very low diode ZD1. Subtract the 0.6V voltage power dissipated in the timer box. drop of diode D1 and this results in a Switch wiring supply voltage to the timer of 5V. The circuit works as follows. For Fig.1 shows the way the Fan Timer Note that the zener diode works connects to the fan and switch. Fig.1(a) positive half-cycles of the ? OVAC shows the normal fan wiring. The Neu- in two modes: limiting the voltage tral is permanently connected to one of mains voltage, a current i1 flows from the fan terminals while the Active side across the 470pF capacitor for posi- of the fan connects to the switch. the ,A.ctive through the 470pF capaci- Fig.r(b) shows the wiring when tor, diode D1, resistor R1 and capaci- the Fan Timer is installed, interposed tor C1. For negative half-cycles of the 24OVAC, a reverse current i2 flows via between t\u00ece mains Active and the C1, R1 and zener diode ZD1, fan. Note that the Fan Timer also So successive positive half-cycles requires Active and Neutral power charge up the 47O\u00a1t\\\"F capacitor until connections. Note that the fan switching in your o Fan runs for preset time period . Connects to standard fan wiring using original switch home mightbe more complex, depend- ing on whether the fan is wired in par- o Adjustable time period from 20 seconds to 22 minutes allel with ceiling lights or is separately . lmmediate timer start or delayed timer start (selected by single on-board switched. The fan might also be part of a fan\/heat\/light setup like an IXLTastic jumper link) or similar brand. . Up to three times period extension using immediate timer mode Which ever fan\/light setup you o Piezo sound indication for switch on and period extension have, the Fan Timer is installed in the OCTOBER 2OO5 77 ceiling cavity and you will need the services of a licensed electrician to \u00ccegally make the connections. As shornm in the photos, the Fan Timer is housed in a small plastic box and it incorporates screw terminals to allow the 24OVAC mains connections to be made. Circuit description Fig.2 shows the Fan Timer circuit which is based on a PICd6FBB micro- controller (IC1) and a sensitive-gate Triac. There is not much else: several diodes, a piezo transducer and a few resistors and capacitors. The micro- siliconchip.com.au","I l00nF = l@\u00a1rF t\u00f3v 1; D2 UF\u00bfOO3 \u00c170a rf,la L*^.' + tt$ WARNING: Atl- COMPONEMS AND WRING OPERATE AT 24OVMAINS POTEMIAL CONTACT lvlAY BE LE\u00efHALI NOIE: EARTH SYMBOT DOES NOT REPRESEM \u00c0 AINS EARIH, BUT CIRCUI COtvt\\\\4ON tr* tAlt It\u00ectER # zDl DI,D2 AK ____ {gt:-----------_ AK Fig.z: the circuit is based on a PIC16FBB microcontroller (IC1). This senses the selected mode and the setting of the wall switch, operates a piezo transducer and drives the gate of Triacl to turn on the fan for the preset time period. tive half-cycles and conducting as a ler IC1 does all the work, sensing when mode, waiting for a signal from its in- conventional diode for negative half- terrupt input at pin 6 (port RBO). The cycles. The derived 5V DC supply is the wall switch is operated, driving the wall switch provides that signal via a tied to the mains Active; ie, it floats at 2.2k\u00c72 resistor, with lhe 22\u00a1tF capaci- gate of the Triac to turn it on, driving tor providing filtering to \\\"debounce\\\" ?4DVAC and so is hazardous! the piezo transducer to produce an the switch signal and also make it less Now that we know how the circuit is audible beep (as mentioned above) sensitive to any interference signals picked up by the switch wiring. powered, it is somewhat easier to see and a few other functions which we how it works - see Fig.2. Microcontrol- will get to shortly. Normally, pin 6 is pu\u00ccled low by Most of the time, IC1 is in s\u00cceep its associated 10k\u00c7\u00bf resistor. However, when the wall switch is closed, to turn Fig.3: here's how the 5V DC rail is derived for the timer circuitry. The dashed lines (i1 and i2) indicate the direction ofcurrent flow on alternate on the fan, it pulls pin 6 high to +5V half cycles, with successive positive half-cycles charging the 470pF (aciually to the 240VAC Active line). capacitor. The voltage across this capacitor is limited to 5.6V by 2D1,, This causes the microcontroller to Subtract the o.6V across D1 and you get 5V DC. Note that this 5V DC rail wake up and begins its timing func- \\\"floats\\\" at 240VAC. tion for the fan, 7B StLtco\u00a1tt Cutp After the preset time, the microcon- troller revetts to sleep mode, waiting for the next throw of the switch. Five outputs of IC1 (ports RB1- RB6) are paralleled to drive the gate of Triacl via a 470C) resistor and fast diode D2, The resistor limits the gate current to around 7mA when the five port outputs go low to pul\u00cc current out of the gate of the Triac to turn it on to run the fan. A snubber network comprising a 47nF Z5}YAC capacitor and 1kQ tW siliconchip.com.au","Farts L[st This circuit does not use a crystal oscil\u00ccator but instead relies on an in- 1 PC board, code 101 10051, 89 x 1 BTA08-600TW 8A 600V SmA ternal oscillator inside IC1, running 81mm at about 4ly'rlHz, The 1.5MQ resistor logic drive Triac (TRlACl ) - do and 4.7nF capacitor at pi.n 2 of IC1, 1 sealed lP65 ABS box, 115 x 90 x a\u00cclo-\u00a1, the microcontroller to detect 55mm (Jaycar Cat. H8-6126) not substitute the phase of the mains waveform, so 'l 5.6V 1W zener diode (ZD1) the fan can be switched on and off at 1 4-way PC-mount terminal barrier 1 '1N4007 1A 1000V diode (D1) the zero crossing point of the 240VAC with cover, 9.Smm pitch (Jaycar Cat. HM-3162) 'l UF4003 fast recovery diode (D2) sinewave. Note that the 1. SMQ resistor is a Philips VR25 high-voltage type, 1 low-profile piezo transducer (Jay- Capacitors specified because it has the full mains car Cat. A8-3440) 1 47)\u00a1tF 16V PC electrolytic voltage applied to it at all times. 4 M4 x 1Omm screws 1 100pF 16V PC electrolytic Pin 4 is a brownout input, Should 2 M4 x 1Smm screws 2lt(2 x 1Omm screws 122\u00a1t\\\"F 16V PC electrolytic the suppiy drop below about 4V the IC 6 M2 nuts 1 470nF 250VAC class X2 will be held reset until the voltage rises 1 2-way pin header (2.54mm) back above 4V. This brownout reset 1 jumper shunt (JP1) metallised polyester 2 PC stakes 1 100nF MKT polyester ensures that the micro\u00c7ontroller will 'l 25mm length of 0.8mm tinned 1 47nF 250VAC class X2 operate correctly after any brownout copper wrre metallised polyester 1 1OkO (code 103) horizontaltrim- 1 4.7nF MKT polyester condition has ended. pot (vR1) Besistors (0.25W, 1%) Linking options Semiconductols 'l 1.5MO VR25 (ie, high voltage Pin 13 (RB7) selects the delayed or 1 PlC16F88 microcontroller pro- 1 1- 0dokonot substitute) 1w 5% immed\u00ecate mode of operation, depend- grammed with fantimer.hex (lC1) 2 2.2kA 1 1ko ing on whether a \u00ccink is connected 1 470A (delayed mode) or omitted (immedi- 1 1kO5W 5% 10o ate mode). When the microcontroller is reset or first powered up, the RB7 resistor is connected across the Tiiac to that it can handle a wide range of AC input is pulled high via al internal damp any voltage spikes from the fan fan motors. pull-up resistor and it checks to see if motor that may damage the Triac, Inci- The Triac is a\u00ccso referred to as the pin is high or pulled low via the dentally, the specified BTA0B-60OTW Iink. Once it \\\"knows\\\" the answer, the Triac is listed as a \\\"snubberless\\\" type, a \\\"logic level\\\" type but this is not internal pull-up resistor is deselected because it requires a 5V logic signal and no current flows through the link which means that it supposedly does to turn on (like a logic-level Mosfet) (if present). not require an external snubber net- but because its low SmA gate current work. Howe\\\\\/er, we have included means that it can be easily turned on Pin 9 (port RB3) drives the piezo the components anyway, to be sure transducer via a 10f) limiting resistor. by logic circuitry. The transducer is driven with a square wave at around 2kJlz lo produce an ID Developed for students, & professional performance PHONE (02) 4351 0886 makes PICAXE the most easy-to-use micro ever: 8.30-4.30AEST Mon-Fri PICAXE \\\"programmerrf is two resistors and a 4.5V battery! FAx (02) 43s1 088e 24 Hou's siliconchip.com.au OcroBEn 2oo5 7S","Fig.4 (above): follow this parts layout diagram to build the PC board. Take audible beep when the timing period care with component orientation and note that the 1kQ 5W resistor should is increased, be mounted slightly proud of the board to aid cooling. Finally, there is the question of se- Below: leave jumper ]P1 out if Iecting the preset times for the fan to run. Trimpot VR1 is connected across you want the timer to operate in the 5V supply rail and its wiper can immediate mode, or install it for be set to provide between 0V and 5V extended mode operation. to pin 1S (AN1). This input monitors the voltage and an internal analog- to-digita\u00cc (-4.\/D) converter produces a digital value which determines the preset timing period. Fig.5 shows the expected delay times for different settings of VR1. Construction Before starting construction, be sure to read the warning panel at the start of ihis article. All parts of this circuit operate at 240VAC and are potentially lethal if accidentally touched while it is connected to the mains. The Fan Timer is built on a PC board coded 10110051 and measuring B9 x B1mm. Fig.4 shows the parts layout. Begin by checking the PC board against the published pattern to ensure there are no shorts between tracks or breaks in the copper, That done, install two PC stakes to accept the piezo transducer connections, then install the 2-way header for jumper p\u00ccug JPl. Followthese with the wire link and the resistors. Table 1 shows the resistor colour codes but you should also use a mu\u00cctimeter to check the va\u00ccues, as some of the colours can be difficult to decipher. Note that the 1,5Me) resistor must be a VR25 high-voltage type (do NOT substitute). ftm @ffituffi Value pF Gode IEC Code EIA Code 47OnF 0.47\u00a1t\\\"F 470n 474 100nF 0.1pF 100n 1O4 47nF .047\u00a1t\\\"F 47n 473 4.7nF .0047\u00a1;F 4n7 472 tr il0. Value 4-Band Gode (1%) 5'Band Code (1%) tr 1 1.5MO (VR25) brown green green yellow NA tr 1 10kO brown black orange brown brown black black red brown tr 2 2.2kA red red red brown red red black brown brown tr 1 1kO 5% brown black red gold NA tr 1 .4l07O0A yellow violet brown brown yellow violet black black brown tr 1 brown black black brown brown black black gold brown BO SILIC)N CHIP siliconchip.com.au","Note also that the 1kO 5W resistor The PC board is fastened to integr\u00e3l should be mounted 3-4mm proud of tapped pillars inside the case using the PC board to allow the air to circu- \u00ccate beneath it for cooling. four M3 x 1-0mm screws, Next, install a socket for IC1, mak- 20 SECONDS \u00f3 MINI'\u00ceE5 I I MINIJIES ]\u00f3 MINTJTES 22 MINL\u00cd\u00cfES ing sure the orientation is correct VRI TIME SETTINGS - the notched end goes towards the Fig.S: here's how t lay time intervals. Note 100\u00a1rF capacitor as shown on Fig.4. th\u00e3t this trimpot o attempt to adjust_it after That done, the capacitors can be in- the Fan Timei has stalled but watch the polarity of the less you use a fully' insulated tool. electrolytics. Do not substitute for this case, as Once you are sure that everything Diodes D\\\\, D2 and ZD1' can go in it's ideally suited to the job. For safety is correct, the board can be installed next, again making sure they are all reasons, it's vital that the PC board be in the box. It's simpiy secured to the fully enclosed inside the case, with no four tapped integral pillars using M3 correctly oriented. Also, be careful not protruding metal parts. Don't even think of using a metal case! x 10mm screws. to get D1 and D2 mixed up - D1 is a You now have to decide on the time The plastic case will need to be 1N4007, while D2 must be a UF4003 that you want the fan to run for and drilled so that there is access for the adjust trimpot VR1 accordingly, Fig.5 fast recovery type. shows the expected time periods for external wiring to connect to the screw several positions of VR1. Do not at- Now for the Triac. This must be tempt to adjust VR1 after the circuit installed with its metal tab facing terminals. These holes also allow the towards the terminal block, Push it as sound from the piezo transducer to has been connected to the mains, far down onto the PC board as it will comfortably go before soldering its escape from the box. unless you use a fully-insulated tool Before installing the board, go over (the trimpot operates at mains po- leads. Note: be sure to use the specified tential). your work carefully and check that all Triac - do not substitute for this part. You also have to decide on the oper- The piezo transducer can go in parts are in their correct locations and ating mode that's required. Leave JP1 next. It's secured to the PC board us- that all polarised parts are oriented out if you simply want the fan to run ing two M2 screws and six M2 nuts, correctly. Check also for any short for a set time after if has been turned with four of these nuts (two on each side) acting as spacers (ie, they go circuits due to solder bridges on the OCT)BER 2OO5 B1 between the transducer and the PC board), That done, slide some small- copper side of the PC board. diameter heatshrink tubing over the transducer's leads and solder them to the adjacent PC stakes (the polarity isn't importani). The heatshrink can then be slid down over the PC stakes and shrunk down to insulate (and strengthen) the connections, The large shrouded 4-way screw terminal strip is next on the list - just push it all the way down onto the PC board and solder it at the four central points. The two outer mounting points are not used here - ie, Ieave the mount- ing screws out. Finally, finish the PC board assem- bly by inserting the programmed PIC microcontroller (IC1l into its socket. Installing it in the case The completed PC board is housed inside a sealed IP65 ABS plastic box measuring 115 x 90 x 55mm. The specified unit (see parts list) is made of high-impact ABS material and features wall-mounting holes that are fully isolated fiom the internal compartment. It also features four integral mount- ing pillars with threaded brass inserts on the base and the lid-fixing screws also go into threaded brass inserts at the corners. siliconchip.com.au","on (this is the \\\"immediate\\\" mode). Alternative\u00ccy, install jumperJPr if the want the fan to continue running for a set time after it has been switched off (\\\"delayed\\\" mode). By the way, don't be tempted to substitute a conventional pot for trimpot VR1. That would be much too dangerous. Remember - it operates at 240VAC. Finalliz, the front panel label should be affixed to the case lid, while the two warning panels should be cut out and attached to a couple of inside walls. Fig.6: here's how the Fa\u00a1 Timer is connected to the mains and the fan. Installation o\u00bf IAII IIMER There is no safe way to test the Fan o \u00cao\u00a1\u00f8q! Timer circuit before it is instal\u00cced - see Eo IE the warning panel, It really is a mat- ter of installing it and then seeing if it \u00f8l works correctly, -r3 NEI,JTRAT Note that this unit should only be .t9!rEo ior\u00a1i WARNING: ALL PARTS INSIDE OPERATE AT 240VAC connected to the house wiring by a li- DISCONNECT FROM MAINS BEFORE SERVICING 3o\u00a1 censed electricia\u00a1r. Note that the speci- 3o fied box has mounting ho\u00cces adjacent to the four corner pillars, which means \u00e39x: \u00a1-\\\" that it can be secured to a timber beam or floor joist using wood screws. These \u00deo: mounting holes are fuliy iso\u00ccated lrom t- D\u00e2NGER: F\u00e2N TINER 10110051 the internal circuitry, so this is safe to do with the specified case. o +-lHIGH UOLT\u00e2GEI When the Fan Timer is powered up, the switch wil\u00cc initially have to be \\\"switched over\\\" a couple of times to turn the fan on. This wiII a\u00ccso have to be done if there has been a power blackout or brownout. This feature prevents the fan from starting up on its own when power is initially applied to the circuit. Once the fan has been switched on, the switch then acts as normal, according to t\u00fee timing mode set by JP1. Dealing with a thermostat fF\u00eaN Finally, note that some exhaust fans are incorporated into heater lamp as- semblies - eg, the IXLTastic range, as used in bathrooms. In these units, the fan will automatically start and run when the temperature reaches a cer- tain level within the fan enclosure. The switching is done using a thermostat and is necessaly to provide cooling inside the housing. The thermostat switch is connected between mains Active and the fan and will therefore operate in parallel with H{ the Triac of the Fan Timer. This means Fig.B: above are the full-size artworks for the front panel & the PC board. that the thermostat will override the a2 StttcoN Cutp Fan Timer when closed, with the Fan Timer then operating normally when the thermostat opens. Sc siliconchip.com.aLt","PRODVCTSHOWC\/{SE OEM Bluetooth from RF Modules Altlonics'new Melbourne RF Modules Australia has intro- module, store DMM : duced a range of miniature OEM it gives an GIUEAWAY Bluetooth modules, suited to a wide effective Altronics range data link applications, would like range ofup fr to welcome The Promi-ESD and Promi-ESD- \\\"i all Victorian 02 OEM Bluetooth modules offer to 100m. electronics en- short ald medium range, low-power, Both :: thusiasts and reliable bi-directional data link com- hobbyists to munications in a miniature footprint. modules are configured as Bluetooth their new Mel- Their UART interface makes them bourne store, Serial Port Profile (SPP) devices pro- located in Springvale and opening ideal for embedding in low power on October 3rd. viding integration into Microsoft Win- applications where connectivity to As an enticement they are of- dows XP Bluetooth support. fering you an excellent digital the new wave of Bluetooth equipped devices is required. ' They can be paired with most mod- multimeter absolutely free with ThePromi-ESD-02 Class 2 Bluetooth ern Pocket PC and Palm devices that any purchase (even a 50 cent purchase!). Simply ask for the free module, measuring L8 x 2O x 6mm, is support Bluetooth connectivity. The multimeter mentioned in SlucoN Cun magazine, October issue. equipped with an on-board chip an- modules are compliant to Bluetooth Strictly limited to one per person during October 2005. tenna giving an effective range of up specification V1.1. This fantastic little 3.5 digit to 30 meters, making it ideal for PCB The modules are supported by a multimeter features 19 ranges in- cluding an in-built tra\u00a1rsistor a\u00a1d mounting where space is a premium. separately available development and diode test function. This module offers low power opera- testing jig, the Promi-DBS, to allow the This meter provides a surprising tion and is suited to battery powered number of features and facilities user to configure and test the modules, and would be perfect for the bud- and hand held applications. ding enthusiast or a spare meter The test jig is supplied with a suitable for the toolbox or glovebox. The Promi-ESD Class 1 Bluetooth serial adapter cable, configuration 0ll[Y at Altronics (Melbourne store) module, measuring 27 x 27 x 6mm, software and manuals on CD. 891 Princes Hwy, Springvale Uic is supplied with an external antenna, Contact: RF Modules Australia cable and connector. P0 Box 1957, Launceston, Tas 7250 Being a higher power Bluetooth Tel: (03) 6331 6789 Fax: (03) 6331 1243 Websile: www.rfmodules.com.au [aycar sponsors \\\"Sunsprint\\\" solar car race series laycarElectronics was the major which combined design, electronics OUTER :l lli '''ffi]= sponsor for the recent \\\"Sunsprint\\\" and mechanical skills. INSUUTIGl solar-powered model car races, The winner of the Sydney event, OUTER next to race at the National Finals in Teams of enthusiastic construc- WIDIilG - tors from secondary schools de- Melbourne (also sponsoredbyfaycar), signed and built the \\\"cars\\\" which was St Pauls Catholic College, Greys- YJIHOIilG tanes, with their car no. 5; \\\"Nitrous\\\". INSUL\u00c4TIH were then raced against each other on a figure-B circuit including a Contact: IflNER very testing (for some !) overpass at Jaycar Electronics wtNDlilG - the University of New SouthWales, P0 Box 6424, Silverwater NSW 18'11. shown in our photo at right. Tel:1800 022888 Fax: (02) 9741 8500 Manufactured in Australia Comprehensive data available There was also a straight, short Website: www.iaycar.com.au Harbuch ElectloniGs pty u\u00bf course for a \\\"novice\\\" division. 9\/40 Leighton Pl. HORNSBY 2077 In somewhat overcast conditions Ph (02) 9476-5854 Fx(02)9476'3231 for the Sydney event (which were described by organisers as the best OCT)BER 2OO5 B3 conditions for years!J cars completed two laps of the course, if they could - although the shadow under the overpass put paid to some! Gary lohnston, Managing Director of Jaycar Electronics, said that his company was delighted to support this popular - and growing - event siliconchip.com.au","USB to USB copies without a TDK Semiconductor With so many USB devices around destination flrst to avoid overwriting no more! these days, there are many times you or duplication. It makes a perfect TDK Semiconductor Corporation., a need to copy data from one to another. leader in mixed-signal integrated cir- backup system, supporting USB mass cuits, has changed it name to Teridian It's not hard to do - just plug both de- storage devices using FATL2\/16132 Semiconductor Corporation, effective immediately, vices into computer USB ports, wait file systems. until they're recognised, and copy. The company's newname comes as It sells for $79.00 from Microgram they launch a number of new products But what if you don't have a compu- in the residential and industrial meter, ter handy? This nifty little device from Computers (Cat 357a-13). smart card reader, Ethernet, and WAN Microgram Computers lets you copy data f\u00a1om USB device to USB device markets. without a PC. You simply choose the The company is working with its source and destination - and start customers to facilitate a smooth name copying! change transition. It's ideal for copying MP3s, software, pictures and general data files from Contact: Contact: one to another and even checks your Microgram Gomputes Teridian $emiconductor t brackets 1\/14 Bon Mace Cl, Berkeley Vale 2261 6440 Oak Canyon, lrvine Ca 92618-5201 Tel:0011 1 714 508 8800 Tel: (02) 43Bg 8444 Fax: (02) 4389 8388 Website: www.teridian.com Website: www.microgram.com.au Altronics have released two new DSE's USB-c\u00f3ntrolled Electrocardiograph kit LCD mounting brackets for moni- Dick Smith Electronics have re- dered from t\u00ec.eir nearest DSE outlet leased their long-awaited kit for the tors and televi- or from our Direct-Link Mail order sions. Top is the Electrocardiograph, as featured in the HB1B0, which al- centre (TolI Free - Australia OnIy lows both hori- February 2005 SIICoN CrilP. - Phone L300 366 644). case has zontal and vertical TheDSE kit has all specified com- A specially designed ponents and hardware includingthe adjustment for use been manufactured for the project. USB interface module from Elexol in a wide variety It is fully punched, powder-coated of installations. and a pair of ECG pads will also be supplied in the kit to get construc- (matte black) and screen printed to Mountingholes are tors started. Additional pads (Cat give the final projectthat professiona-I provided for stand- ZA-5743) are available foom the kit department and in turn can be or- \\\"your friends won't believe you built ard VESA sizes, making tlem with most LCDs. it\\\" look. Botom is the HB1B1, similar to the Priced at $139.00, kits will be above unity but is more stylish and available from all DSE retail stores has an extendable arm. (excluding PowerHouses), mail-order , and internet sales. (Cat K-370aJ Contact: Contact: Altronics Distributors llick Smith Electronics (all stores) Box 8350, Perth Business Centre 6849 I P0 Box 500, Regents Park DC NSW 2143. Tel: 1300 797 007 Far: (08) 94282187 Tel:1300 366 644 Fax: (02) 9642 9155 Website: www.altronics.com.au Website: www.dse.com.au WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WE -. !VEBLINK ] WEBLINK WEBLINK SC : WEBLINK WEBLINK SC ] WEBLINK WEBLINK SC WEALINK SC IVEBL -. WEBLINK product or serv\u00a1ce featured both uE -. WEBLI\u00a1]K the SILICON CHIP webs\u00a1te for the ffi ] WEBLINK one low pr\u00a1ce? Benedictus or Lawrence Sm\u00a1th 9211 9792 for allthe details! WEBLINK SC WEBLINK SC \\\\{EBLINK SC WEBLINK SC \\\\{EBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEBLINK SC WEb:","qnil Jvnoc _ and are factory assembled for long life operalion. *':i:f,:[f:2 .iq'i\\\",i,i'\\\"Sg\u00eea_\\\"qu,,uia\u00edaitiar\\\"e lishtinsD\u00a1recl connection to 12v (AC or DC) makes these \\\"'\\\"':\\\"\u00e4;;u - lCguhnrdoinn eGoll a,n'idlAiisxflholtrtsiisuihlisdrielef,iiannll1ifnloog\u00e5wrs-blpaa,orclewk\u00ed-esiuiiup,p(leoptnrttieeeldr\\\"mgfyieufrsis:l\u00ecyexvn\u00a1naic-iyqls)i:ssiiey;;msi,tbetmed - _ Bronze and filted with 3Watt High-Power LEDS, - Satin Chrome withlow power consumption, typically - 300m4 @12V ldeal for Caravans, Motorhomes, Boating and Camping applications. (scteal\u00a1llllnlegss ostuerertl) We also stock a full range of other Ceiling, Wall mount and 0utdoor type light fittings. Please visit our web site to view a full and detailed colour brochure of all\u00cdittings available and request fu\u00a1lher information. o Uses 3 Wall Hi-0ulput LED with Expecled Life 50,000 hours plus GOTflUBS: . lnput 12-24VDG or 12-18VAC (low power consumption, 300m4 @12V) 3 Shades of white & 10 colours available: . Up to 60 Lumens light output Sun White, Cool White, Warm White, o Wide beam angle 110\\\" (Nanow beam angle available soon) Red, Amber, Orange, Purple, Magenta, Green, o Total height 39mm (+ Pins) (colour changing longer) Grass Green, Blue, Light Blue, Cyan \u00a1 Standard 50mm diameter. Drop-in for MR16 lamp housing PIUS: Multicolour changing lamp with RGB LED . No UV 'or Heat radiation (Run much cooler lhan standatd halogens) (cycles through various Red, Green, Blue .o Gonforms lo lEC, CE & EN slandards colour changing routines) Colour control option via lR Bemote or RS4B5. For use with \\\"iron core\\\" lransformers (eleclronic type not Fully Dimmable Email us: BRISBANE SOUTHPORT SYDNEY 22 Campbell Street 1 1 Brickworks Cntr, Bowen Hills QLD 4006 Warehouse Rd 185 Parramatta Road I Telephone: (07) 32523762 Southport QLD 4215 Homebush NSW 2140 ELECTRONICS Telephone: (02) 9704 9000 Facsimile: (07) 3252 5778 Telephone: (07) 5531 2599 Facsimile: (02) 9746 1197 Facsimile: (07) 5571 0543 L NK - .tN ]N L NK L NK L NK .LINK SC IVE L NK LINK SC IVE ,LINK SC !^r'E L NK ,LINK SC WE LINK SC WE WEBL NK N WEBL NX LINK SC WE IVEBL NK N LINK SC WE WEBL NK LINK SC WEBL WEBL NX N LINK SC IVEBL \\\\{EBL NI( LINK SC IVEAL WEBL NK N lnternational satellite TV reception in your WEBL NI( LINK SC V\/EBL WEBL NK N home \u00a1s now affordable. Send for your free LINK SC IVEBL WEBL NK N \\\\!EBL NK LINK SC WEBL WEBL NX N info pack containing equipment c\u00e5talog, LINK SC WEBL IVEAL NK LINK SC WEBL WEAL NK N satellite lists, etc or call for appointment LINK SC WEBL WEBL NK LINK SC \\\\^JEBL WEBL NX N WEEL NK N to view. We c\u00e5n display all satellites from N 76.5\\\"10 180'. N N Av-C0MM Pty Ltd N N Tel:(02) 9939 4377 Far (02) 9939 4376 N WebLlNK: avcomm.com.au N","fftc t#i\u00e6\u00bfrcG\u00c6'ftufFfjG The iButton family of devices feature silicon its 64-bit serial number is guaranteed chips armoured within L6mm stainless steel to be unique and therefore traceable. iButton serial numbers are also laser cans. Here we describe the basics of these engraved on the outsides ofthe cans so unique devices and then show you how to that human eyes can read them! build a simple PICAXE-based project to read Owing to the small size and robust their serial numbers! nature of the iButton package, it can By Gllue Seager* travel with a person or object to pro- tTrHE iBUTTON F,\\\\MILY consists This feature rirakes the iButton ideal vide many useful functions, including access control, environmental moni- I oI ou\\\", 20 different products, in- for use in automatic identification toring and data storage. cluding devices that contain memory, systems. The stainless steel button is durable temperature sensors, data loggers and In fact, the simplest member of the enough to be worn everyday on an family, the DS1990\u00c2 Serial Number accessory like a ring, key fob, wallet, even Java computers. Every iButton watch, metal card or badge. It is also produced (to date over 100 million) iButton, is designed specifically for water resistant and so can be worn has a unique silicon serial number. identification tasks. Like a\u00ccl devices, while washing or swimming. An assembled PICAXE The information in an iButton calbe accessed by tapping it against a simple iButton reader board, dual-contact metal probe connected to complete with iButton an e\u00ccectronic reader circuit. This type of metal probe is much cheaper and probe & piezo sounder. more durable than a magnetic swipe or \\\"smart-card\\\" reader and the iButton Although not v\u00edsible itself can have a much larger memory capacity. iButton technology is also here, the probe has an cheaper than radio frequency style ID LED in its centre for cards (RFID), visibility at night. Inside an iButton f The electronics inside an iButton connects to the outside world via the B6 StttcoN Cntp base and lid of the metal can, which are electrically isolated from one another by a polypropylene grommet. When an iButton is momentarily touched against a probe, the side makes a ground connection and the lid (face) makes a power\/data connection. In a fraction of a second, the iButton accumulates sufficient energy from the reader to power its circuits. It then communicates with the reader over the * About lhe aulhor: Glive Seager is lhe Technical Director of Bevolution Education Ltd, the developers of the PIGAXE system. siliconchip.com.au","PICAXE.OSM PIC\u00c0XE-O8M +V OV ,I-N-\u00bfE00f1t- SERIAI. IN AK \/ \/OUT O SERIAI-OI,.IT INFRAOUT tN4\/OtrT4\/ \u00fe\u00d0C4 tNr\/orJTr\/ADcl \/IN 3 INFRAIN rN 2 \/ OUT 2 \/ ADC 2 \/ PWM2 \/ TUNE - -qg PIGAXE.\u00cd|SM \u00a1BUTTllII REAIIER Fig.1r here's the circuit diagram for the reader. The data line from the iButton Here's n'hat's probe is connected to input 4 of the PICAXE microcontroller (ICL), with power to the probe provided by a 4.7kQ pull-up resistor. The transistor (TR1) can be inside an i used to drive an external relay when a valid iButton serial number is detected. same connection, providing its serial do not require an internal battery. To- gether with their robust stee\u00cc casing, number and more, depending on the this makes for a product with a very long life span. type of device. PICAXE iButton reader For obvious reasons, Dallas refers to this ultra-simple power and data Due to the complexity of ihe 1-Wire protocol, iButton readers are typi- connection method as a \\\"l-Wire\\\" cally microcontroller based and this interface. The relatively complex is w\\\\ere our PICAXE project for this communications protocol used over month comes in. Using the PICAXE the interface is known as the l-Wire protocol. Communications speed BASIC command readowsn (for read is 16kbps in \\\"standard\\\" mode and The kit includes 142kbps in \\\"overdrive mode\\\". one DS1990A iButton and The iButton can transmit a surpris- a plastic fob which are ing\u00ccy amount of informationln a rela- easily snapped tively short time. In fact, it is almost together. impossible to tap an iButton against a OCT)BER 2OO5 A7 probe quicker than the time required by the iButton to transmit its serial number, This makes the iButton an ideal device for applications such as locks where operation must appear to be virtually instantaneous. As the l-Wire interface provides power to the iButton, most devices siliconchip.com.au","Fig.2: use this diagran I connects to input 4,with power to the as a guide when bus provided by the 4,7kA resistor to 4.5V. An optional external push-but- assembling the reader, ton switch can be connected lo input Don't forget to install 3 to allow for manual activation in a door lock application. a wire li\u00a1k between A transistor (TR1J driven from the two \\\"+\\\" holes at |1 output I provides an open-collector and double-check the orientation ofIC1, D1, output that can be used to drive an TR1 and t\u00ece battery external relay. Diode D1 across the output terminals limits the back-EMF leads. spike generated during relay switch- 1 AXE109 PC board Here's what the assembled PC ing. As mentioned, the relay could be 1 3.5mm stereo socket (CT1) board look like. As shown, the C2 3 2-way terminal blocks (CT2- component position on the board used to power a solenoid type door is left vacant. lock. Alternatively, the transistor out- cT4) put could be used to trigger a circuit 1 4-pin 2.54mm-pitch SIL header one-wire serial number), users can of your own creation. 1 8-pin lC socket read the unique serial number fiom an 1 100nF polyester capacitor iButton with the aid of a very simple AII thatremains to be mentioned are 1 piezo sounder circuit and without detailed technical the piezo sounder and LED outputs, 1 battery clip knowledge of the protocol. which are connectedlo output 2 and 1 3 x AA battery holder output 0, respectively. Note that the 1 plastic iButton holder The circuit for t}re PICAXE-0BM 1 DS9092L iButton probe w\u00a1th iButton reader appears in Fig.l. As LED is incorporated in the centre of shown, the circuit could be used to the iButton probe housing (supplied LED in the kit) to provide an aiming point drive a solenoid type lock (via a relay) PToAXE-O8M (rC1) but is probably more suitable for use as during night-time use. 1N4001 diode (D1) a building block within more complex 8C548 transistor (Q1) circuits. As with most PICAXE projects, 1 DS1990A Serial Number iButton PICAXE enthusiasts will find the the circuit must be powered from a circuit quite straightforward. The Resistors (0.25W 5%) 4.5V battery pack or regulated 5V DC 1-Wire bus from the iButton probe 210ko 1 4.7kO supply. 1 330c\u00bf 1 1kO Assembling the reader 1 22kA The simplicity of this design makes Also required (not in kit) for a very simple PC board layout with PICAXE Programming Editor few parts, so assembly is very straight- software (v4.1.0 or later) PICAXE download cable (part forward. Using the overlay diagram in no. AXE026) Fig.2 as a guide, beginby installing the 3 x AA alkaline cells resistors, diode (Dl,) and IC socket for Obtaining Kits & Software the PICAXE-OBM (IC1). The design copyright for this project is owned by Revolution Take particular care that the notch Education Ltd. Complete kits (part no. AXE109) for this project are in the IC socket matches that shown on the diagram, This will be used as available from authorised PICAXE a guide when plugging in the PICAXE distributors - see www.picaxe. chip, which also has a notch on com.au or phone Microzed on one end. Also note that the cathode (02) 43510886.The PICAXE Pro- (banded) end of the diode (D1) must gramming Editor software can be downloaded free of charge from iBtrfloN www.picaxe.co.uk or ordered on CD (part no. BAS805). @nhEcnNG WRH'rcREADR, BB SIUCON CHIP u\/rcoD\u00c9.toRl{o[nD\u00de PI.ASTIC BASE ffiffi*ft\\\" rHEG.{\u00cdACTS Fig.3: it's easy to make your own probe for experimental purposes ssing a pair ofpaper clip \\\"contacts\\\" anchored to a wooden or epoxy resin base, siliconchip.com.au","nffim AtffiBU\u00feEf,hflbfltflom An iButton can be attached to a plastic card and used for access control instead of magnetic stripe technology. There's no traditional key slot in this Mechanisms exhibit atThe Big ldea exhibition (photograph @ Revolution door handle - just a probe to accept Education Ltd 2oo0). an iButton for user identification! lhe Big ldea is a permanent 113 be oriented as shown. f million ($431 million) technology Use one of the resistor lead off-cuts millennium exhibition, located on the to make a link (f1) between the two site of Alfred Nobel's dynamite factory in Ardeer, Scotland. lt is essentially a pads marked \\\"+\\\". Following that, in- stall the 10OnF capacitor and transistor giant inventors'workshop, with a large TR1, noting that the flat side of the transistor must face the capacitor. number of hands-on exhibits explaining the principle themes of technology and A\u00ccl of the connectors (CT1-CT4) can go in next. You may find that the kit invention to children. includes one 2-way and one 4-way screw-terminal block. The 4-way ter- The Big \/dea uses a custom iBut- minal block is easi\u00ecy converted into two 2-way blocks simply by snapping ton tracking system developed by The visitor's iButton tag activates (or sliding) it apart! Push the stereo *l l;t\u00f3Revolution Education Ltd. On entry \u00e4ftffi',m#fllj\u00e5i,tll\u00eelif, ,iti, socket (CTr) down firmly so that it rhe exhibirion, eacr' u\u00a1\\\"\u00a1toi is snaps into place before soldering. The final step is to install a 4-way iButton tag housed in a plastic key fob. single-in-\u00ccine (SIL) header strip for At the same time, the visitor's name connection to the iButton probe. This and postcode is entered into the computer system, along with their unique iBut- is probably supplied in a 1O-way strip in the kit but is easily cut down to the ton serial number. correct length with a sharp knife or As the visitor moves around the exhibition, the iButton tag is used to activate the various exhibits. At the interactive computer screens, the visitor is welcomed side cutters. by name when the iButton is touched, whereas at the physical exhibits, the iBut- The battery clip and piezo sounder ton activates the exhibit and sets a timeout period. can now be connected to the board. One of the many unique features o\u00cd The Big \/dea is that each visitor is given an inventor's pack to build and take away. These packs are dispensed by a vending It is crucial that the battery leads machine, once again triggered with the touch of an iButton. are connected around the right way; Each time a visitor's iButton is used, the time and location are logged by a computer system. This is used to create a personal \\\"certif icate of achievements\\\", otherwise, the PICAXE chip will be which is available for collection at the end of the day. destroyed at power up! To reiterate, OCT)BER 2OO5 BS siliconchip.com.au","'reset family code to 0 'LED off 'output off . 'LED on or off 'switch pushed? 'wait 'read serial number on input4 'ibutton detected sound 2;(50,50) 'beep high 0 'probe LED on 'modifu all of these if b13 <> $FA then main : 'to match your unique it b12 <> $00 then main 'iButton serial number! \u00f6\u00a1f b11 $00 then main \u00a1f b10 <> $08 then main if bg <> $23 then main if b8 <> $A1 then main if b7 <> $00 then main if b6 <> $01 then main ' Everything is 0K so switch output on for 5 secs 0pen: the red wire ftom the clip goes to 'V+\\\" Finally, the toggle command is used with a purpose-built probe, Although and the black wire to \\\"0V\\\". As you can see lrom the diagram and photos, the to flash the LED in the centre of the off-the-shelf probes are readily avail- piezo leads can be threaded through iButton probe, allowing you to find it in the dark of night! able, it's a relatively simple matter the adjacent corner hole before solder- to make your own for experimental ing to provide strain relief, Note that you must alter the serial purposes. As shown in Fig.3, a pair number values where indicated to of paper clip \\\"contacts\\\" could be PICAXE program match the unique code that is laser anchored to a base such as wood or The BASIC program in Listing 1 engraved in \\\" 2-L2-2\\\" format on the face of your iButton. For example, the iBut- epoxy, for example, shows how easy it is to read an iBut- ton used with the program in Listing ton serial number using the PICAXE- 1 would be engraved like this: However, if you have a serious 0BM. When a valid serial number is returned by the readowsn command, FA 01. application in mind, you wiII prob- it is compared with a predefined 16- ably want to purchase the kit for this digit [B-byte) number. 00000823,q'100 project as it includes a professional Eachunique code uses the hexadeci- If the numbers match, the transis- quality probe with an embedded LED tor is switched on for flve seconds mal digits 0-9 and A-F. Do not confuse ald the piezo generates a two-tone D with 0 or B with B! [see photo), sound. If not, a single tone is gener- ated instead and the program loops Making your own probe Want more information? back to the start, As described earlier, the two con- The iButton is an interesting low- nections necessary for iButton opera- cost technology that can be incor- 90 Stuco\u00a1,t Cmp tion [power\/data and groundJ are made porated into numerous projects. By modifying tlre circuit provided, the iButton canbecome the \\\"key\\\" to many exciting projects! Detailed information about the iButton ralge is available from the DaIIas Semiconductor\/Maxim website at www,iButton.com sc siliconchip.com.au",". . . a tern[c]atute \u00faatal\u00fbgget in a l0mm sta\u00a1nless stGel can! One of a range of datalogging iButtons, the student's name, for example. DSL92L houses a battery and an embedded computer chip that integrates a temperature All iButtons include a unique 16- sensor, a clock\/calendar and memory. digit silicon serial number for identi- tTtHE MEASUREMENT RANGE for more than 10 years, or up to 1 million fication. As described in our previous iButton article, this serial number can I the DS1921 iButton's lempera- temperature measurements, be read out using a simple PICAXE- \u00c4s well as the datalogging memory, ture sensor is -30'C to +85\\\"C in 0.5o OBM circuit and BASIC program. increments, while the clock measures these devices also incorporate a further seconds to years accurately to +1 512 bytes of user memory. This space Unfortunately, PICAXE BASIC does minute per month from 0\\\"C to 45'C. could be used to store a product de- not include any commands that enable scription, shipping manifest or even a us to easily access the DS1921's other Incredibly, the iButton can log data for resources over tle 1-Wire bus. siliconchip.com.au However, iButton manufactuter Dallas Semiconductor a\u00a1rd Revolution Education have produced a general- purpose Windows-based application OCTOBER 2OO5","The DS1921 iButton belongs to datalogger is ideal for this purpose. the finest quality fish are sold on to the Thermochron family of datalog- This small, low-cost iButton is easily gers, which include devices with clipped onto a piece of plastic and the restaurants. placed beside the fish in each crate. high accuracy measurements, larger The iButton is programmed to take The iButtons are collected and readings every 30 minutes and its then mailed back to the salmon memories and even humidity meas- farms so that they can be reused. urement capabilities. These devices memory is programmed with the As the iButton has a life span of up to 10 years, it can be reused many continue to be applied in a wide range shipping details, such as lot number and batch quantity. times, making it a very cost-effective of commercial applications, including As the iButton contains an Inter- datalogging device. food quality control, as highlighted in nal battery, it operates completely the following example. autonomously, requiring no external Around the coast of Scotland connection to pedorm its pre-pro- and Canada, aqua-culture farms rear salmon for sale to restaurants grammed datalogging tasks. When the crate arrives at its des- around the world. Many salmon are tination in Japan, the merchant can destined for Japan and therefore retrieve the iButton, connect it to a must be transported by air, packed laptop or Palm computer and upload the data. The temperature readings in crates of ice. can be displayed as a graph and the It is naturally very important that merchant can check that the salmon the fish are maintained at the correct temperature during the journey, par- have been stored between the correct ticularly if they are subjected to de- lays at the airport terminals. For this te m pe ratu re th res holds fo r th e e ntire journey. lf the temperature limits have reason, it is desirable to constantly monitor the temperature of the fish been exceeded the fish are rejected over the duration of the journey. and destroyed.This ensures that only The DS1921 iButton temperature that provides full access to the iBut- and time information, the user must To perform the configuration, the first set a number of key parameters. iButton is clipped into a \\\"BIue Dot\\\" ton's resources. The software is utell adapter, which is in turn connected to suited for use in a classroom or labora- These are as follorn's: tory situation, as it provides all that's a computer via its serial or USB port. necessary to initiate datalogging and o Set the internal clock to the current The Windows software can then be retrieve mission results. used to set all of the parameters and date and time. To use the software, the iButton's initiate the mission. 1-Wire bus must be hooked up to the o Enter mission details (eg, student PC's seria\u00cc or USB ports. Let's see how Once configuration is comp\u00ccete, it all works. name and purpose of experiment). the iButton is removed from the Blue Configuring the iButton o Set the sample rate (1 minute to Dot adapter and placed in the logging Before the computer chip in an iB- 255 minutes). position, The iButton's stainless steel utton will begin logging temperature o Set the upper and Lower tempera- case withstands dirt, moisture and ture alarm threshold values. rough treatment and its sma\u00ccl size means that it can be attached unob- o Set the mission start delay (time before the mission starts - up to 45 daysJ. ,'\u00ecnsrclt nurron [9oooo0ol486tt21 \u00ec\u00cbDst92t iBuilon - 890000001486tt21 :E DSI 921 \u00a1Bu(on, S9O0OOOO1486tt2l ,\/cdd I H \u00a1a B:1nJ \u00cc sr$\u00a1 i r.\u00a1r\u00c9 '\u00a1 x{\u00f1 F\u00e8:d\u00a1 i !,:\u00f9j j V\u00a1\u00e9w Opl\u00econ\u00a1 lenperJure Loq ,.Fr.gr*: t\u00a1,::+r:.\u00bf1 2t\/\u00f9\u00ca\/2005 ri 20 dtr\u00a1r\u00a1Le \u00ca'rF d, oe: rry, ro\u00e6*e rij\u00f5\u00cc---!I!-: I '. i,di i r\u00c8 ! Br f, \u00f1\u00fa lrjlOe\u00der !\u00ee\u00a1f,:;j 0 '- r\u00a1-,-\u00bf:Ci:e .--s:rt.r!0r4a 5l0C ^ r{:!! 5\u00e8T}: I @58 r0\u00fa58 :i]3:: i 28\u00c6612005 r4 2{ 2o loo D l,.r'\u00a1Le:.: Fe)tDr1 I 2El\u00a1\u00ca.'20t5,r4 25.20 0!0 D i\u00bfA,O\u00a1,O\u00a1,tq:e\u00e6OOO- lemp\u00bf.\u00bflure ne\u00e8lTime Clo\u00e8t lenperdue Al\u00f4r\u00f1. Hr\u00a1l@\u00a1\u00bf6 D\u00e3l\u00f0 I i\u00bf*#\u00a1r\u00a1:ed:c.q4\u00a1 I i'.\u00a1 lL\u00bfs\u00a1\u00e3Y !5\/U\/\u00e6!5 13573r Ter*\u00ca*a: td N\u00e1ii;--!\u00e81 5!!00c {mp(+ aE:m(.El} 3S50!-C_! t\u00fa,\\\\itu.:th 2Nm'C #n f ,:\u00c9 5u1d:\/!0 !0 00 s50! c.0 : Y - , \u00bf*r i,-rt\u00a1:!!l a.\u00e9ra\\\\\u00fa.)at\u00e3de+-l t4tr.4\u20acra3ri!.1 !.!:\u00bf500'c_0 -r}n ??!q! wwva-\u20ac@.\u00fa mrd-\u00ea\u00faco,\u00fc Dev.ePr\u00bf::i ffird.4co\u00fck Dev,c\u20ac FG:rn Fig.1: software supplied with the Fig.2: once a mission has been Fig,3: current mission data is auto- starter pack makes it very easy to launched, its status can be viewed al matically downloaded fiom the configure the iButton for a mission. any time, iButton when the software is launched, 92 SntcoN Cntp siliconchip.com.au","trusively to most container surfaces The \\\"Blue Dot\\\" adapter provides a connection point for one or tw-o iButtons during configuration and data retrieval. Hook-up to the PC is made via an or wa1ls. RS232 serial or USB adapter, This could include bottles, boxes, ' 2A|0612O05 14:20 to 05r0rr2005 1l:57 \\\" 00:282BnU2oO5 14:20 lo 30m\u00f3r2005 l-A]El crates, pallets, air cargo containers, Fig.4: graphs and charts ofthe results can be instantly displayed and printed. refoigerators, semi-trailers, etc. th\u00ecy can\u00e3lso be exported in CSV format from the main toolbar. Retrieving mission data When the mission is complete, can be set. If the iButton temperature able from www.microzed.com.au or exceeds these thresholds at any point the iButton is retrieved and clipped phone MicroZed on (02) 4351 0886, into the Blue Dot adapter again. The an alarm time\/date stamp will be software is then used to extract mis- Tndividual iButtons are also available sion data. Reports and graphs can be recorded. This reveals exactly when, generated from the data and it can be and for how \u00ccong, an alarm threshold from MicroZed. SC exported in CSV format for use in other applications (eg, Excel). was exceeded. * About the author: Clive Seager is the Data storage in detail Summary Technical Director of Revolution Education The iButton stores data in three Lld, the developers of the PICAXE system. Dallas Semiconductors: iButtons different ways that serve different ap- open up a completely ne\\\\,v world of Select your m\u00a1crocontroller plication needs, as follows: datalogging possibilities. Check out kit and get started... (1). TEMPER\u00c4TURE LOGGING: the their website at wwwiButton.com for iButton can take 2048 time and date all the details. -FfOm tax a topy of stamped temperature readings at equal 5295- this ad and intervals, spaced between 1 and 255 As weLl as their many commercial re.eive \u00e5 minutes. At a 1-minute interua\u00ec, this applications (see panel), Revolution 5olo discount equates to about 1.4 days, whereas at Education believe that the low-cost on your order! a 255-minute interval, this equates to DS1921 temperature dataloggers will --\\\"= Dffi\u00e0mic c' a\u00ecmost a year of continuous opera- find use in the lab and classroom. To Feature r\u00ecrh, (ompiler, tion. The battery lasts for 10 years, so this end, they are making a complete editor & d\u20acbugger w\u00a1th almost a million readings are possible \\\"starter pack\\\" available. roy\u00bflty free TCP\/lP sta(k in this time. Prke5 rdude ItTand dellverydilq6 The iButton datalogger starter pack To fully utilise the recording mis- (Part No. LOG001) contains a DS1921 Tel: + 61 2 9906 6988 Fax: + 61 2 9906 7145 sion, the user chooses the time to begin iButton, Blue Dot adapter, USB adapter temperature taking, sets a sampling and PC software on CD and is avail- www.dom\u00a1nion.net.au rate, sets high and low alarm thresh- OCT)BER 2OO5 93 olds, and determines whether to \\\"roll- over\\\" when 2048 time ald temperature readings are completed (or to simply stop logging at that point). (2). HISTOGRAM BINS: the iBut- ton a\u00ccso simultaneously stores each temperature sample in a histogram. The histogram memory consists of 56 bins in 2' increments; each bin can hold up to 65,500 temperature readings. The histogram method of data storage serves applications that require long-term monitoring or the ability to instantly assess whether a minimum or maximum threshold has been compromised. For example, when storing blood or other biomedical products, it is critical to know ifcertain user-defined temperature thresholds have been exceeded. The histogram instantly reveals this information, together with the length of time the thresholds have been exceeded, The histogram keeps recording after the standard log is tull. (3). THRESHOLD ALARMST both upper and lower threshold alarms siliconchip.com.au","E Want to make a vibration sensor for just a tion, the greater the amount of vertical few dollars? All you need is an old cassette vibration that has occurred, deck and a couple of loudspeakers! Building it lTlHlS 2-CHANNEL vibration sensor moving in a magnetic field. \u00c4nd since At its simplest, the vibration detec- loudspeakers have very strong mag- I costs almostnothing to make bul is nets, coils with lots of windings and tor will take only a few minutes to very small internal clearances, they sensitive enough to detect a cat walk- make ideal sensors for our vibration make. First, make sure that the power ing past on a wooden floor! cord is disconnected from the mains detector. supply and then take the cover off To make it, you'll need a discarded the cassette deck. Now trace the leads (but still working) cassette deck that If the speaker basket for frame) is (they'll be shielded) that connect the has VU meters (these can be either firmly attached to the ground and a PC board to the heads. There will be six analog or digital) plus a couple of conductors in all - a common, play and loudspeakers, which can be easily vibration occurs, the basket and the record signal feed for each head. salvaged fiom an old stereo TV, Ifyou can't score that lot for under $5,00, cone will tend to move at different Cut these wires and feed them out you're not really trying. ofthe case. That done, replace the lid, rates, For example, if there is a sudden power-up the deck, press the \\\"Play\\\" High-gain preamplifi ers movement upwards, the inertia of the button and then connect a speaker The unit takes advantage ofthe fact cone means that it gets left behind for that a cassette deckuses two high-gain across the wires for one channel, try- preamplifier stages that work with very a moment, small signals. Normally, these signals ing various combinations until you are read off the tape by the heads but As a result, the magnet will move in relation to the coil (which is attached find a pair which causes a VU meter what we do here is feed in new signals to the cone) and a small voltage will to strongly react to any speaker move- which are derived from coi\u00ccs of wire be generated. ment. This voltage is amplified and dis- Now do the same for the other chan- played on the cassette deck's VU nel, You may need to extend these meters, The greater the needle deflec- leads a\u00a1rd in our case, we used the RCA It looks like a $1000 instrument but costs less than $5 to make. This 2-channel cab\u00cces that came with the deck. vibration detector is actually based on a slightly modified cassette deck and uses conventional loudspeakers as vibration sensors. [t's sensitive enough to While we were at it, we also stripped detect a cat walking past on a wooden floor. the cassette deck ofthe surplus parts. For example, the complete tape mech- 94 stuco\u00a1\u00a1t crutp anism was removed. Why? Well, the DC motor, drive belts and springs can fincl a use in another project, as can the tape counter. There's no need to leave them inside the \\\"unit\\\". Of course, ifyou take this approach, you'll qeed to activate the same switches that pressing the \\\"PIay\\\" but- ton normally does. For example, if a single switch is closed when \\\"Play\\\" is pressed, the wires leading to that switch will need to be connected together. On the other hand, you may find that when the cassette mechanism is removed, the unit is effectively al- ways in \\\"Play\\\" mode. Note too that different speakers will give different sensitivities, We tried a siliconchip.com.au","\\\"- Rat ll Befote We chose to remove the internal bits and pieces that were no longer needed Chuck lt! door and so on, This - the cassette mechanism, tape transport buttons, access a much lighter unit' Whenever you throw awaY an old allows these parts to be used in other projects and gives TV (or VCR or washing machine or dishwasher or printer) do you always think that surely there must be some good salvageable components inside? Well, this column is for youl (And it's also for people without a lot of dough.) Each month we'll use bils and pieces sourced from discards, sometimes in mini-projecls and other times as an ideas smorgasbord. And you can contribule as well. lf you have a use for specific parts which can easily be salvaged from goods com- monly being thrown awaY, we'd love to hear from you. Perhaps you use the pressure switch from a washing ma- chine to control a pump. Or maybe you salvage the high-quality bearings from VCR heads. Or perhaPs You've found how the guts of a cassette player can be easily turned into a metal detector. (Well, we made the last one uP but You get the idea . . .) lf you have some Practical ideas, write in and tell us! here, we elected to keep the original scales. Changing the sensitivity If the sensitivity of the unit is too great, simply reduce the size of the speaker. Adding weights to the cone The loudspeakers detect vibration and generate a sm4ll vo_ltage as the magnet also alters the response. moves paJt the voice-coil in each unit. The larger the speakers, the more sen- sitive the instrument. When exploring the use of different speakers, be aware that a typical house variety and found that the larger the cassette deck and more like a vibra- is fulI of background vibrations. The speaker, the more sensitive the unit tion detector, you can make a new compressor in the fridge can cause faceplate. If the original faceplate is sufficient vibration to swamp other became. removable (most are), take it off and The speakers shown here (100mm signals, while aPC cooling fan can also scan it into your PC. You can then units salvaged from a stereo TV) were cause clear\u00ccy visible room vibration. use image manipulation software to used in the author's unit and give a construct the new visuals, putting on So to be able to watch earth vibrations noticeable reading when alyone walks whatever labels you want. caused by (say) visitors walking up anywhere in the house (a two-storeys- That done, print it out at fuil-size on on-stilts Queenslander). And that even to your front door, You'll need to re- includes wa\u00ccking on the concrete pad heavy stock, gloss paper and affix it to motely mount the speaker sensor away under the house! the original faceplate. The labeL can from this house-borne noise r-ebduutc.neodteif As I type this, the unit is on my desk; then be profected using clear contact that with each normaL force keystroke, the adhesive film or a couple of strips of the sensitivity will be display meters are reading just under full-scale! broad adhesive tape. the cable is too long, New faceplate Another option is to replace the Logging the output To make the unit look less like a Finally, if you want to feed the scale behind the VU meters. You can output signal into a logging system or make the scale read anything You drive an external display, Iine-level Iike but in the case of the unit shown output voltages will be available on the normal RCA outputs of the deck' sc siliconchip.com.au OCTOBER 2OO5 95","10Over r 900\/o* 0F Listed below are a number of discontinued (but still good) items that we can no longer afford to hold in stock. We need more space in ourwarehouse! You can get most of the items belowfrom your local store orfrom our Techstore - via mail and lnternet ordering; but we cannot guarantee this. Please ring your local store to check stock. At these prices we won't be able to ship from store to store. ITEMS WILL SELL FAST AND STOCK IS LIMITED - ACT NOW TO AVOID DISAPPOINTMENT. SORRY NO RAINCHECKS iloGat l\u00a1escr\u00a1pt\u00a1on 0riginal low *Sate or lloGat llescription 0riginal l{ow *SaYe on RRP RRP 0ris RRP 0ris RBP SB-1 7] B BATTERY NI-N4H 4\/54 1 2V lSOOIMAH TAG 9s 74$B $1 $7 21 sB-1 732 BATTERY NI.f\\\\\u00a1H AA 1 2V l2OOMAH TAG 25 35$3 $1 $1 90 KEYPADALAB\u00cdM PNL AEI 6ZONE $499 00 $250 00 sB-1 702 BATTERY NI-IMH AA 1 2V 165OMAH TAG 75 95$4 $1 $2 B0 $265.00 $159 95 $1 05 05 sB 1712 BATTERY NI-MH AA 1 2V 18OOIV]AH NIPPLE PK4 95 95$r5 $6 $9 00 ALARM BELAY BOARD SUIIS [\/ELCO[A LA-5425\/6 $4S 50 sB-1 726 BANERY NI-f\\\\4H AA 1 2V 23OO[\/AH TAG I!,IAXBRACKET CEILING I\\\\4TL R\/A SLV 3OKG $29 95 $19 s5 sB-2446 BATTEBY NI MH AAA 1 2V 65OMAH TAG 25 95$6 $2 $3 30 0c-3338 CRN\/BRACKEI WALL ALU CCTV 275I\\\\4f\\\\4 $49 95 $1S 95 $30 00 sB-1 720 BATTERY NI-MH AAA 1 2V BOOMAH NIPPLE 25 45$3 $1 $1 80 0c-3801 $1\/ 00 sB-1722 BATTEBY NI MH AAA 1 2V SOON1AH TAG QC-3443 W\/lRCAMEBA CCD B&W DOIVE 1i3IN SAMSUI\\\\4G $22 95 $5.95 $1 20 00 sB-2473 BATTERY TEL NI-CD 3 6V 2BOMAH PACK TRI 5s 25$3 $1 $2 34 QC-371 6 $89 00 $45 00 sB 2472 BATTERY TEL NI CD 4 8V 2sOMAH PACK $209 OO $50 00 sB-2478 78 65$3 $1 $2 13 QC-3455 $34.95 $40 00 tMS-4016 BAITERY TEL PANASONIC FLIP BLK 0c-371 4 CAMEBA CCD B&W DOIVE DIN $79 95 $69 95 $55 00 tus-4014 FLTR MAINS INLINE CLOVERLEAF SURGE\/ND 50 95$14 $10 $3 55 $69 95 $1 8s 00 t\\\\4t 5100 0c-371 2 CAI\/EBA CCD B&W IR WLEAD&PSU $11995 $34 95 $r 0s 05 FLTB IV]AINS INLINE FIGS SURGE\/lNDICATOR s0 9s$2425 95$14 $10 $3 55 QC 3444 OAMERA CCD B&W l\\\\4TL - DIN IB $184 00 $1 00 00 N4P-3039 INVERTER ISOL ]OOW l2VDC\/23OVAC 5OHZ $6 $17 30 QC-3262 $1 09 95 $69 95 l\\\\\u00a1P 2900 45 50$6 $3 $2 95 0c-3704 IRCAMEBA CCD B&W PLAST - DIN $89 95 $69 95 $90 00 tvP-3095 PSU 12Vl8V AC 1A 45 50$6 $3 $2 95 0c-3702 WIRCAMEBA CCD COL DO[\/E 1\/3IN SONY $59 95 $1 79 05 PSU l2VDC 45OI\\\\1A UNBEG 2 sIVl\\\\4 PLG 0c-321 6 $369 OO $119 95 N4P-3073 PSU LAB 1 5-3OVDC 1A REG LASCAB 0c-3257 $69 95 $89 05 tvP-3076 PSU LAB 13 SVDC 5A BEG BIND POST QC 3255 CAMERA CCD COL IX ADDITIONAL SUITS OC-3260 $179 OO $84 9s $.184 05 tvP-3077 PSU LAB 13 BVDC 1OA REG BIND POST 95 95$44 $39 $5 00 0c-3271 IBCAMEBA CCD I\\\\\u00a1TL PIB - DIN $69 95 PSU LAB 13 SVDC ]54 REG BIND POSI IRCAIVERA CCD PLAST PIR - DIN $169 95 $99 95 $59 05 95 95$9 $7 $2 00 0c 3275 $69 95 $79 05 TVDC 2-]A 1 3MIM PLG KODAK WCIRLBCA\u00a1\/ERA CCD ROTATING B&W $]49 95 $189 00 $20 00 95 95$8 $4 00 0c-3454 $49 95 $1 60 00 oo$r99 $59 05 $299 OO $189 95 95$4 0c 3390 $219 9s $50 00 CAIVERA C[\/OS B&W IX ADDITIONAL SUITS QC-3255 $159 OO $59 05 $139 0c-3380 $5 50 $59 05 50 95$109 0c-3295 CAI\\\\\u00a1ERA CIVOS B&W TX WLESS & RECEIVER $269 OO $5 s0 $19 45 $85 $23 55 QC-3320 $5 50 $1S 45 50 95$r69 0c-3340 CAIMERA CN4OS COL2 4GHZ CH1 PSU SUIT OC-32\/O $129 OO $59 95 $19 45 $129 $39 55 0c-3342 $59 95 $s9 05 50 9s$189 CAI\\\\\u00a1ERA CIVOS COL IR 2 4GHZ CH4 SUITS QC.3274 $179 OO $59 0s $149 $39 55 QC-3344 $229.00 $70 00 00 95$15 $9 $5 05 0c-3322 WAUD&PSUCAIVERA CI\\\\\u00a1OS COL PINHOLE $89 95 $59 95 $30 00 QC 3324 PIXELCAI\\\\\u00a1ERA COL IP\/NETWORK 64OX48O $1 29 50 0c-3395 D9CAIMERA DIG PEN CI\\\\4OS RS232 WLEAD SKT $349 OO $1 49 50 0c-3384 $19 95 $30 00 QC-3254 38OTVLCAI\/EBA DOIVE V\/FOCAL F4 O-Fg OMIM $99 S5 $39 95 $40 00 LA-8907 $4 50 $10 45 LB-8831 4IVN\/CAI\\\\\u00a1EBA LENS AUTOIBIS S ID C\/CS F1 8 $249 OO $1 20 00 SL-3151 FLUOBO $17 95 $8 95 $9 00 $229 95 $79 95 $49 95 $30 00 LA-5087 ECONCAIMEBA LENS CS I\\\\\u00a1OUNT 4MM $279 OO $19 95 $40 00 SL-315S FLUORO TUBE 2FT 24OV 4OW BLK\/LITE 0v-3056 $9 95 $10 00 SL 2S89 GLOBE 24OV l5WTO SUIT SL-2986\/87 $6 70 $1.95 $4 75 L^-5474 ECONCAI\\\\4EBA LENS CS I\\\\4OUNT 6MM $24 S5 $14 95 $10 00 SL-2761 GLOBE EDISON 24OV 75W BLKLIGHT $9 95 $3.95 $6 00 0c-3457 $69 95 $1 29 55 SL-3209 GLOBE FLANGE HAL4SV5OOI\\\\44 $10 00 $4 05 LA 5162 ECONCAI\/EBA LENS CS I\\\\i OUNT BMM $24 95 $89 50 SL-3212 GLOBE TORCH 2 5V 4OOI\\\\\/A BI-PIN $1 20 $5.95 $0 85 0[\/-3402 $1 70 00 SL-2979 LIGHT SEI. PARTY 3IN1 SIBOBE\/BALL\/UV $s9 95 $0 35 $20 00 0tvl-3403 $24 95 $299 50 $300 00 s39.95 $10 00 Q[\/-3407 $269 00 SL-2967 MINI PAR HAL 12V 2OWW\/4LENSE\/PSU $2s s5 $19 95 $9 00 0tv-3\/51 CAMERA LENS WAUTO IB SID C\/CS F4O $11S00 $399 00 $60 00 SL-2960 SPOTLIGHT PAR36 24OV 6V\/3OW NO\/GLOBE $24 95 $15.95 $20 00 0c-3730 $500 00 ST-30\/9 TORCHCCFL\/XENON\/LED $39 95 $19 95 $30 00 LA 5025 CAMEBA LENS WAUTO IR STD C\/CS F8O $11900 $24 95 ST.3333 TORCH LED 1W 3AA ALU BLK $59 95 $29 95 $15 00 LA-5040 $ss 95 $15 00 ST-3324 TORCH LED WIMAGNIF 2AM ALU $29 95 $14.95 $10 00 CAMEBA USB PAN\/TILT WRE\u00cdMOTE SLV $2S9 00 $14 95 $20 00 ST 3O5B TORCH LEDX3 WHT HEAD\/CLIP $29 95 $1 9.95 $10 00 LA-5030 $89 95 $19 9s $15 00 $39 95 $29 95 WGAI\\\\4ESCAMERA WRIST WATCH PDA $89 00 $20 00 ST-3070 TOBCH LEDX3\/BI-PIN HEADLAN\u00a1P ADJ BEAI\\\\4 YEL $r2 95 LA-s035 $27S OO $595 00 $30 00 SL-3]BO TUBE KJT UV COOL 4COLX] sIV] WIiVIRE&CLIP QC 3372 4GHZCAMERA\/N\u00a1ONITOR CI\\\\4OS B&W WLESS 2 $49,95 $44 95 $204 00 0v-3066 ALARM)DETECTOB U\/SONIC TX\/RX\/CASE (CAR $189 00 $4s 00 LB-8864 DOOR LOCK CAR CENTBAL BIVII CTRI W2KEYFOB $79,95 $9S 95 $r60 00 0c-3392 ORGFLASHER CAR 2LED $79 05 5FiSECINTEBFACE CARD PCI VIDEO CAP-I 4CH $14 95 $1 99 95 $e9 0s QC-3208 289 00 110 00 $349 95 KEYPAD ALARIV & CTRLR FOR HOIV]ENEI SYSTEN,] $59 95 2OMLEAD CCD CA\u00cdVI EXT MINIDIN\/6P 6LEDLIGHT NIGHT WPIR & LIGHT SENSOR $19 95 B&W\u00cdM0N|TOR 10tN $24 95 ::,\u00eclilf!;\u00e5i!iildt 4CH[\/0N|TOR 10tN B&W $199 50 m:5654-TmSTl\u00f5T[E-3n5X30il32MMEe0N $12 95 $4 95 $8,00 $289 00 $l 34 05 OUTIVONIIOR 12IN B&W OUAD WOUAD RCA $259 50 AA-0434 AMP CAR 2X]5OWRI\\\\\u00a1S RE\/S $1s4 95 M-0438 AMP CAB 4XsOWRMS BE\/S IRI\\\\4ONITOR LCD TFT 7IN ROOFMOUNT 12V $599 50 LT-3019 BALUN INDOOR 75R\/3OOR RIBBON CABLE OUT $134 95 AR-1495 CD DRAWEB oODISC PLAST BIUE & WHITE $329 OO $0 75 IMONIIOR QUAD B&W W4 CAMERA IVTL CIV1OS $8S9 OO AB-1488 CD WALLET 56DISC ZIPPEB BLU 290X170X65 PBOTONPIB DEIECTOR OUAD SENSOB $11 95 PROTONPIR PULSE I\/ICROWAVE SENSOR $39 95 ANI-4082 I\\\\\u00a1IC l\\\\\/]ULTIMEDIA WLEAD PLG 3 5MM SWANNECK $5 9s AA-0340 IV]ODULE - 6W IVINI MONO N\/CPIR PULSE WBRKT 12V MICRON $79 95 AA-0360 I\\\\\u00a1ODULE - SURRND SOUND EXPERII\\\\4ENTERS $8 95 AR-]7]B REMOTE CTRL DYNAI\/O POWERED UNIV 4IN-1 SLV N\/OPIR PULSE WBRKT 12V MICRON $29 95 $12 95 CS-2432 SPEAKER BOX IN\/OUTDOOR 4R 25W BLK 3WAY PB $15 9s $39 95 OUAD PROCESSOB B&W WAUDIO DOIVESTIC $119 OO CS-2250 SPEAKEB CAR 4IN 2OWRMS 2WAY PR $19 95 HDDRECORDEB VIDEO DVR 1CH WAUDIO&]2OGB $7S9 OO C5-2254 SPEAKER CAR 5IN 2sWRMS 2WAY PR $29 35 4INPUTSENSOR PARKING WBEEPER&2SENSORS $89 95 CS-2218 SPEAKEB CAR TWEET SUPER DON\u00a1E ]IN 4OW IVYLAR $10 95 VIDEO CAPTUBE IP\/NETWORK $34S OO $12 95 DIGVIDEO PANNING IVOTOB WCTRL SUII CAIM 5OOG $179 OO AS-3150 SPEAKER CAR\/BOXES 4IN 4R PR VIDEO SWITCHER B&W 4CH $29S OO $3 15 CF_2765 SPEAKER CLIP GRILLE PLAST SHT PKB $6 95 V\u00a1DEO WEB SERVEB (IP\/NETWORX) 2OH WP$U AX-3540 SPEAKEB CLIP GRILLE SKP KIT $0 75 $1 9s t\\\\\/tP 3070 BATTERY BANK NI MH FOR DIG CAIMEBAS s99 95 $39 95 $60 00 CF-2766 SPFAKER CLIPGRILLE PLAST LNG PK8 $0 65 [\/B-3520 $39 95 $25 00 $39 95 tvB 3535 BATTERY CHGR CAR 12V@4A AUTO WCLIPS $34 95 $1495 $19 00 CG-2380 SPEAKER PA 12IN 8R lOOWRl\\\\\u00a1S CARDBOARD $29 95 MB-3566 BATTERY CHGR NI CD\/NI IVH FAST 4AA\/AAA 12V $12 50 $15 95 $2 95 MB 3565 CHGR ADPT SUITS MB-3550 IVC;CAN0N;PANAS0NIC $12 50 $7 55 AI\\\\\u00a1-4054 SPEAKER PA PERSONAL 5W ECON $BS 95 MB-3582 CHGR ADPT SUITS M8-3550 -SHARP:HITACHI;S0NY $44 9s $4 95 $7 55 $29 95 IVB 3584 BATTERY CHGR WCR]23\u00c1ICIG PLG & ADPT $59 95 $4 95 $25 00 CX-2695 SPEAKEB PORT 1 lOIV\u00ecIM ADJUSTABLE $184 95 sB-1 621 BATTERY CHGR WCRV3\/CIG PLG & ADPT $19 95 $35 00 CS 2246 SPEAKER SUB ]2IN 4R CARBON RE\/S $39 95 sB 1 740 BATTERY LITHIUI\\\\\u00a1 BACKUP CR243ORH 3V $4 95 $24 95 $2 45 $29 95 sB-1742 $19 95 $2 50 $12 45 CS-2240 SPEAKER SUB 6 sIN 4R BOWR\u00a1,4S CARBON RE\/S $1 95 sB-2463 BATIERY LITHIUIV CB123A 3 6V 6OOI\\\\\u00a1AH $29 95 $7 50 $15 00 CS 2228 SPEAKER SUB D\/IVIAG 12IN 4R l5OWR\u00a1\/S RE\/S $39 95 sB-1630 BATTERY LITHIU[\/ CRV3 3 6V ] $14 95 $4 00 C5-2465 SPEAKER SURRND 3PCE ADD-ON PACKAGE 25W BLK $99 9s sB-1 632 BATTEBY NI-CD ]\/2SUB C ].2V $B 95 $4 95 $1 75 $69 95 sB-2470 $4 25 $2 50 ]924CT SPEAKEB TWEET PIEZO BULLET 4OOW KSN1165A $3 95 sB-1 71 0 BATTEBY NI-CD AA 1 2V 6OO[\/AH $4 50 $2 95 $1 55 $1 25 sB-2450 BATIEBY NI CD AA 1.2V 6OO[\/AH $0 85 $2 30 AS-3020 SPEAKER WIDE 2IN\/53MM 4R $3 l5 $4 95 $B 00 BATTERY NI-CD BUTTON ] 2V 28( $9 95 $e 55 AC-]6S0 SWITCH AV 4IN\u00a1OUT WRF MODULATOR $12 95 LT-3280 TV AftllP\/SPLIT lND00R F-TYPE WPSU 30DB+ $19 50 LT-3286 TV AMP\/SPLIIIER INDOOR 4WAY 24OV GIUE LT-3121 TV ANIENNA RABBIT EARS lOO4IVM EXTENDED LT-3]28 TV ANTENNA IELESC SWIVEL RECI BASE 1O3OIV]I\\\\\u00a1 \\\"Off original RRP Limited stock, n0 rainchecks, may not be available at all stores - call vour local store to check stock details FOR INFORMATION AND ORDERING","-) lloGat Desctiption 0rlginal llow *Save on Cat llo DescriptioI original llow *SaYe on RRP 0r\u00a1g RRP RRP 0ris RrP xc-50s9 FAN BON4M WITH BLUE CCFL & INVERIER $7 B0 $11 95 $B 00 PL-0948 LEAD COMPUTER IDE ATA1OO 3SKT RND 48OIVM BLK $24 95 $9 95 $1s 00 xc-503s FAN CPU COOLER BALL\/B HEAISINK K6\/CYRYX $19 95 $24 S5 $10 00 PL-0972 LEAD COI\\\\4PUTER IDE ATA133 3SKT RND 6OOIVII\\\\4 BLU $24 9s $9 95 $15 00 xc-5053 FAN GUARD 8OMIVl PERSPEX WITH TRI-COL LED $34 95 wc-7620 LEAD COIMPUTER IEEE1284 D25 - CENT 2IV1 $22 50 $9 95 $12 55 xc 5033 FAN TII\\\\\u00a1ER\/CTRL ]OIVIN I\\\\\u00a1AX SUIT 2PC FAN $18 95 $9 95 $9 00 LEAD COMPUTEB IEEE]284 D25 - CENT HPCN36 2M $22 50 $6 95 $15 55 xc-50s8 HEATSINK ALU lOFIN 82X32\u00a1\/M $12 95 $4 00 \\\\\u00a1ic 7628 LEAD COIVIPUTER KEYBRD DIN\/5P PLG - SKT 1 8IVI $4 95 $3s 95 $8 95 $2s 00 wc-7530 LEAD CON4PUTER LAPLINK PAR PLG\/PLG D25 1 8M $7 30 $5 95 $3 25 IHH-851 LASCAR DATALOGGER EL USB-1 $14 95 $1 45 wc-7512 LEAD CO\u00a1\/PUTER I\\\\4INIDIN\/8 PLG-PLG l\\\\\/AC PTR 1 8M $9 20 $6 95 $3 0s $2 70 $50 00 $10 00 $9 95 $7 00 0P-601 2 LED 3IVM CtR BI-COL RED\/GRN $1 49 00 $1 25 $0 48 WC-7548 LEAD ETHERNET BNC ]Ol\\\\\u00a1 $16 95 $4 95 $2 00 tD-1739 $99 00 $2 00 PL 0937 LEAD ETHERNET BNC 2\u00a1\/ $6 95 $6 95 $3 54 zD-0194 LED 5MM CLR WHITE ]OOOOIV]CD $0 73 $17 00 PL-0939 $10 49 $4 75 $2 00 7D-2022 LED PINK KIT TOSUIT NOKIA N\u00a1OBItE PK6 $3 Ss $0 2s PL-0938 LEAD ETHERNET BNC 5l\\\\\u00a1 $6 75 $6 75 $10 00 QP-2272 $24 95 $1 95 $s5 01 $16 75 0tv-1665 N\u00a1ETAL DETECIOR HANDHETD $69 95 $7 95 $90 00 wu 7424 LEAD GAMF N64 EXT R2C 1 8I\\\\\u00a1 0P-5035 METEB CARBON I\\\\\u00a1ONOXIDE LCD, BEEPER & BAG $229 00 $s4 94 $50 00 wv-7420 LEAD GAIME PLAYSTATION CTRLR EXI 1 8M QP-5030 I\\\\\u00a1ETER INDASH ANLG 2XVU & lXVOLT BLUE $89 9s $13S 00 $11 00 wv-7428 0P-5032 I\\\\4EIER VOLIAGE PNL ANLG O-25V BLUE $19 95 $s9 95 $11 00 LEAD GAI\\\\4E PLAYSTATION PLG 3\u00ceLG,B!A.]-JM YM-2705 $19 95 $8 95 NS-3032 METER VU ANLG BLUE $2 95 $8 95 $1 10 $19.95 $33 95 $1 85 $e 00 PP-0636 MOTOR 3VDC 225ORPl\\\\\u00a1 $5 s5 $24 S5 $3 60 sT-3029 BABY COT LIGHT SOUND ACTIVATED WHITE $r9 95 $6 95 $13 00 PP-0720 PEN PCB SILVER CONDUCTIVE 8 59 1\u00a16IN $29 35 $1 95 $r5 00 PP 1190 PLUG LINE Sf\\\\\u00a1A MIL GLD RG58U SOLDER $1 70 $14 95 GT-3OOB $24 95 $9 S5 $.10 00 PP-] 1 94 9220 $0 50 $l 20 $19 ss PLUG OBD (Jl962) WgPIN $0 60 QM-7252 $8 9s $21 00 PP-1 2OB PLUG PCB IN41612 32WAY BOW A&C $3 l0 $1 25 $1 60 0c-3224 $5 95 PL 0929 $6 95 $1 85 $9 95 $189 95 $1 09 05 Pt-6482 PLUG PCB DIN41612 4BWAY ROW A&B&C $14 s0 $7 55 $49 95 Pt-6626 PLUG PCB DIN41612 96WAY R\/A ROW A&B $r5 95 $5 S5 $10 00 0c-31 98 $14 95 $54 95 $20 00 $1 25 $1 40 0c-3242 QP-2262 SLOT CARD PC 2SKT USB A.2 SKT MB\/sP $2 6s $6 95 $6 5s 0c-3240 $1 19 95 $79 05 QP,2275 $13 50 $9 95 TH-1 875 SOCKET IC ZIF 24PIN UNIV $19 95 $9 95 $10 00 $109 95 $79 05 TH-1 882 SOCKET PLCC S\u00a1\/D 52PIN $r9 95 $6 50 TESTER AUTOMOT\u00ecVE ALTERNATOR & BAIT $19 95 $10 00 sT-3923 $3 25 $225 sT-31 1 4 TESTER DETECTOR N1IL & VOLIAGE $9 50 $11 95 $3 00 COAX TOOL- CUTTEB\/STRIPPER\/CRII\\\\\u00a1P DIY $29 95 $19 95 sT-3926 $2 45 $3 50 fH 2324 $29 95 $10 00 rD-2140 CIJTIERS JAYIECH BUDGET $36 95 $24 95 $18 00 sT-3920 $B S5 $6 00 LASER LEVEL DOT\/BAR BEAM 7IN W\/IRIPOD $3S 95 $14 95 $1\/ 00 sT 3922 ID-2142 $24 95 $15 00 GH 1100 $15 9s $1400 TD-2054 PLIERS STIPJOINT 12IN S\/S MiGRADE $14 95 $9 95 $10 00 TS 13s2 RATCHET BOX-END FLEXiBLE 1 OX1 1 MIVl $9 95 $6 95 $18 00 TS-1 362 $14 95 $9 95 $5 00 TS-1 365 RATCHET BOX'END FLEXIBLE ] 2X1 3l\\\\4I\\\\\u00a1 $14 9s $3 95 GT-3037 $9 95 $20 00 TS-1 401 $13 95 $3 95 $s 00 TS-t 403 SCREWDRIVER 7IN1 WTORCH LIGHT $13 95 $5 95 $5 00 GT-3039 $9 95 $20 00 TS 1692 IIP IWFI ITR\u00ec 1 6IVN\/ FI AT PIA6 31sDIGC $13 2s $r 45 $10 00 Gt 3038 TS-1 4l 1 rip iwriL\u00c8ni r olt\u00a1H\u00a1 r Lnr pTAT 370DtGC $10 00 $9 95 $20 00 TH-1 866 $4 95 $1.45 $7 30 rp iwrrrrRi L6N\u00a1M FLAT PTAB 430DEGC $7 05 $1 75 $3 50 GT-3032 $9 95 $20 00 ITH-1 81 lp \u00f2 s\u00a1\u00a1\u00a1\u00a1 rb sulr ls-r\u00a1oo sOLDtBtN0 IRON $2 s0 $9 S5 $s 60 s22 S5 $0 75 GT-3031 $9 95 $20 00 TH-23r 4 TIP 3 2IVM TO SUIT IS-1400 SOLDERING IRON 11 $13 00 TIP CATALYST TO SUIT TS-1685\/90 S\/IRON GT-3034 $9 95 $20 00 1 TIP CONICAL TO SUJT TS-1415 S\/IBON Gt 3033 $9 95 $5 00 TIP TO SUIT TH-1865 SOLDER SUCKER GT-3030 $9 95 $20 00 TOOL EXTRACTOR V SHAPE IC B-28PIN WRENCH ADJ lOIN S\/S [\/\/GRADE GT-3036 $9 95 $20 00 WRENCH xc 01 60 $10 95 $19 00 xc 0159 $7 75 $7 20 AR-1 732 $12 9s $17 00 xc-01 70 $69.95 $29 05 GH-1525 $39 95 $20 00 GH-1 1 52 $6 95 $8 00 GH-1 377 $31 95 $13 00 TH-21 39 GH 1018 $1495 $5 00 xL-2512 $4 95 $5 00 $6 95 $7 00 GH-1 060 $24 95 $15 00 GG-2265 $9 00 $15 95 5 25tN-3 5tN 95 95$8 $4 $4 00 GG 2260 $11 45 $B 50 95 9s$29 $14 $1s 00 XC-s]O] CARD READER GS\u00a1\/ SUPER RS232\/D9 WCD 00 95$69 $34 $34 05 xc 0190 $29 9s $30 00 95 35$69 $44 $25 00 XC-4812 CARD READER USB e5 95$59 $39 $20 00 xc-01 96 $8 95 $21 00 H8-6367 CASE LAPTOP ALUI\\\\\u00a1INIUN\u00a1 l\\\\IEDIUM 95 95$29 $23 $6 00 GH-1 059 HB 6369 CASE LAPTOP ALU\u00a1i INIUN\u00a1 S\u00cdMALL 00 75$1 $0 $0 25 GG 2122 $12 95 $12 00 XC-4726 CDR TOOI\\\\4B\/BON\/IN SLV lOOPCE s5 95$69 M4 $25 00 95 9s$14 $s $9 oo GH-1052 $69 00 $1 20 00 XC-4705 CDR AUDIO DATA BOI\/IN WJEWEL CASE 95 95$r3 $8 $5 00 XC 4831 CONVERTER PC USB IR 95 9s$39 $19 $20 00 GH-1300 IVIIXER\/CREAl\\\\\/ER\/VCLEANER 3IN1 CORDLESS $9 95 $15 00 XC-5140 SI\u00cdU CARD SWITCHER COVER FOR NOKIA 3310 GG 22s0 \u00a1\/1UG FROIHER\/MIXER 2AA XC-4742 DISK 3 5IN IIMB sCOL PK25 s5 95$64 $34 $30 00 $9 95 $10 00 XC-4648 FILTER MONITOR 19-21IN GLASS BARGAIN GI 327s NON-SLIP N\/AT CAR BLACK 70 95$6 $3 $2 \/5 NOVELTY IURNTABLE KEYCHAIN DJ SCBAICH $2 95 $3 00 \u00cec 2+7os rLASH DrsK usB 64MB wcARD READER usB LR-8867 PARKING SIGNAL U\/SONIC W3LIGHT PEN LED GLOWLIGHT PUSH UV $4 95 $5 00 XC 4632 HARDWARE KIT SUIT PC WBBKT&FEET sT-3063 XC-48]5 HUB USB 4PORT I\\\\\u00a1INI UNPWRED $24 95 $25 00 XC-5135 KEYBOARD\/[\/OUSE WLESS PSi2 SLV&BLK 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Douglas Self 3rd Edition 2002 by John Mofion - 2nd edition 2001 From one of the world's most respected audio authorities. Concise and practical guide to getting up and running with the New edilion is more comprehensive than ever with a new PIC Microcontroller. Assumes no prior knowledge of micro- chapter on Class G amplifiers and further new material controllers, introduces the PIC's capabilities through simple on output coils, thermal distorlion, relay distortion, projects. ldeal iritroduction for students, teachers, tech-ni- ground loops, triple EF output stages and convection cians and electron\u00eccs enthusiasts. 270 pages in soft cover. cooling.427 pages in paperback. AUDIO ETECTROilICS Prcctical Variable Speed Drives and By John Linsley Hood. First published 1995 Power Electronics by Malcolm Barnes. lst Ed, Feb 2003. Second edition .1999. An essential reference for engineers and anyone who wishes For anyone involved in designing, adapting and using analog to design or use variable speed drives for induction motors. and digital audio equipment. Covers tape recording, tuners As reviewed in SlLlC0N CHIP September 2003 288 pages and receivers, preamplifiers, voltage amplifieis, audio power Microcontroller Projects in C for the amplifiers, compact disc technology & digital audio, test & 8051 by Dogan lbrahim. Published 2000. measurement, loudspeaker crossover systems, power sup- plies and rioise reduction systems. 375 pages in soft cover. Through graded projects introduces the fundamentals of microelectronics, the 8051 family, programming in C and AirAr.0G EtEcTR0ilrcs the use of a C compiler. Provides an interesting, enjoy- able and easily mastered alternative to more theoretical By lan Hickman.2nd editionl999. textbooks.178 pages in paperback. Essential reading for electronics designers and students alike lt will answer questions about core analog theory and design principles as well as offering practical design ideas. l\\\\4any of the circuits taken from lan Hickman's magazine afiicles. 294 pages in soft cover By Eugene Trundle. Revised edition 2002. Power Supply Gookbook Written by a practising service enginee\u00a1 emphasis is on practical by Marty Brown. 2nd edition 2001. An easy-to-follow, step-by-step text for a wide variety of business of fault diagnosis and repair. Covers W power supplies, power supplies. All described in simple language. Anyone line timebases, video deck machines, test gear, interm\u00a1ttent with a basic knowledge of electronics can create a very com- faults, repair techniques and workshop practice Features a plicated power supply design. 265 pages in paperback. -completely new chapter on the latest digital equipment Electric Motors And Drives DVD, set-top boxes, digital satellite TV and digital TV sels. by Austin Hughes. 2nd edition 1 993. (Rep 2001 ). lnterfacing W\u00a1th C by Howard Hutchinss For non-specialist users - explores most of the widely-used Revised by Mike James. 2nd edition 2001. modern types of motor and drive, including conventional Anyone interested in ports, transducer interfacing, ana\u00a1og to and brushless DC, induction, stepping, synchronous and digital conversion, convolution, filters or digital\/analog conver- reluctance motors. 339 pages, in paperback. .sion will benefit from reading this book. The principals precede the applications to provide genuine understanding and DVD PTAYERS AilD DRIVES encourage further development. 302 pages in paperback. by K.F. lbrahim. Published 2003. PRACTICAT RF HAilDBOOI( A guide to DVD technology and applications, with particular , by lan Hickman 3rd Edition 2002 focus on design issues and pitfalls, maintenance and repair ldeal for engineers, technicians, students of consumer elec A guide to RF design for engineers, technicians, students and tronics and sales and installation staff. As reviewed in enthusiasts. Covers all of the key topics ln RF: analog design Chip February 2004. 319 pages in principles, transmission lines, couplers, transformers, amplifiers, oscillators, modulation, transmitters and Complete Reference Red Hat receivers, propagation & antennas 279 pages in paperback. by Petersen and Haddad Published 2004 lf you're into Linux you've got to have this latest for Everyone omnibus reference covering Red Hat Enterprise Mancini Published 2003 Linux and Fedora. Great for iniernet server man- Texas lnstruments, this is the closest thing agement, firewalls, encryption, authentication and op amps. This is an engineer's reference more Includes DVD. 832 pages, soft covers. theory, plenty of maths and right up-to-the- modern devices. Not cheap but wofih every soft covers. SCIEI{TISTAMATEUR Many thousands of copies now sold. Contains over 1000 projects, sourced from Scientific American over TWll{ CD SET past 70 years. See review 0ctober '04 issue or online. 2 CD set - perfect gift for a young, enquiring m(nd!"]