Timstar - International Catalogue 2019-20

Locktronics ELECTRICITY & ELECTRONICS Locktronics Components Ammeters Voltmeters These moving coil meters are fitted onto a large carrier and provide an easy visual reading of both voltage and current. These moving coil meters are fitted onto a large carrier and provide an easy visual reading of both voltage and current. LK109381 Range £27.44 ea LK108397 £33.06 ea 0-100 mA 0-1A Range Semi Conductors LK103982 0-15 V £26.19 ea LK109438 -7.5 V-+7.5 V £28.06 ea Resistors LK95211 A Size Type £4.45 ea AB LK94025 B £3.84 ea LK95217 Small Resistor - 3.9 Ω, 3W, 5% £3.66 ea Size Type LK94100 C Small Resistor - 10 Ω, 1W, 5% £3.90 ea LK94002 D Small Resistor - 68 Ω 12W, 5% £3.74 ea LK95242 Small Diode (OA91) £6.21 ea LK95206 Small Resistor - 12 Ω, 1W, 5% £3.33 ea LK95243 Diode (IN4001) Power 50V £3.63 ea LK95207 Small Resistor - 100 Ω, 1W, 5% £3.56 ea LK95245 Small Diode (IN4004) £3.33 ea LK95215 Small Resistor - 120 Ω 12W, 5% £3.33 ea Zener diode (4.7V) £4.16 ea LK95205 Small Resistor - 180 Ω 12W, 5% £3.56 ea Small Zener diode (6.8V) £5.20 ea LK96237 Small Resistor - 220 Ω 12W, 5% £3.33 ea LK95247 A Small Zener diode (8.2V) £5.68 ea LK96219 Small Resistor - 270 Ω 14W, 5% £3.38 ea LK95253 Bridge rectifier (1N4001) £8.68 ea LK95202 Small Resistor - 500 Ω 14W, 5% £3.33 ea LK95254 Small Transistor LHF - NPN £9.61 ea LK96218 Small Resistor - 560 Ω 14W, 5% £3.38 ea Transistor RHF - NPN £9.07 ea LK95209 Small Resistor - 1K, 14W, 5% £3.56 ea Small Transistor RHF - PNP £9.59 ea LK95203 Small Resistor - 2.2K, 14W, 5% £3.33 ea LK95266 B Large Photodiode (SFH217) £8.66 ea LK96211 Small Resistor - 5.6K, 14W, 5% £3.33 ea LK95241 £3.33 ea LK95201 Small Resistor - 10K, 14W, 5% £3.56 ea LK95240 Large £5.07 ea LK96231 Small Resistor - 22K, 14W, 5% £3.33 ea £8.14 ea LK95218 Small Resistor - 33K, 14W, 5% £3.63 ea LK95255 Large £5.84 ea LK96212 Small Resistor - 50K, 14W, 5% £3.33 ea £5.56 ea LK96238 Small Resistor - 100K, 14W, 5% £3.38 ea LK117361 Large £4.93 ea LK96201 Small Resistor - 150K, 14W, 5% £3.33 ea £4.93 ea LK96232 Small Resistor - 200K, 14W, 5% £3.69 ea Small £5.35 ea LK96200 Small Resistor - 330K, 14W, 5% £3.63 ea £5.26 ea LK95210 Small Resistor - 500K, 14W, 5% £3.38 ea Miscellaneous £20.56 ea LK95252 Small Resistor - 1M, 14W, 5% £3.63 ea £8.90 ea LK95212 Small Resistor - 1.5M, 14W, 5% £24.31 ea LK95250 Size Type LK95208 Small Resistor - Rx £32.44 ea LK95251 LK94034 Large Resistor - variable, 25 Ω £16.81 ea LK97936 Small Connecting Link LK95214 Large Resistor - variable, 250 Ω £13.69 ea Large Crossover link LK95219 Large Resistor - variable, 1K £12.38 ea Small Fuse /universal component carrier LK95213 Large Resistor - variable, 10K £15.56 ea LK95401 Large Resistor - variable, 100K £7.50 ea Optoelectronic and Light/Lamps LK95402 Large Resistor - variable, 1M £7.50 ea Small Thermistor 470 Ω, NTC B Size Type Small Thermistor 47K, Ω, NTC LK95287 Small Automotive lampholder LK95291 A Small Lampholder LK96432 LED - green, 12V Small LED - red, 5V LK96635 B Small LED - green, 5V LK96636 LED - yellow, 5V A LK96637 Small Solar cell Phototransistor LK97746 Small LK160100 C Small C A B D C +44 (0) 3333 442 443 [email protected] timstar.com 249

ELECTRICITY & ELECTRONICS Locktronics Locktronics Components continued Electromechanical Blank Carriers LK95900 Size Type £54.94 pk LK96706 Size Type £18.69 ea LK95800 £57.44 pk LK94102 Large £13.69 ea LK97215 A Large Blank carrier - large , pack of 10 LK95403 A Large Motor - 3/6V DC, 0.7A £29.94 ea LK97216 Small Blank carrier - small, pack of 20 £3.08 ea LK97889 Large Motor - open frame, 6V £33.69 ea LK98013 Small Blank DIN resistor carrier £3.08 ea LK95405 Large Relay 6V 10A (transparent case) £33.06 ea LK97217 Small Blank capacitor carrier £2.86 ea LK96633 B Small Relay 6V 10A changeover £12.31 ea LK97218 Small Blank diode carrier £3.14 ea LK96207 C Large Relay - reed £5.31 ea LK95404 Small Switch, on/off £6.48 ea B Small Blank electrolytic capacitor carrier LK96632 Switch Press (morse key-type £9.11 ea Large Blank NPN transistor carrier £5.20 ea LK96224 Small strip, push to make) £20.56 ea £6.93 ea LK96838 Large Switch, reed £13.06 ea AB £4.11 ea LK96208 Large Switch, reversing £57.44 ea £4.04 ea LK96634 Large Switch, toggle (SPCO) £12.28 ea £4.33 ea LK96209 Large Solenoid £12.45 ea £6.04 ea LK96423 Large Switch, changeover £8.35 ea £11.84 ea Small Microswitch £14.31 ea £10.00 ea Switch on/off (stay put, sideways £13.06 ea Small swivel strip) £21.19 ea Buzzer (6V, 15 mA) £19.31 ea Capacitors AC £10.16 ea LK96205 Size Type £10.16 ea B LK96217 LK95221 Small Capacitor, 1 µF, Polyester £8.82 ea LK95224 Small Capacitor, 2.2 µF, Polyester £16.81 ea LK96202 Small Capacitor, 10 µF, Electrolytic, 25V £46.19 ea LK96223 Small Capacitor, 47 µF, Electrolytic, 75V £32.44 ea LK95223 Small Capacitor, 100 µF, Electrolytic, 25V £32.44 ea LK96203 Small Capacitor, 150 µF, Electrolytic, 25V £32.44 ea LK96653 Large Capacitor, 1,000 µF, Electrolytic, 16V £32.44 ea LK113662 Large Capacitor, 2,200 µF, Electrolytic, 25V £32.44 ea LK116214 Large Capacitor, 4,700 µF, Electrolytic, 16V Large Capacitor, 22,000µF, Electrolytic, 16V Large Capacitor, Variable, 0-200pF Power Supplies Size Type £10.00 ea LK97461 A Large Power supply carrier with £10.00 ea voltage source symbol £25.56 ea LK98275 Large Power supply carrier with battery £15.56 ea symbol LK99218 B Adjustable power supply with battery symbol carrier LK180220 Plug-top PSU AB Inductors Type Size Choke, 5 mH LK96214R3 Small Choke, 10 mH LK96214R1 Small Choke, 47 mH LK96214R2 Small Choke, 68 mH LK96215 Small IC (Analogue) Baseboards and Spares LK96234 Size Type LK98900 Type £53.69 ea Large Op Amp module (TL081) LK93000 £44.94 ea LK93293 A 7 x 5 pillars Logic Gates - CMOS LK93288 B 4 x 4 pillars with battery holders £1.19 ea LK98615 £1.58 ea Pillar and bolt £1.30 ea Battery contact spring Battery retaining clip LK96870 Size Type AB LK96873 LK96874 Large AND’ - 0V lead, spade connector LK96872 Large NAND’ - +5V lead spade connector LK96871 Large NOR’ - +5V lead spade connector Large NOT Large OR’ - +5V lead spade connector 250 More products and offers available on our website!

Creating Bright Sparks Timstar and Locktronics have been working Electricity Matters workbooks that guarantee together to bring you two workbooks to your students gain a firm understanding simplify the teaching of Electricity. Each of the basic concepts and relationships in workbook is packed full of useful resources Electricity. including: worksheets, quizzes, a teacher’s guide and a student handout. Ensure that your students excel when studying electricity, download your copies today by Expand your range of learning materials and simply keying into your web browser: save time spent on lesson planning with the timstar.co/creatingbrightsparks

ELECTRICITY & ELECTRONICS Leads Stackable Plug Leads, 2 mm High Quality Stackable Leads, 4 mm Length of flexible wire covered in colour coded P.V.C. terminated at each Schutzinger brand professional quality 4 mm stackable test leads, end with a 2 mm in-line stackable plug. Sold in packs of 5. utilising 1 mm2 double insulated highly flexible PVC cable and terminated at each end with a stackable 4 mm plug. • Cable: 1.0 mm2 double insulated PVC • Plugs: Nickel plated brass body & lamella basket spring • Plug length: 48 mm • Voltage: 33 V AC / 70 V DC • Current (max): 16 A EL06571 Colour Length ✓ £11.24 pk EL150500 Colour Length £3.79 ea EL06572 ✓ £11.24 pk EL150502 £3.79 ea EL06573 Black 10 cm EL150504 Red 250 mm ✓ £4.13 ea EL06574 Red 10 cm £11.86 pk EL150506 Black 250 mm ✓ £4.13 ea Black 30 cm £11.86 pk EL150508 Red 500 mm £4.44 ea Red 30 cm EL150510 Black 500 mm £4.44 ea Red 1000 mm Black 1000 mm Stackable Plug Leads, 4 mm Shrouded Leads These quality plug leads come with 4 mm stackable, insulated plugs Shrouded Safety Leads and extra flexible 0.75 mm, 95/0.01 mm sheathed copper cable, which is rated at 15 A/60 V DC. Supplied in packs of 5. High quality leads with 4 mm stackable shrouded plugs at each end. Max current 12 A. Length 15 cm. EL180700 Colour £2.44 ea EL180702 £2.44 ea Red Black EL120585 Colour Length ✓ £6.50 pk EHT Leads EL120610 ✓ £6.75 pk EL120615 Red 250 mm ✓ £6.75 pk 5kV lead. 50 cm length. EL120590 Red 500 mm ✓ £6.50 pk EL120595 Black 500 mm £6.50 pk Colour Length EL120600 Black 250 mm ✓ £6.50 pk EL120605 Blue 250 mm £6.50 pk Red 50 cm EL120620 Yellow 250 mm ✓ £6.75 pk Black 50 cm EL120625 Green 250 mm £6.75 pk EL120630 Blue 500 mm ✓ £6.75 pk EL120635 Yellow 500 mm ✓ £8.35 pk EL120640 Green 500 mm £8.35 pk EL120645 Red 1000 mm ✓ £8.35 pk EL120650 Black 1000 mm £8.35 pk EL120655 Blue 1000 mm £8.35 pk EL91360 £8.13 ea Yellow 1000 mm EL91362 £8.13 ea Green 1000 mm Lead holder for 4mm leads, Steel Plug To Socket Leads Sturdy lab lead holder for wall mounting, using A high quality extension lead consisting of highly flexible 384/0.05mm 2 screws. The holder is made from painted silicone cable terminated at one end by a standard 4mm plug and a steel, with 13 slots, and can accommodate 4mm line socket at the other. approximately 50 leads (leads not supplied). Dimensions 260 W x 82 D x 15 H (in mm) EL170952 £18.69 ea EL130956 Colour £5.53 ea EL130957 £5.53 ea 252 Red Black More products and offers available on our website!

Leads ELECTRICITY & ELECTRONICS Crocodile Clips Oscilloscope Accessories Plug To Crocodile Clip Leads BNC Connecting Leads & Adapter Extra flexible leads with a 4 mm stackable Leads come ready assembled with moulded-on strain reliefs. plug at one end and a standard crocodile clip at the other. Length: 30 cm. Supplied in packs of 5. EL101412 Colour £10.77 pk EL101414 £10.77 pk Red Black Crocodile Lead Pack, Red & Black Type Vinyl covered crocodile clips, in packs of 20 (10 black and 10 red). BNC Plug to BNC Plug Length 46 cm. BNC Plug to Crocodile Clips BNC Plug to Stackable 4mm Plugs EL18512 BNC Plug to 4mm sockets £4.94 ea EL18513 £7.44 ea EL18514 £10.31 ea EL18516 £6.56 ea EL170700 ✓ £6.73 pk 3.5 mm to 4 mm plug leads A 3.5€mm headphone plug connected to 2x€4€mm plugs, for taking audio output from an MP3 player, phone etc. Approximately 65€cm long. Crocodile Lead Pack, Assorted Colours EL160100 £8.74 ea Set of 10 leads, in five assorted colours. Terminated at each end with a USB Cables vinyl sleeved crocodile clip. High speed USB 2.0 shielded cables for connecting computers and hardware. Data transfer rate of up to 480 Mbps. Also compatible with USB 1.1 devices. EL06567 £3.63 pk Crocodile Clips EL101392 Type Length £3.85 ea EL170394 £3.98 ea Nickel plated steel.Takes a 4 mm plug. 10 EL170396 Male A to Male B 2m £3.81 ea A max current. EL101396 Male A to Male mini-B 2m £3.89 ea Male A to Male micro-B 2m Male A to Female A 3m USB-to-Serial Cable (DB9 female) A high-end USB-to-serial adaptor cable, which converts an available USB 1.1 or 2.0 port into a serial port, allowing equipment with an RS232 interface to be connected to computers via a USB port. The Quantity active electronics are enclosed in the cable, and it is powered by USB, EL06565 £1.24 pk so no additional adaptors or power supplies are required. Based EL06566 10 £12.91 pk on a FTDI USB UART chip, the cable features COM retention, which 100 means the COM port value is automatically reassigned if the cable is disconnected and reconnected, or the computer rebooted. Compatible with Windows®, MacOS and Linux. Crocodile Clips, Insulated ••••• 1 m cable rate Nickel plated steel with a PVC shroud to prevent accidental short USB Male A plug circuits. Connection is via permanently attached wire of maximum 1 DB9 female socket mm thickness. Sold in packs of 10. 921.6 kbps max baud 2 year warranty • Current rating 5 A max • Jaw opens up to 7 mm • 43 mm length EL18502 Colour £0.61 pk EL170232 £39.94 ea EL18500 £0.61 pk Red timstar.com 253 Black +44 (0) 3333 442 443 [email protected]

ELECTRICITY & ELECTRONICS Plugs ● Sockets Banana Plugs 4 mm Stackable Plugs Solder connection, 4 mm pin. Socket in the top providing an in-line Pack of 5. stackable facility. The lead wire is clamped in position by a screw located at the bottom of the socket. Sold in packs of 5. EL066080 Colour Diameter £2.44 pk EL06590 Colour ✓ £5.09 pk EL066081 £2.44 pk EL06591 ✓ £5.09 pk Black 4 mm EL06592 Black Red 4 mm EL06593 Red £5.09 pk EL06594 Green ✓ £5.09 pk Stackable Plugs EL06595 Yellow Blue £5.09 pk White £5.09 pk 4mm Stackable Plugs, Economy Transverse Hole Plugs An economical range of 4 mm stackable plugs, available in a range of Connected by screw terminals, 4 mm pin colours. The wire must be soldered into the plug. For a video guide, go with 4 mm cross hole. In packs of 5. to timstar.co/SolderingEconomyPlugs Sold in packs of 10. •••• Brass body nickel plated spring EL066085 Colour £3.73 pk Beryllium copper, EL066086 £3.73 pk PE housing Black 3.5 mm cable Red ••• diameter A B C 4 mm socket to 2 mm plug Adapters Solder contact Length 45 mm - These adaptors convert a 4mm straight plug to a 2mm banana plug. Voltage: 30 V AC They have a nickel plated brass spring and are housed in ABS. 60 V DC • Maximum current • Current rating: 32 A rating 19 A • Voltage rating AC: 30 V D E • Connector type: Banana plug to straight socket • Contact material: Brass EL164000 Colour ✓ £2.42 pk • Contact plating: Gold EL164002 £2.42 pk • Insulator material: ABS EL164004 A Black £2.42 pk • Length: 44.9 mm EL164006 B Blue EL164010 C Green ✓ £2.42 pk EL170420 Colour £2.49 ea D Red ✓ £2.42 pk EL170422 £2.49 ea E Yellow Red Black Sockets Insulated Sockets Terminal Sockets Safety sockets designed to accept A 4 mm screw-socket which can be mounted on to panels up to 12.7 sprung 4 mm plugs. Cable diameter mm thick. Supplied in packs of 5. can be up to 5 mm diameter and •••• cable connection requires soldering. Current: 10 A max mm Nickel plated brass socket with PVC Height above panel: 24-32 insulated housing. 14 mm outer diameter Thread size 4BA • Voltage: 30 V AC, 60 V DC • Current: 16 A max £0.88 ea Colour EL130505 Red Insulated Panel Sockets 4 mm sockets, with solder connection which can be mounted in panels up to 13.5 mm thick. Mounting nut included. Supplied in packs of 10. •• Voltage: 125 V AC Current: 10 A max EL06611 Colour ✓ £3.25 pk EL06616 Colour ✓ £6.56 pk EL06612 ✓ £3.25 pk EL06617 ✓ £6.56 pk EL120550 Black EL110100 Black EL120555 Red £3.25 pk EL110215 Red £6.56 pk EL120560 Blue £3.25 pk EL110220 Green £6.56 pk EL120565 Green £3.25 pk EL110225 Blue ✓ £6.56 pk White ✓ £3.25 pk Yellow £6.56 pk Yellow White 254 More products and offers available on our website!

Bulb Holders ELECTRICITY & ELECTRONICS BC Bulb Holders ES Bulb Holders Cord Grip, Plastic, BC Fitting Lamp Holder, ES Fitting T2 temperature rating. 82 mm base diameter, 58 mm height. 60 W max recommended. EL06550 ✓ £1.55 ea £3.69 ea £5.25 ea Batten, Plastic, BC Fitting OP84690 Supplied without cord. SBC Bulb Holders Batten, Brass EL06555 SBC, with base with screw holes to mount onto MES Bulb Holders a surface. Lamp Base, MES (E10) £2.38 ea Miniature MES lamp holder, suitable for all MES lamps, terminated by solder tags at EL06562 the base of the holder. Dimensions: 10mm diameter 11mm high. Cord Grip, Brass Quantity SBC, to grip on to cable to suspend a bulb. EL160000 10 £1.01 pk Batten, Plastic EL06563 £6.57 ea EL06560 Quantity ✓ £3.74 pk SBC Bulb Holder 10 A brass SBC bulb holder mounted on a plastic base, with two 4 mm sockets for electrical connection. Includes a 12 V 24 W SBC bulb. Bulb Holders In Series & Parallel ABS box consisting of 4 MES bulb holders A wired in series or parallel, to show how voltage and current are affected by different circuit arrangements. Each box includes 4mm sockets for power input. Bulbs not included. B EL150202 Type £13.06 ea EL180564 £6.19 ea EL150204 £13.06 ea A Series B Parallel +44 (0) 3333 442 443 [email protected] timstar.com 255

ELECTRICITY & ELECTRONICS Bulbs BC Bulbs LED mains voltage lamps Daylight Bulbs Low energy mains light bulbs with instant on/off full brightness LED technology. Low power consumption, long lasting, cool running and no A range of 230V ‘daylight’ GLS mercury content, as found in the fluorescent type of low energy bulb. bulbs which simulate natural Non-dimmable. daylight, offering enhanced colour rendition and improved contrast for inspection, industrial lighting and other visually demanding applications. EL160800 Fitting Power ✓ £3.04 ea EL160805 £3.10 ea BC 60 W £3.65 ea BC 100 W £3.65 ea £3.65 ea Halogen Energy Saving GLS Bulbs Energy efficient replacements for Colour Fitting Power Equivalent incandescent GLS mains voltage Power bulbs. These use 30 % less energy, EL160530 Warm White BC £5.78 ea have twice the expected lifetime and EL160535 Warm White BC 5 W 30 W £7.24 ea are identical in size to the Tungsten 10 W 60 W ✓ filament (incandescent) equivalents which are no longer available. They Carbon Filament Lamp Replacements are also fully dimmable. Voltage: 230 V AC 240 V Rough Service lamp which adequately replaces the traditional Fitting Power Equivalent carbon filament lamp but has the added benefit of being more robust. Power Suitable for use in optics experiments such as pinhole cameras, EL130510 BC 28 W 40 W projection of an image, determining focal length of a lens etc. EL130515 BC 42 W 60 W EL130520 BC 70 W 100 W ✓ Mains Bulbs, Energy Saving Fitting Power OP110155 BC 40 W Spiral-type, 230/240V mains voltage low energy light bulbs. These are not suitable for dimming or electronic switches. Bulbs use 5 times less energy than traditional bulbs and are expected to last 8000 hours, based on 3 hours per day burn time. Colour: Warm white. Fitting Power Equivalent £14.31 ea Power EL120530 BC 20 W 100 W ✓ £5.36 ea All bulbs are non returnable EL120540 BC 30 W 150 W £6.43 ea COMMONLY USED LAMP (LIGHT BULB) FITTINGS Fittings Type SBC SBC BC LES MES SES ES Festoon Lilliput Edison Miniature Edison Small Edison Edison Screw Festoon Name Small Bayonet Small Bayonet Cap Bayonet Cap Cap Screw Screw Screw E27 - Other Name B15s B15d B22d 1* 1 each end No. contacts BA15s BA15d BA22d E5 E10 E14 on base 1 2 2 1* 1* 1* Dia. of Fitting 15mm 15mm 22mm 10mm 10mm 14mm 27mm Various Typical Car bulbs, Car bulbs, Mains light Panel lighting, ‘Pea’ bulbs - Torch Some mains Mains bulbs, Optics e.g. Applications 12V Optics e.g. 12V Optics e.g. bulbs, Infra red MFA boards bulbs, Worcester bulbs Spectral lamps, Ray boxes, Ray boxes, Ripple Ray boxes, Ripple circuit boards, BES Infra red lamps Whitley Bay Notes lamps kits, Locktronics smoke cell etc. tanks etc. tanks etc. *On Edison Screw bulbs, the screw thread forms the second contact. GLS on lamps refers to ‘General Lighting Service’ 256 More products and offers available on our website!

Bulbs ELECTRICITY & ELECTRONICS BC Bulbs continued LED Filament Mains Voltage Lamp LED Filament Mains Voltage Lamp LED filament bulbs use a string of fine LEDs to more closely mimic the operation of a LED filament bulbs use a string of fine classical incandescent filament bulb, while LEDs to more closely mimic the operation retaining the low power and cool operation of a classical incandescent filament bulb, advantage of LEDs. while retaining the low power and cool operation advantage of LEDs. OP180700 Colour Fitting Power Equivalent £7.59 ea Colour Fitting Power Equivalent £7.59 ea Warm BC 5W Power £2.93 ea OP180750 Warm ES Power White 30 W £3.74 ea £3.65 ea White 5 W 30 W £3.65 ea ES Bulbs £3.65 ea SBC Bulbs £4.47 ea Daylight Bulbs £4.61 ea Bulbs, SBC Cap, Radial Filament £5.36 ea A range of 230V ‘daylight’ GLS bulbs which £5.84 ea 12 V bulbs, with SBC fitting, and radial (horizontal) filaments. Can be simulate natural daylight, offering enhanced used in a ray box if the bulb holder is rotated such that the filament is colour rendition and improved contrast for parallel to the beams, effectively making it a point source. inspection, industrial lighting and other visually demanding applications. EL160810 Fitting Power ✓ EL160815 ES 60 W ES 100 W Halogen Energy Saving GLS Bulbs Energy efficient replacements for incandescent GLS mains voltage bulbs. These use 30 % less energy, have twice the expected lifetime and are identical in size Dimensions Power to the Tungsten filament (incandescent) EL06676 £1.70 ea equivalents which are no longer available. EL06678 35 x 19 mm (L x Dia.) 5W £3.09 ea They are also fully dimmable. Voltage: 230 EL06677 55 x 38 mm (L x Dia.) 36 W ✓ £2.76 ea V AC EL06679 55 x 38 mm (L x Dia.) 24 W £3.30 ea Fitting Power Equivalent EL160910 55 x 38 mm (L x Dia.) 48 W £1.39 ea 47 x 25 mm (L x Dia.) 21 W EL130525 ES (E27) Power 28 W 40 W EL130530 ES (E27) ✓ MES Bulbs 42 W 60 W EL130535 ES (E27) Bulbs, MES Cap 70 W 100 W Torch bulbs. Mains Bulbs, Energy Saving Spiral-type, 230/240V mains voltage low energy light bulbs. These are not suitable for dimming or electronic switches. Bulbs use 5 times less energy than traditional bulbs and are expected to last 8000 hours, based on Current Voltage Quantity 3 hours per day burn time. Colour: Warm EL06645 £7.49 pk EL06650 250 mA 1.25 V 10 £2.46 pk white. EL190800 200 mA 2.5 V 10 £9.94 pk Fitting Power Equivalent EL06646 90 mA 1.5 V 10 Power EL06655 300 mA 1.5 V 10 £2.46 pk EL120515 ES (E27) 11 W 60 W EL120505 300 mA 3.5 V 10 £2.38 pk EL120525 ES (E27) EL06662 300 mA 4.5 V 10 EL120535 ES (E27) 15 W 75 W EL180900 300 mA 6.5 V 10 £8.21 pk EL06663 EL120545 ES (E27) 20 W 100 W EL160920 0.1 A 12 V 10 £2.49 pk 200 mA 12.0 V 10 30 W 150 W ✓ 100 mA 12 V 1 £1.75 pk £2.63 pk £0.19 ea LED mains voltage lamps ✓ Low energy mains light bulbs with instant Bulbs, MES Cap, Lens Ended on/off full brightness LED technology. Low power consumption, long lasting, Lens ended bulbs, with MES bases, producing a focused beam of light. cool running and no mercury content, Commonly used in torches and applications where a directed beam as found in the fluorescent type of low is required. Dimensions: Diameter 9.5 mm (max.) x length 24 mm energy bulb. Non-dimmable. (overall). Colour Fitting Power Equivalent Warm ES 10 W Power EL160585 White 60 W £7.45 ea ✓ All bulbs are non returnable EL066645 Current Voltage Quantity ✓ £2.17 pk EL160850 £2.29 pk EL160852 250 mA 2.2 V 10 £2.61 pk 220 mA 1.2 V 10 300 mA 2.4 V 10 +44 (0) 3333 442 443 [email protected] timstar.com 257

ELECTRICITY & ELECTRONICS Bulbs LES Bulbs G6.35 Bulbs Bulb, LES Cap Projector Bulbs LES (Lilliput Edison Screw) cap bulbs. Uses Bulb for projector lamps (A1/ include lighting panels, MFA boards etc. 223). Current Voltage Quantity £7.99 pk Power Voltage EL120500 60 mA 6V 10 £1.61 ea AU50225 250 W 24 V £1.50 ea Festoon Bulbs £1.20 ea £7.60 ea £1.49 ea Festoon Bulbs Infrared Bulbs Diameter Power Voltage Bulbs, Infra Red 10 mm 10 W 12 V A tungsten filament bulb, internally silvered. 10 mm 3W 12 V EL06643 ✓ EL06644 ✓ G4 Bulbs Halogen Lamps, Low Voltage Fitting Power Voltage Low voltage halogen lamps, suitable for use LA09964 BC 250 W 240 V £13.06 ea in appropriate ray boxes. Distance between LA09965 ES (E27) 250 W 240 V £13.06 ea pins: 4mm. Power Voltage OP130505 10 W 12 V All bulbs are non returnable OP130510 20 W 12 V LED MAINS LIGHT BULBS – WATTS, LUMENS & COLOUR TEMPERATURE • LED bulbs consume far less energy than traditional incandescent (tungsten filament) or halogen bulbs and, unlike fluorescent and compact fluorescent bulbs and tubes, they do not contain any mercury. Also, they do not take time to warm up to full brightness but glow at full brightness almost as soon as they are switched on • Traditionally the brightness of light bulbs is rated by power (in Watts). However, since the introduction of LED mains lighting, the brightness of bulbs is starting to be rated in lumens - the higher the number of lumens, the brighter the light. This is because LED bulbs use so much less power and it is difficult to know how bright the bulbs are without stating an equivalent rating in Watts, for comparison with the old-type incandescent bulbs. The actual power rating should still also be stated (in Watts) • Please be aware that LED bulbs can only be used with dimmer switches if they are of the dimmable type, and dimmable LED bulbs require a trailing edge dimmer switch Equivalent brightness of different bulb types (approximate only) Tungsten filament (incandescent) 25W 30W 40W 60W 75W 100W Halogen 18W 21W 28W 42W 53W 70W Compact Fluorescent (CFL or low energy) 5W 6W 8W 12W 15W 20W LED 4W 5W 6W 10W 13W 18W Brightness (Lumens) ≥220 ≥300 ≥400 ≥700 ≥900 ≥1300 As a rough guide: halogen bulbs use approx. 30% less energy than incandescent bulbs; Compact fluorescent bulbs use approx. 80% less energy than incandescent bulbs; LED bulbs use approx. 85% less energy than incandescent bulbs. Colour Temperature Colour temperature is used to describe the type of white light emitted. Incandescent bulbs generally emit a ‘warm-white’ light, (yellow-white) and are suitable for less harsh (‘cosy’) house lighting etc. Halogen bulbs tend to emit a cooler white light. Fluorescent lights vary, being internally coated to emit different types of light e.g. warm-white, cool-white or light which is biased towards different parts of the light spectrum (e.g. blue or red, for plant growth etc.). LED bulbs use a colour temperature rating to indicate the type of white light emitted, which is stated in degrees Kelvin (K). LED Colour temperature 1800K 2700–3000K 3000K - 4000K 4000K 5000K – 6500K White light type Candlelight Warm White Cool White Cool White Daylight White Moonlight Daylight (bright to Equivalent light source Candle Incandescent lamp Halogen lamp overcast) Warmest Coldest 258 More products and offers available on our website!

Crocodile Clips ● Components ELECTRICITY & ELECTRONICS Crocodile Clips Crocodile Clips, Insulated Nickel plated steel.Takes a 4 mm plug. Nickel plated steel with a PVC shroud to prevent accidental short 10 A max current. circuits. Connection is via permanently attached wire of maximum 1 mm thickness. Sold in packs of 10. • Current rating 5 A max • Jaw opens up to 7 mm A B • 43 mm length EL06565 Quantity £1.24 pk Colour £0.61 pk EL06566 £12.91 pk EL18502 A Red £0.61 pk 10 EL18500 B Black 100 Components Bells Buzzers Electric Bell, Economy Buzzer Electric bell, comprising a plastic Single tone output, panel mounting, transistor oscillator DC buzzer. case with removable cover, and ••••• (70 mm) metal plated gong. Runs Voltage: 6 V cm off 4-6 V AC or DC, via flying Rated current: 25 mA 4 mm plug-leads. Frequency: 400±100 Hz Sound output: 70-75 dB @ 30 100 mm colour-coded leads EL06633 Diameter ✓ £8.53 ea EL06636 Voltage Quantity ✓ £6.86 pk 70 mm 6V 5 Electric Bell Buzzer, Miniature, Electronic A higher quality, more reliable bell manufactured in the EU. Operates Packs of 10 low cost miniature buzzers. These come complete with on 5-8 V. flying leads and are ideal for educational projects and general purpose use. •••• Current: 30 mA x 17 x 15 mm Dimensions (L x W x H): 23 Fixing Centres: 27.5 mm Lead Length: 80 mm EL101380 £20.56 ea EL130165 Range Voltage Quantity £11.19 pk EL130170 £11.19 pk EL130175 1.2-3 V 1.5 V 10 £11.19 pk EL130180 2-4 V 3V 10 £11.19 pk 4-8 V 6V 10 6-12 V 9V 10 Feet Capacitors Rubber Feet Capacitors, Ceramic Disc Self-adhesive square black rubber feet for attaching the bottom of A range of 4-7 mm diameter equipment. Sold in packs of 100. ceramic disc capacitors with 25 mm leads (contacts) and a • 12.7 mm side at wide point voltage rating of 50V. Sold in • 6 mm height packs of 10. EL180100 £8.90 pk EL130185 Capacitance £0.58 pk EL130190 £0.59 pk +44 (0) 3333 442 443 EL130195 220 pF £0.59 pk EL130200 470 pF £0.68 pk EL130205 10 nF £0.70 pk 47 nF 100 nF timstar.com 259 [email protected]

ELECTRICITY & ELECTRONICS Components Capacitors continued Battery Holders AA Size Capacitors, Radial Electrolytic Packs of 5. A range of radial electrolytic capacitors suitable for general purpose use. Supplied in packs of 10. EL130210 Capacitance Voltage £0.56 pk BA02030 Type £2.03 pk EL130215 £0.56 pk BA02031 £1.56 pk EL110650 1 µF 50 V £0.63 pk BA02032 1 x AA Cell with leads £1.84 pk EL110655 4.7 µF 50 V £0.55 pk BA42032 1 x AA Cell snap terminals £2.14 pk EL110660 10 µF 16 V £0.44 pk 2 x AA Cell snap terminals EL110665 22 µF 16 V £0.71 pk 2 x AA Cell with leads EL110670 47 µF 16 V £0.79 pk EL110675 100 µF 16 V £0.89 pk EL110680 220 µF 16 V £2.45 pk EL110685 470 µF 16 V £5.02 pk EL110690 1000 µF 16 V £6.45 pk 2200 µF 16 V £4.18 ea 4700 µF 16 V £6.86 ea Super Capacitors Battery Holders C Size These capacitors work like a rechargeable Packs of 5. battery. They charge in seconds and can be used to power lamps, motors etc. Clearly demonstrates the principles of rechargeable products. EL81435 Capacitance Voltage BA02040 Type £2.44 pk EL91422 BA02041 £4.29 pk 10 F 2.5 V 1 x C Cell solder tag terminals £3.04 pk 20 F 2.5 V 2 x C Cell snap terminals £4.71 pk £5.93 pk Capacitors, Radial Electrolytic Kit Battery Holders D Size A kit containing a total of 93 miniature Packs of 5. radial lead electrolytic capacitors. Each value individually packed. A total of 12 different values. Ranging from 1µF to 2220µF. Ideal as a starter kit. EL98012 £19.31 set Contact Cleaner BA02045 Type Contact Cleaner BA02046 BA02047 1 x D Cell solder tag terminals A highly effective, fast evaporating cleaning agent/ 2 x D Cell snap terminals degreasing solvent for cleaning audio video heads, 4 x D Cell solder tag terminals switch and relay contacts, potentiometers, printed circuit boards and delicate electronic components. Leaves no Battery Snaps residue, is harmless to plastics, paint, rubber etc. and leaves surfaces clean and dry. Supplied as a 200ml PP3 snaps with leads. Pack of 10. aerosol can, with applicator. EL120435 £9.83 ea Freeze Spray BA02049 £1.51 pk Freeze Spray Battery Holders Tapped Useful for quickly reducing the temperature of circuit Holds 4 x D (R20) batteries with outputs at 1.5, 3, 4.5 and 6V. Batteries components for fault finding or reducing the temperature and leads not supplied. Each output has a 4mm socket. of thermistors to alter the resistance. EL98075 £12.14 ea BA02060 £21.19 ea 260 More products and offers available on our website!

Components ELECTRICITY & ELECTRONICS DIL sockets Heat Shrinking DIL Sockets Heat Shrink Sleeving 8 pin DIL IC sockets, with dual wipe tin Heat shrink tubing in pre-cut lengths, with a shrink ratio of 2:1 when plated contacts. heated to 100°C or above. Highly flexible, flame-retardant and resistant to acids, alkali, fuel and oil. Ideal for placing over joined wires or components to hide and protect electrical joints and provide insulation. Best shrunk to size using a heat gun although a soldering iron tip can be used (less successfully). Dimensions are before shrinkage. Quantity £0.71 pk EL130220 10 Diodes Diodes, Signal, 1N4148 A general purpose low signal switching diode, this 1N4148 diode has an operating voltage of 75V and current rating of 150mA max. Quantity £0.60 pk EL130575 Colour Length Diameter £1.00 ea EL130225 10 EL130580 £1.13 ea EL130585 Black 1.2 metre 1.6 mm £1.13 ea Diode, Rectifier, 1N4001 EL130590 Black 1.2 metre 3.2 mm £1.36 ea EL130595 Black 1.2 metre 4.8 mm £1.00 ea DO-41 Plastic case, 1A silicon rectifier EL130650 Black 1.2 metre 9.5 mm £1.13 ea diodes. 1A/50V. EL130655 Red 1.2 metre 1.6 mm £1.13 ea EL130660 Red 1.2 metre 3.2 mm £1.36 ea Red 1.2 metre 4.8 mm Red 1.2 metre 9.5 mm EL98020 Quantity £0.54 pk Heat Shrink Sleeving Kit 10 A heatshrink sleeving kit housed in a plastic case with dividers and lid, and containing a variety of commonly used sizes and colours in pre-cut lengths. Lengths included: 50mm and 70mm. Nominal diameters of 3.2mm, 4.8mm, 9.5mm and 12.7mm. Colours: Black, Blue, Yellow, Red, White. LDRs Light Dependent Resistor (LDR), NORPS12 Photoconductive cadmium sulphide cell with a spectral response similar to the human eye. As light falling on the cell increases, so the resistance of the cell decreases. Peak spectral response: Typ. 550nm. Cell resistance: 9kâ—¦ at 10 lux. 400â—¦ at 1000 lux. Dark resistance: Min. 1Mâ—¦. Sold as a pack of 5. EL130665 £20.24 kit EL98016 £11.33 pk Heat Guns Miniature Low Cost LDR Heat Gun 2000 Watt 240 Volt Photoconductive cadmium sulphide light dependent resistor (LDR) This heat gun has two heat settings and offset nozzles for flexibility. The in a miniature epoxy sealed open frame package (4mm dia.). Cell setting can easily be changed during operation with one hand. Ideal resistance reduces as light falling on the device increases. Typical for paint stripping from furniture, de-icing of frozen metal water pipes, applications include light control, cameras, toys etc. Sold as a pack of soldering, melting wax, shrinking 10. heat-shrink tubing etc. Supplied with: • Peak spectral response: 540nm. 1 x Heat nozzle, 1 x Wide nozzle, 1 x • Light resistance: 50-100Kohm Reducer nozzle 22mm, 1 x Reflector • Dark resistance: 20Mohm minimum nozzle, 1 x Paint scraper, 1 x Transport • Max. voltage: 100V / Storage case. • Power max: 90mW • Working temp. range: -20 to +60° Specifications: • Voltage: 230 V AC • Power: 2 kW • Heat settings: 350 °C / 500 °C • Air Settings: 300 L/min. or 500 L/min EL150700 £3.25 pk TO150800 £31.19 ea +44 (0) 3333 442 443 [email protected] timstar.com 261

ELECTRICITY & ELECTRONICS Components LEDs LEDs, Bi-colour LEDs Two LEDs of different colours, connected in reverse parallel, in a 5 mm through-hole package with diffuse plastic. The LED can be used as a High quality 5 mm LED indicators with diffused lens. Maximum voltage simple indicator with an intermediate switch to change the polarity and 3.0 V DC. PCB or panel mount. Sold as a pack of 10. select the colour. More advanced applications include using pulse width modulation to quickly reverse the polarity to create a third colour (e.g. BD green + red = yellow). •• 60° viewing angle 2.5 Vf max. AC E EL180730 Colour £0.25 ea EL180732 £0.25 ea £0.84 pk EL180734 Red/Green £0.25 ea £1.19 pk Red/Yellow £1.24 pk Green/Yellow £4.53 pk EL06620 Colour Frequency Vf Max Vr Max £4.34 pk LED, RGB EL06621 A Red 480€THz 2.5 5 EL06622 (625€nm) High brightness RGB LEDs in a single 5 mm through-hole package. EL81364 B Green 531€THz 2.5 5 Each colour can be turned on and off independently. The four legs EL81362 (565€nm) are the +ve rails for the red, green and blue components, and a C Yellow 510€THz 2.5 5 common ground. Using switches, primary and secondary colours (588€nm) can be produced. For more advanced users, the brightness of each D White 45 colour can be controlled with PWM, using either a timing circuit, or a E Blue 638€THz 45 microcontroller such as an Arduino/Genuino or Raspberry Pi, allowing (470€nm) a full range of colours to be produced. Datasheet: timstar.co/EL170133 LEDs, Kingbright • Red 630 nm, 2.5 Vf max • Green 525 nm, 4 Vf max A range of super bright 5 mm LEDs from Kingbright, with transparent • Blue 465 nm, 4 Vf max lenses, low power consumption and high visibility. RoHS compliant. Sold • Uniform light output as a pack of 10. • 50° viewing angle • Water clear lens EL170133 £2.36 ea EL167300 Colour Frequency £3.81 pk LED, Flashing Rainbow Cycle EL167302 £1.19 pk EL167304 White 468 THz (640 nm) £6.06 pk 5mm LED indicators. Sold as a pack of 10. EL167306 Red 571 THz (525 nm) £2.82 pk EL167308 Green 638 THz (470 nm) £1.71 pk Blue 510 THz (588 nm) Yellow LED INFORMATION EL81366 Vf Max Vr Max £8.61 pk 6 5 When using Light Emitting Diodes it is strongly recommended that a resistor is LED, Infrared placed in series with the LED to limit the current and prevent heating up and damage. Suggested resistor values to use are A 5 mm through-hole infrared LED. Shows how LEDs can emit light shown below. These values are not critical but for guidance only. outside the visible spectrum. When illuminated, the LED cannot be seen by the naked eye, but can be detected by phototransistors, and can be Voltage in Resistor Circuit Symbol seen using a mobile phone camera or webcam. Supplied in packs of 5. circuit (V) value (Ohms) • 940 nm peak spectral wavelength • Water clear lens 3 150 • 20° viewing angle 5 270 • Forward voltage (VF) 1.2 V (1.6 V max) • Reverse current (iR) 10 µA max 9 470 12 560 Anode (+) Cathode (-) Cathode (-) Flat Side EL180120 £1.55 pk This is the shorter Anode (+) connector. There is also This is the longer connector LED, UV a flat side on the LED which corresponds to the These 5mm LEDs emit light in the UV frequency range. negative terminal. LED TERMINOLOGY IF max. Maximum forward current i.e. maximum recommended current passing through the LED when connected correctly VF typ. Typical forward voltage EL81368 Vf Max Vr Max £4.20 ea VF max. 4.2 5 Maximum recommended forward voltage VR max. Maximum recommended reverse voltage – not a problem if connected the right way round! 262 More products and offers available on our website!

Components ELECTRICITY & ELECTRONICS LEDs continued Motor, Miniature, DC LED Holder A range of miniature, circular DC motors, ideal for models and educational applications (the MM10 version has 2 flat sides). Shaft A black plastic holder into which the legs of Dimensions (L x Dia.): MM10: 8.1 x 2.0 mm. MM12: 8.1 x 2.0 mm. an LED can be pushed. The resulting contact MM18: 8.6 x 2.0 mm. MM28: 10.0 x 2.0 mm . For other specifications, provides connection via the wires. Sold as a see individual entries. RoHS compliant. Sold as a pack of 10. pack of 10. Dimensions for all motors are L x D EL81360 £7.69 pk AC LED Tester BD This handy and versatile LED tester is suitable for testing mono colour Type Range Dimensions RPM £5.45 pk LEDs as well as bi-colour and tri-colour LEDs of both anode-cathode- EL130255 A MM10 1.4-5.0 V £5.81 pk anode (ACA) and cathode-anode-cathode (CAC) types. Incorporates EL130260 B MM12 1.5-3.0 V 25 x 20 mm 16 000 £8.85 pk multiple testing holes for comparing colours, brightness etc. and a EL130265 C MM18 1.5-4.5 V 25 x 21 mm 14 700 ✓ £10.96 pk push button test switch with LED test indicator. Please note: Current EL130270 D MM28 1.5-6.0 V 27 x 24 mm 6 600 indications are for guidance only. Requires 9V PP3 type battery (not 30.5 x 24 mm 9 600 •included). Propellers Multiple testing holes for comparing colours, brightness, etc. Plastic propellers (impellers), designed to push onto 2mm diameter motor shafts. • Through-hole & Flux LED testing • Current testing at 2, 5, 10, 20 and 30mA • (mono colour LEDs) ACA and CAC testing for bi-colour & tri-colour LEDs at 20 mA, 50 mA, 70 mA, and 150 mA EL170737 £5.49 ea Loudspeakers EL110150 Type Diameter £1.11 ea EL110155 £1.11 ea Loudspeakers 4 blade 57 mm £1.41 pk 5 blade 60 mm £14.94 set A selection of larger sized, full frequency range loudspeakers for general purpose use. Motor Pulleys Small push fit pulley which fits directly onto a 2mm motor shaft. Sold as a pack of 5. AB Diameter Power Optimum Impedance Frequency A 126 mm 10 W Response EL130240 B 205 mm 40 W 70 Hz 8Ω £14.31 ea EL130250 -14.4 kHz £26.19 ea EL52100 35 Hz 8Ω -15 kHz Drive Belt Set Miniature A useful set of 4 flexible drive Loudspeaker belts, made from oil resistant black synthetic rubber, for replacing broken Suitable for use in portable ••••or stretched drive belts. equipment etc. These speakers 240 mm/38mm dia. have paper cones and ferrite 390 mm/62mm dia. magnets. Solder connection 580 mm/92mm dia. tags. Supplied individually 780 mm/124mm dia. boxed in packs of 5. Diameter Power Impedance EN170900 8Ω EL98025 50 mm 0.5 W £3.57 pk Motors Clips for Motors/Syringes Electric Motors Plastic self adhesive spring clips, ideal for mounting electric motors or syringes. With 2mm diameter shaft. Sold as a Accommodates items 19-25 mm in diameter. pack of 5. Sold as a pack of 10. EL06638 Length Diameter Voltage £3.41 pk EL06642 £3.08 pk EL06639 £6.00 pk 38 mm 20 mm 1.5-3 V 45 mm 24 mm 3-6 V +44 (0) 3333 442 443 [email protected] timstar.com 263

ELECTRICITY & ELECTRONICS Components Motors continued Operational Amplifiers 741 OP Amp Motor with Gear Box The UA741 is a high performance monolithic compensated operational A combined motor and clear gearbox unit, especially designed for amplifier IC, constructed on a single silicon chip. It is designed for use educational use. The motor operates between 1.5 and 6V DC and in a wide range of analogue applications. DIL 8 package format (i.e. 8 the unit includes interchangeable gears, giving a range of speeds and pins in two rows of 4). Sold as a pack 10. motor torques. The clear polycarbonate housing provides mounting for both the motor and gears, and full instructions for calculating gear ratios etc. are included. Shaft Dimensions (Dia. x L): 4 x 24mm (front), 54mm long (rear). RoHS compliant. Spare gear kits are also available separately. EL130275 £11.74 ea EL130155 £2.78 pk Motor Gearbox, Economy Potentiometers A slow speed axle drive gearbox designed for use with MM18 or Wirewound Potentiometers, 5W MM28 type motors. Provides increased torque and slows motor speed by approximately 42:1. Includes a 4mm dia. output shaft and motor High quality wire-wound controls, ideal for loudspeaker volume mounting screws. RoHS compliant. Motor not included. controls, miniature motor speed controllers, etc. Power rating: 5W; Resistance tolerance: ±20%; Spindle rotation: 300° ±5°; Max. operating voltage: 120V; Breakdown voltage: 200V. Body Dimensions (Dia. x D): 24 x 11mm. Spindle Dimensions (L x Dia.): 6.5 x 6mm. EL130285 £3.63 ea EL130560 Resistance £3.18 ea EL130565 50 Ω £3.18 ea EL130570 100 Ω £3.18 ea 200 Ω Motor Gearbox, Standard Potentiometer, Linear, 0.25W Ideal for projects, providing high power and low speed and designed A range of compact carbon track rotary controls. to fit our MM28 type motors. The Perspex base incorporates holes for The insulated all plastic body housing is semi-sealed screw fixing if required. The assembly also includes a precision worm against dust and moisture. Panel mounting with and gearwheel, and a 150mm long x 4mm dia. output shaft. RoHS threaded bush and fixing hardware. PCB terminals. compliant. Motor not included. Sold in packs of 5. • Spindle rotation: 300° • Maximum Voltage: 500 V • Rating at 40 °C: 0.25 W • Temperature range: -25 °C to +70 °C • Mounting bush: M10 x 0.75 • Body Dimensions (Dia. x D): 16 x 8 mm • Spindle Dimensions (L x Dia.): 38 x 6 mm EL130290 £2.95 ea EL98065 Resistance £4.76 pk EL98066 1 kΩ £4.76 pk 264 EL98067 10 kΩ £4.76 pk EL98068 100 kΩ £4.76 pk EL130901 1 MΩ £4.76 pk 470 Ω More products and offers available on our website!

Components ELECTRICITY & ELECTRONICS Potentiometers continued Prototyping Board Jumper Wire Pack Knobs For Potentiometers This Jumper Wire pack is suitable for use with all Prototype Boards (Breadboards) and provides a selection of ready cut leads ideally suited A range of soft-touch knobs which push-fit onto standard 6 mm for this purpose. The pack includes 10 pieces each of 14 different diameter splined shafts. Black body with integral coloured pointer lines. lengths, 2.5mm to 125mm (total 140pcs). Leads are PVC insulated, Suitable for a range of rotary potentiometers. Sold in packs of 10. colour coded in a variety of different colours, and pre-formed ready for use and come in a handy Perspex, partitioned case. RoHS compliant. EL130680 £7.01 set Flexible Jumper Wires Flexible jumper wires with crimped plastic pin housing, ideal for prototyping and solderless applications. Supplied in a pack of 10 •••a•ssLPH2oei6ronntueAgsdsiWtizhnceGog10l5owi.nu60isdrsummt.hlamm2te.d5 EL155100 Colour £3.78 pk mm EL155102 £3.78 pk wire EL155104 White £3.78 pk EL155106 Red £3.78 pk EL155108 Green £3.78 pk Blue Yellow Prototyping Boards Prototyping Board EL170600 Type £3.13 pk EL170602 £2.49 pk This Prototyping Board, also known as ‘Breadboard is ideal for making EL170604 Male-to-Male £2.49 pk up electronic circuits or test circuits without the need for soldering, as Male-to-Female wires and components can be simply pushed in or pulled out again. Female-to-Female This makes it ideal for designing circuits or when components need to be changed, and allows components to be used many times over. Strip Board Components and wires are held in place by clips below the holes, the clips being interconnected in groups to create connections between Strip Board components. Made from white high durability Acetal board mounted on an adhesive foam base, the contact positions are clearly indicated by Fully pierced stripboard used for prototype and development work. Can screen printed alphanumeric grids and colour coded polarity indicators. be readily cut to size. Provides a simple form of printed circuit. Copper The boards are also interlocking, enabling two or more boards to strips form the interconnections and can easily be cut where required. be fixed together. There are a total of 400 tie points (contacts). RoHS Made from copper-clad laminated board. All boards are punched on a compliant. 2.5 mm pitch. Sold in packs of 10. Dimensions £7.30 EL91552 Dimensions £3.31 pk EL130675 80 x 54 x 10 mm EL91554 £8.63 pk 25 x 64 mm +44 (0) 3333 442 443 64 x 95 mm timstar.com 265 [email protected]

ELECTRICITY & ELECTRONICS Components Resistors Resistors, Carbon Film Kit Resistors, Carbon Film A kit containing a total of 1000 0.25W 5% carbon film resistors. Values ranging from 4.7â—¦ through to 10Mâ—¦. A total of 63 different values, this 0.25 W Carbon film resistors, 5 % tolerance, maximum operating makes an ideal starter kit. voltage 300 V. Resistor Body Dimensions (L x W): 6.5 x 2.3 mm. Lead Dimensions (Dia.): 0.6 mm. Dimensions (L): 66.5 mm. Sold in packs of 100. EL98010 £23.06 kit RESISTOR COLOUR CODES EL130904 Resistance £1.34 pk OHM’S LAW: V=IR so R=V/I & I=V/R EL110695 1Ω £1.34 pk Total resistance EL130910 2.2 Ω £1.34 pk Resistors in series: EL110700 3.3 Ω £1.34 pk Rtotal = R1 + R2 + R3 EL130915 4.7 Ω £1.34 pk Resistors in parallel: EL130925 5.6 Ω £1.34 pk 1/Rtotal = 1/R1 + 1/R2 + 1/R3 EL130920 6.8 Ω £1.34 pk EL110705 8.2 Ω £1.34 pk EL110710 10 Ω £1.34 pk EL130930 22 Ω £1.34 pk EL110715 33 Ω £1.34 pk EL130935 47 Ω £1.34 pk EL130940 56 Ω £1.34 pk EL130945 68 Ω £1.34 pk EL110720 82 Ω £1.34 pk EL110725 100 Ω £1.34 pk EL110730 150 Ω £1.34 pk EL130950 220 Ω £1.34 pk EL110735 330 Ω £1.34 pk EL130955 470 Ω £1.34 pk EL130960 560 Ω £1.34 pk EL130965 680 Ω £1.34 pk EL110740 820 Ω £1.34 pk EL110745 1 kΩ £1.34 pk EL110750 1.2 kΩ £1.34 pk EL130970 2.2 kΩ £1.34 pk EL110755 3.3 kΩ £1.34 pk EL130975 4.7 kΩ £1.34 pk EL130985 5.6 kΩ £1.34 pk EL110760 8.2 kΩ £1.34 pk EL160150 10 kΩ £1.34 pk EL110765 15 kΩ £1.34 pk EL130990 22 kΩ £1.34 pk EL110770 33 kΩ £1.34 pk EL130995 47 kΩ £1.34 pk EL130750 56 kΩ £1.34 pk EL130755 68 kΩ £1.34 pk EL110775 82 kΩ £1.34 pk EL110780 100 kΩ £1.34 pk EL130760 220 kΩ £1.45 pk EL110785 330 kΩ £1.34 pk EL130765 470 kΩ £1.34 pk EL130770 560 kΩ £1.34 pk EL110790 680 kΩ £1.34 pk EL130795 1 MΩ £1.45 pk EL120410 5.6 MΩ £1.45 pk 10 MΩ 266 More products and offers available on our website!

Components ELECTRICITY & ELECTRONICS Resistors continued Metal Film Resistors, 2W, 5% Metal Film Resistors, 0.6W, 1% A range of 2 W, 5 % tolerance industry standard high power metal film resistors, coated with a red non-flammable lacquer which provides A range of 0.6 W, 1 % tolerance miniature metal film resistors in an electrical, climate and mechanical protection. Sold in packs of 10. axial leaded body. Low noise and voltage coefficient; Low temperature coefficient; Nichrome resistor element provides stable performance; • Power rating @ 70 °C: 2 W Multiple epoxy coating on vacuum deposited metal film provides • Tolerance: ±5 % superior moisture protection. In packs of 100. • Voltage rating: 550 V (DC or RMS) • Operating temperature: –55 °C to +155 °C • Power rating: 0.6 W • Dimensions: 12 mm length max., 3.9 mm diameter max. • Working voltage max.: 250 V • Overload voltage: 500 V • Tolerance: 1 % EL161200 Resistance £3.18 pk EL161201 Resistance £1.19 pk EL161202 10 Ω £3.18 pk EL161203 1Ω £1.19 pk EL161204 12 Ω £3.18 pk EL161205 2.2 Ω £1.19 pk EL161206 15 Ω £3.18 pk EL161207 3.3 Ω £1.19 pk EL161208 20 Ω £3.18 pk EL161209 4.7 Ω £1.19 pk EL161210 22 Ω £3.18 pk EL161211 10 Ω £1.19 pk EL161212 30 Ω £3.18 pk EL161213 15 Ω £1.19 pk EL161214 39 Ω £3.18 pk EL161215 22 Ω £1.19 pk EL161216 47 Ω £3.18 pk EL161217 33 Ω £1.19 pk EL161218 56 Ω £3.18 pk EL161219 47 Ω £1.19 pk EL161220 68 Ω £3.18 pk EL161221 68 Ω £1.19 pk EL161222 100 Ω £3.18 pk EL161223 100 Ω £1.19 pk EL161224 120 Ω £3.18 pk EL161225 330 Ω £1.19 pk EL161226 150 Ω £3.18 pk EL161227 470 Ω £1.19 pk EL161228 200 Ω £3.18 pk EL161229 1.0 kΩ £1.19 pk EL161230 220 Ω £3.18 pk EL161231 2.2 kΩ £1.19 pk EL161232 300 Ω £3.18 pk EL161233 3.3 kΩ £1.19 pk EL161234 330 Ω £3.18 pk EL161235 4.7 kΩ £1.19 pk EL161236 390 Ω £3.18 pk EL161237 6.8 kΩ £1.19 pk EL161238 470 Ω £3.18 pk EL161239 10 kΩ £1.19 pk EL161240 560 Ω £3.18 pk EL161241 15 kΩ £1.19 pk EL161242 680 Ω £3.18 pk EL161243 22 kΩ £1.19 pk EL161244 820 Ω £3.18 pk EL161247 33 kΩ £1.19 pk EL161246 1 kΩ £3.18 pk EL161249 68 kΩ £1.19 pk EL161248 2 kΩ £3.18 pk EL161251 100 kΩ £1.19 pk EL161250 2.2 kΩ £3.18 pk EL161253 220 kΩ £1.19 pk EL161252 3 kΩ £3.18 pk EL161255 330 kΩ £1.24 pk EL161254 3.3 kΩ £3.18 pk EL161257 470 kΩ £1.19 pk EL161256 4.7 kΩ £3.18 pk EL161259 680 kΩ £1.19 pk EL161258 5.6 kΩ £3.18 pk 1 MΩ EL161260 6.8 kΩ £3.73 pk EL161262 8.2 kΩ £3.18 pk Wire Wound Resistors, 6W, 5% EL161264 10 kΩ £3.18 pk EL161266 15 kΩ £3.18 pk A range of 6 W, 5 % tolerance wire-wound power resistors which EL161268 20 kΩ £3.18 pk have flame retardant coating, along with ceramic cores and metal EL161270 22 kΩ £3.18 pk alloy resistance wire, offering high resistance stability, excellent heat EL161272 30 kΩ £3.18 pk dissipation and low noise. Sold in packs of 10. EL161274 33 kΩ £3.18 pk EL161276 47 kΩ £3.18 pk • Power rating: 6 W EL161278 56 kΩ £3.18 pk • Resistance tolerance: ±5 % EL161280 68 kΩ £3.18 pk • Max. working voltage: 350 V EL161282 82 kΩ £3.18 pk • Temperature range: –55 °C to +155 °C EL161284 100 kΩ £3.18 pk • Dimensions: 24 x 8 mm EL161286 120 kΩ £3.18 pk EL161288 200 kΩ £3.18 pk EL162000 Resistance £3.05 pk EL161290 220 kΩ £3.18 pk EL162002 0.1 Ω £3.35 pk EL161292 300 kΩ £3.18 pk EL162004 0.22 Ω £2.30 pk EL161294 330 kΩ £3.18 pk EL162006 4.7 Ω £3.05 pk EL161296 470 kΩ £3.18 pk EL162008 5.6 Ω £3.05 pk EL161298 680 kΩ £3.18 pk EL162010 6.8 Ω £3.05 pk 1€MΩ EL162012 10 Ω £3.05 pk EL162014 15 Ω £3.05 pk EL162016 18 Ω £3.05 pk EL162018 22 Ω £3.05 pk EL162020 33 Ω £3.05 pk EL162022 47 Ω £3.05 pk EL162024 68 Ω £3.05 pk EL162026 100 Ω £3.05 pk EL162028 150 Ω £3.05 pk EL162030 180 Ω £3.05 pk EL162032 220 Ω £3.05 pk EL162034 330 Ω £3.05 pk EL162036 470 Ω £3.45 pk 680 Ω +44 (0) 3333 442 443 [email protected] timstar.com 267

ELECTRICITY & ELECTRONICS Components Switches B Tactile Switch Toggle Switch A push-to-make tactile switch ideal for prototyping and PCB mounting. Complete with on/off plate. It will straddle the centerline of most standard breadboards, similar to a DIP or IC. Four legs make the switch very stable. A • Height 4.3 mm • Dimensions 6 x 6 mm • Pitch 6.5 x 4.5 mm • Contact rating 500 mA 12 V DC • Contact resistance 30 mΩ max • Travel 0.25 mm EL170010 £0.19 ea Contact Switch Contact make-and-break switch (push to make) with sprung contact, mounted on an insulated base. EL06543 Type Dimensions Current Voltage £1.25 ea EL06544 A Single 25 x 14 x 14 1.5 A 25 V AC £1.56 ea pole, mm (L x W 25 V AC single x D) throw EL120660 £7.20 ea B Double 28 x 18 x 14 1.5 A pole, mm (L x W Switch, Mini Toggle double x D) throw A range of economical mini toggle switches, which are rugged and reliable. Complete with fittings for Miniature Tumbler Switch mounting. Rating: 1 A 250 V AC Contacts: Nickel plated brass. Panel cut-out: 7.0mm. With removable cover. Maximum 12V 3A. Surface mounting. Single pole, single throw. Type Dimensions Quantity EL06545 £2.36 ea EL130860 SPDT (on-on) 9.8 x 13 x 8 10 £8.61 pk EL130870 mm (H x W 1 £1.24 ea Push Button Switch x D) Miniature low cost push to make switch with SPDT (on-off-on) 9.8 x 13 x 8 red button. Sold in packs of 10. mm (H x W x D) Reed Switch, SPST/SPNO General purpose SPST magnetic reed switch, suitable for a wide range of applications. Contact form SPNO. Sold in packs of 5. EL98000 £4.26 pk Length DiameterCurrent Voltage Reed Switch Bar Magnet 28 mm 10.5 mm 250 mA 125 V AC For use with Reed Switches. Dimensions (L x W x D): 18 x 3 x 3mm. Sold in packs of 5. EL06542 £2.49 pk EL98002 £3.84 pk 268 More products and offers available on our website!

Components ● Soldering ELECTRICITY & ELECTRONICS Thermistors Precision NTC Thermistors NTC Disc Thermistors A range of high accuracy Negative Temperature Coefficient (NTC) thermistors (thermal sensing devices) suitable for general applications. A range of NTC (Negative Temperature Coefficient) miniature disc The rigid 12.5 mm leads are ideal for probe assembly and have a thermistors, for general purpose applications such as temperature tie-bar to aid PCB mounting. When used in temperature measurements, measurement and thermal compensation circuits. Also useful in the thermistor requires no adjustment between control circuit and the classroom for demonstrating how the resistance changes with sensor, which ensures a temperature precision of ±0.3 °C. Rated temperature. A thermistor is a temperature dependant resistor or power 10 mW at 25 °C. Suitable for temperature indicators and control ‘thermal resistor’. The thermistors are clearly coded. Sold in packs of instruments. Supplied in packs of 5. 10. • Highly accurate ±1 % resistance tolerances • Temperature range: -30 °C to +125 °C • Values from 1 k to 100 k • Tolerance: 10 % • Extremely Small B-value Tolerance • Rigid leads • Fast response • 15 s thermal time constant EL160703 Resistance £5.32 pk EL160732 Resistance £7.15 pk EL120415 100 Ω £4.07 pk EL160733 1 kΩ £7.15 pk EL160730 300 Ω £2.86 pk EL160734 2 kΩ £7.15 pk EL120420 100 kΩ £4.69 pk EL160735 5 kΩ £7.15 pk EL120425 5 kΩ £4.18 pk EL160736 10 kΩ £7.15 pk EL120430 1 kΩ £4.88 pk EL160738 20 kΩ £7.15 pk 20 kΩ 100 kΩ Transistors Transistors A range of more commonly used transistors, for various electronic circuits. Sold in packs of 10. EL130880 Type £5.45 pk EL130890 £0.59 pk EL130895 2N3053 medium power Silicon NPN planar transistor £0.49 pk EL130550 BC337-25 npn Silicon transistor £0.49 pk BC547B NPN epitaxial Silicon Transistor BC548B NPN epitaxial Silicon Transistor Soldering Soldering Irons Antex XS25 Soldering Iron Antex CS18 Soldering Iron General purpose soldering iron to BS3456 (2.14) featuring the same double shaft principle as CS-18. Very low current leakage (1 uA Miniature soldering iron to BS3456 (2.14) utilising double shaft maximum). 230V AC with PVC cable and fitted 13A mains plug to construction principle. Inner ceramic shaft with outer stainless steel shaft BS1363A. Supplied with 3mm bit. Operating tip temperature: 420ºC. gives near perfect insulation, and reduces current leakage less than 2 uA. Supplied with 2.3 mm bit. 230V AC with PVC cable and fitted 13A TO96510 £32.44 ea mains plug to BS1363A. Operating tip temp: 390°C. £5.34 ea SPARES & ACCESSORIES £5.34 ea Size Type ✓ £5.34 ea TO96528 1.0 mm Spare Tips TO96530 2.3 mm Spare Tips TO96532 3.0 mm Spare Tips Soldering Iron Designed for high speed temperature operation, with round pencil bit. TO96500 Type ✓ £32.44 ea TO16080 Power Voltage £23.06 ea £5.34 ea 25 W 220/240 V SPARES & ACCESSORIES Spare Tips Size Spare Tips ✓ £5.34 ea Spare Tips £5.34 ea TO96522 1.0 mm TO96524 2.3 mm TO96526 3.0 mm +44 (0) 3333 442 443 [email protected] timstar.com 269

ELECTRICITY & ELECTRONICS Soldering Soldering Iron Stands Solder Soldering Iron Stand Solder Made from high grade insulation material with Rosin cored, wire form. Dimensions (Dia.): chromium plated steel spring. 2.6€mm. Supplied in 100 g. TO16090 £11.34 ea TO16095 £14.94 ea ST4 Soldering Iron Stand Lead Free Solder, Tube Strong chromium plated steel spring with a A handy sized, more environmentally friendly lead-free alloy solder heat resistant plastic base. Integral sponge which contains a non-corrosive flux. Size: 1mm dia. x 2m long. for bit cleaning. Suitable for all Antex irons. Contains 99.3% tin and 0.7% copper. TO96515 ✓ £8.55 ea EL130670 £5.01 ea £5.30 ea Soldering Magnifier Desoldering Helping Hand Magnifier Desolder Tool A useful aid when soldering, gluing, etc. A high quality tool with double ‘O’ ring washers for increased suction. Teflon nozzle is removeable for cleaning or replacement. Lightweight and easy to use. Dimensions (L x Dia.): 200 x 20mm. TO96492 £5.94 ea Fume Extractors EL91558 Type Tool Fume Extractor Solder Tags This economical, mains powered solder fume extractor removes solder Solder Tags fumes with a high performance fan and replaceable activated carbon filter, which helps to significantly reduce headaches, eye irritation and M3 tin plated brass nausea. The unit has an adjustable angle for accurate placement. Spare solder tags. replacement filters are available (see below). • Power consumption: 23W • Voltage: 230V AC • Dimensions (W x H x D): 222 x 270 x 168mm Quantity ••• Weight: 1.4kg filter EL91550 100 £5.63 pk Activated Carbon long Mains lead: 1.5m EL101520 £33.69 ea Magnetic Parts Tray SPARES & ACCESSORIES £9.11 ea EL101522 Replacement activated Carbon filter Manufactured from oil resistant TPR material with a strong 50 mm diameter magnet. Ideal for storing nuts, bolts, screws, washers and Soldering Iron Cleaners sockets during disassembly/assembly. Attaches to any ferrous surface and even works upside-down. Ideal for keeping all parts secure when Soldering Iron Tip Cleaner repairing instruments such as microscopes or power supplies. Retracts flat for easy storage. Contents are made of low abrasive brass shavings which means no water or wet sponges necessary and little temperature drop compared with wet sponges. Anti-slip pad on the base with an integral adjustable soldering iron rest and two concave indents on the top rim. Dimensions (D x H): 82 x 30mm. EL101525 £11.24 ea TO180500 £9.94 ea 270 More products and offers available on our website!

Electrical Measurement ELECTRICITY & ELECTRONICS Analogue Electrical Meters Galvanometer, Moving Coil Milliammeters, Analogue For DC only with 4mm terminals. Moving coil DC milliammeters with zero adjust, fully enclosed in a robust housing, with clear acrylic front cover. • Scale length: 60 mm • Accuracy: ±2.5 % • Dimensions: 125 x 80 x 80 mm EL180770 Range £9.94 ea EL06830 Range ✓ £33.06 ea EL180772 £12.44 ea 35-0-35 mV 0-100 mA 0-500 mA Microammeters, Analogue Analogue Voltmeter, Premium Moving coil DC microammeter with zero This analogue voltmeter, specifically designed for use by students, is a adjust, fully enclosed in a robust housing, sturdy instrument for measurement of both AC and DC voltage. The with clear acrylic front cover. instrument comes with a DC/AC switch and has three voltage ranges. •••• Analogue meters can be more useful than digital meters for certain Range: 0-500 µA x 80 mm applications, and often provide a more visually stable reading. This Resolution: 10 µA instrument is electronically protected against overload but must not be Scale length: 60 mm connected to voltages exceeding 30 V. Dimensions: 125 x 80 • AC and DC ranges: 0-3 V; 0-15 V; 0-30 V • Precision: ± 2 % of full scale • Impedance: 10 kΩ/V • Electronically protected against overload • Dimensions: 158 x 108 x 56 mm • Scale length: 72 mm EL180800 £12.44 ea EL170400 £93.69 ea DC Analogue Benchmeters, Dual Scale Analogue Ammeter, Premium Economical analogue bench meters designed for education. Large, This analogue ammeter, specifically designed for use by students, easy-to-read scales. Connection via 4 mm terminal posts. is a sturdy instrument for measurement of both AC and DC current. •• The instrument comes with a DC/AC switch and has three current Accuracy: 2.5 % x 133 x 97 mm ranges. Analogue meters can be more useful than digital for certain Dimensions: 100 applications, and often provide a more visually stable reading. This instrument is electronically protected against overload and will tolerate EL180775 Range £12.63 ea overloads up to 15 A for at least 10 seconds. EL180815 £12.63 ea 0-3 V & 0-15 V • AC and DC ranges: 0-0.05 A; 0-0.5 A; 0-5 A 0-0.6 A & 0-3 A • Precision: ±2 % of full scale • Impedance: 10 kΩ/V • Max. voltage drop: DC: 0.25 V; AC: 0.27 V • Electronically protected against overload • Dimensions: 158 x 108 x 56 mm • Scale length: 72 mm EL170410 £116.19 ea Student Dual Amp and Voltmeter Galvanometer, Premium A strong, student proof meter housed in a high resistance plastic case, This galvanometer, specifically designed for use by students, is a sturdy incorporating a unique switching system which not only operates but sensitive instrument for the measurement of small currents. The internal shunting but automatically covers either amps or volts inputs instrument has a centre-zero scale and three current ranges and is when not in use and therefore eliminates student error. The moving coil electronically protected against overload, tolerating overloads of up to mechanism is adjustable for zero and provides negative reading on up to 1 A for at least 10 seconds. •both ranges. Input is via 4 mm screw terminals. • DC ranges: ± 5 mA; ± 500 μA; ±50 μA Large 80 x 80mm display reading -5 to 0, 0 to 50, -10 to 0, 0 to • Centre-zero scale 100. • Precision: ± 5 % of full scale • Internal resistance: ± 5 mA: ca. 9 â—¦; ± • DC amps:-100µA, 100mA, 1A and 5A • DC volts:- 100mV, 1V, 10V, and 50V 500 µA: ca. 90 â—¦; ± 50 µA: ca. 900 â—¦ • Dimensions (L x W x D): 160 x 110 x 55mm • Electronically protected against overload • Dimensions: 158 x 108 x 56 mm • Scale length: 72 mm EL06818 £31.19 ea EL170450 £121.19 ea +44 (0) 3333 442 443 [email protected] timstar.com 271

ELECTRICITY & ELECTRONICS Electrical Measurement Digital Electrical Meters Demonstration Electrical Meters Digital Meters, IPC Demonstration Meter A high quality range of ergonomically designed digital meters. 8 A universal demonstration meter which versions are offered covering most applications and ranges. The units can, by using interchangeable scales read come in moulded plastic cases and feature 25 mm LCD. Input is via both AC and DC volts and amps. The colour coded 4 mm sockets and the units are short circuit and overload movement is a quality, highly sensitive protected. Powered by a 9 V PP3 battery (not supplied). Dimensions (L x moving-coil meter housed in a tough W x D): 115 x 80 x 45 mm. plastic enclosure, suitable for educational use. The meter is large with clear scales A BC which can be read from either side of the meter. A complete range of interscales are DE FG available separately. £91.19 ea • Accuracy +/-2.5% • Basic sensitivity 5mA, 100mV f.s.d • Dimensions (L x W x H): 300 x 150 x 300mm EL52300 EL81410 Type Range £42.44 ea Interchangeable Scales EL81412 £42.44 ea EL81414 A Digital Voltmeter 0-2 V. DC £54.94 ea A range of scales designed for use with EL52300. Each scale comprises EL81402 B Digital Voltmeter 0-20 V. DC £42.44 ea a plastic panel displaying the scale with graduations on both sides EL81404 C Digital Voltmeter 0-20 V AC £42.44 ea and a moulded box at one end which contains the shunt or voltage EL81406 D Digital Ammeter 0-200 mA DC £42.44 ea multiplier appropriate to the scale. EL81408 E Digital Ammeter 0-2 A. DC £54.94 ea F Digital Ammeter 0-10 A DC G Digital Ammeter 0-10 A. AC £3.91 ea SPARES & ACCESSORIES BA01970 PP3 Batteries Range Digital Meters EL52310 2.5-0-2.5 mA DC £11.86 ea EL52312 10-0-10 mA DC £11.86 ea Economic, robust digital meters, EL52314 0-10 mA DC £11.86 ea housed in a sturdy ABS case with a EL52316 0-50 mA DC £11.86 ea clear LCD screen. Input is via 4 mm EL52318 0-100 mA DC £11.86 ea sockets on the front panel, which EL52320 0-500 mA DC £11.86 ea features an on/off switch. Each EL52322 0-1A DC £11.86 ea meters requires a 9 V, PP3 battery EL52324 0-5A DC £11.86 ea (NOT included). Dimensions (W x D x EL52326 0-1 V DC £11.86 ea H): 10 x 14 x 10 cm EL52327 0-5 V DC £11.86 ea EL52328 0-10 V DC £11.86 ea Type Range Quantity EL52329 0-15 V DC £11.86 ea EL52331 5-0-5 V DC £11.86 ea EL101480 Digital Ammeter 0-19.99 A DC 1 £23.69 ea EL52332 10-0-10 V DC £11.86 ea EL101482 £23.69 ea EL52333 0-100m V DC £11.86 ea Digital Voltmeter 0-19.99 V DC 1 EL52335 0-10 mA AC £11.86 ea £3.91 ea EL52337 0-100 mA AC £11.86 ea SPARES & ACCESSORIES EL52338 0-500 mA AC £11.86 ea BA01970 PP3 Batteries EL52339 0-1A AC £11.86 ea EL52343 0-10 V AC £11.86 ea EL52344 0-15 V AC £11.86 ea EL52345 0-50 V AC £11.86 ea Bench Meters, SATZ Current Direction Indicator Supplied in a strong high grade This current direction indicator has LEDs mounted with opposite ABS case with a large bold LCD polarities. If the unit is connected to a direct current source, then one and 4mm colour coded sockets. of the LEDs will light up and show the direction of the current. If the Powered by 1 x 9V PP3 Battery unit is connected to an alternating current source, both LEDs will light (supplied). Dimensions (L x W x up. If the unit is moved back and forth H): 95 x 90 x 75mm. the eye can detect that the LEDs light up alternately as the current switches EL18560 Type Range £34.38 ea back and forth. The current indicator is EL18562 £34.38 ea supplied with two 8 mm diameter red School Ammeter 0-10 x 0.01 A DC LEDs mounted in a cabinet with 4€mm School Voltmeter 0-20 x 0.01 V DC £3.91 ea safety connectors. Maximum voltage 30V. Provided with a 10€mm diameter mounting rod. Rod length: 93mm. Dimensions (W x L x H): 120 x 120 x 27mm. EL150600 £58.69 ea £33.69 ea SPARES & ACCESSORIES SPARES & ACCESSORIES BA01970 PP3 Batteries ST96274 Squat Retort Base 272 More products and offers available on our website!

Electrical Measurement ELECTRICITY & ELECTRONICS Multimeters UT33B Multimeter •P•••alTLDDmeCai-soDsttdaizlebeehaadtoedcldksdstilgiignithcaltlumdeudltimeter. Digital multimeter A neat and compact multimeter with mode select slide switch (DC Voltage/AC Voltage/Resistance) and range select dial. Comes complete with test leads and battery. ••••••••••• Pocket size 500 V ±0.8% Display: 14 x 35 mm ±1.0 % DC Voltage: 2 V ±0.5 %, 20 / 200 / AC Voltage: 200 / 500 V ± 1.2% DC Current: 200 mA ±1.5 % Resistance: 2 k / 20 k / 200 k / 2 M Continuity checking with buzzer Diode test Power: 12 V GP23A x 1 Size: 70 x 120 x 18mm Weight: Approx.110g (including battery) EL160300 £8.74 ea EL180410 £15.16 ea SPARES & ACCESSORIES £1.50 ea SPARES & ACCESSORIES £3.91 ea BA01987 23A (A23) Batteries BA01970 PP3 Batteries Student Digital Multimeter DM830D MY60 Digital Multimeter An easy to use compact 3.5 digit LCD multimeter. Supplied with test The MY60 is a high quality, high-accuracy 3.5 digit multimeter leads, battery and boot. Dimensions (L x W x D): 162 x 86 x 33mm. offering excellent value for money. This meter has thirty two ranges, which cover measurement of AC and DC voltage, AC and DC current ••••••FeaADRCDDteCoCiCuosnridvevastoeitosmna:lltTutnpsseicsts22eyt20020000mmm0AVVΩtttotooo171205kMA0VΩV, and resistance plus test positions for diodes and transistors. It also incorporates an audible continuity tester, large, clear LCD display and a ‘low battery’ indicator which shows when the battery is exhausted. The meter is supplied with a rubberised holster for protection, which has a 2-height stand built in along with clips to hold the test probes. Designed in accordance with IEC-1010. Supplied complete with holster, test probes, PP3 battery and instruction manual. Weight: 310 g (including battery). Dimensions (D x W x H): 31.5 x 91 x 189 mm. ••F••eaA3LDta2uCurtrgRoeveaospn:lLotgCawegDseer-: o23f0.f50mdi/g2it/s20/200V ±0.5%, • 1000V ±0.8% AC voltage: 200mV ±1.2%, • 2/20/200V ±0.8%, 700V ±1.2% DC current: 20µA ±2.0%, 200µA/2m/20mA ±0.8%, 200m/2A • ±1.5%, 10A ±2.0% AC current: 20µ/200m/2A ±1.8%, • 2m/20mA ±1.0%, 10A ±3.0% Resistance: 200/2k/20k/200k/2MΩ ±0.8%, 20MΩ ±1.0%, 200MΩ ±5.0% • Continuity checking with buzzer • Diode check: Test current 1.0mA, test voltage 2.8 ••• Power: PP3 (9V) x 1 LCD hFE: 1 ~ 1000 Display: 30mm x 60mm EL52400 ✓ £15.08 ea EL110250 £18.69 ea £3.91 ea £3.91 ea SPARES & ACCESSORIES £3.74 pk SPARES & ACCESSORIES £3.18 pk BA01970 PP3 Batteries BA01970 PP3 Batteries EL06687 EL18518 Fuses, Quick-Blow, Glass Fuses, Mains, Ceramic +44 (0) 3333 442 443 [email protected] timstar.com 273

ELECTRICITY & ELECTRONICS Electrical Measurement Digital Multimeter DM-921 Digital USB Multimeter ••••••••••• USB Connection to PC Auto ranging 2000 counts. Range hold with over range indication. Data AC & DC Voltage hold. Max hold. Auto power off. Temperature. Impact resistant rubber AC & DC Current and ABS plastic case with a flip-out desk stand. 34mm LCD with large Resistance digits. Auto polarity indication. Fast blow fuse for overload protection. Capacitance Low battery indication. Supplied with soft zip carry pouch, 2 test leads Diode test and battery and K Type temperature bead probe. Frequency/Duty Cycle Temperature Continuity Data hold Auto/manual range EL72555 £37.44 ea SPARES & ACCESSORIES £3.91 ea BA01970 PP3 Batteries Autoranging Multimeter with Auto-Fuse EL190605 ✓ £49.94 ea Autoranging Digital Multimeter with auto fuse - no more blown fuses to replace - it just beeps! This 3 3/4 digit multimeter has a self-resetting circuit breaker, automatic range selection and automatic shutdown. Now you no longer need to replace fuses when used incorrectly! Multimeter includes the following functions: Diode Test; Continuity Buzzer; Auto/manual Ranging; Data Hold; Relative Measurement; Back Light. Please note: to measure frequencies below 1.5€kHz, set the mode to VDC, and press the Hz/% button. Specifications: • Voltage range: AC 0 - 750V ± 0.8% • Voltage range: DC 0 - 1000V ± 0.8% • Current range: AC 0 - 10A ± 1.2% • Current range: DC 0 - 10A ± 1.5% • Resistance range: 0-40 Mâ—¦ ± 2.0% • Capacitance range: 0 to 200°F ± 3.0% • Frequency range: 0-10 MHz ± 2.0% • Operating voltage: 9V PP3 battery • (included) Dimensions (W x L x D): 78 x 185 x 38mm • Weight: 285g • Protective Rubber sleeve, test cables and manual included. EL130600 £43.69 ea SPARES & ACCESSORIES ✓ £7.44 pk EL190601 Fuse for High Current input BA01970 PP3 Batteries £3.91 ea 274 More products and offers available on our website!

Electrical Measurement ELECTRICITY & ELECTRONICS Joulemeters Joulemeter, Low Voltage, Premium Joulemeter, Low Voltage This meter is capable of measuring energies from 1 mJ to 9999 J or power from 1 mW to 200 W in AC or DC circuits. Two ranges selected This updated USB version of the low voltage Joulemeter includes by a switch labelled mJ/mW and J/W are available. The auto-ranging datalogging and an improved specification and can be used with or four digit display will give direct readings of energy or power. The without a computer. Designed to be simple enough to use at KS3, maximum current input is 10 A. All electrical connections are via 4 mm and flexible enough for more advanced use at KS4 and beyond, the sockets. Joulemeter simply requires an input supply and a load to be plugged in (e.g. a solar panel and a motor) and the meter will display the • Supply voltage: 20 V DC, 14 V AC (rms) values of the power and the energy transferred. For simplicity, the • Input resistance: (No load) 2Mâ—¦ instrument automatically adjusts the display to show suitable units and • Max load current: J/W range - 10 A, mJ/mW range - 10 mA an appropriate number of decimal places, so that it can deal with a • Max energies: J range - 9999 J, mJ range - 9999 mJ very wide range of values (e.g. for energy, from 100 nanojoules up • Max power: W range - 200 W to 1.75 megajoules). This version of the Joulemeter functions almost identically to the previous version but in addition the meter also keeps a log at the chosen sample rate when the total energy transferred is being measured; the data can then be loaded on to a PC using free mini- datalogger software. The function button allows any of four settings to be selected for the required quantity to be measured (energy and time; power; average power; voltage, current and power). • Current range: ±7 A (current can flow in either direction) • Voltage range: ±25 V • Log memory: 2500 samples • Log sample period: 1, 2, or 4 seconds • Powered via USB or using the 5 V mains adaptor (included) EL81448 £268.75 ea Mains Power & Energy Meter, Digital This plug-in power meter monitors and measures the energy/power consumption and running costs of connected electrical appliances. Measures voltage, current, power, frequency, power factor, usage and costs; adjustable price per kWh for 2 prices; memory for cumulative energy usage, total costs and costs by price setting; Large LCD; 12/24 hour clock with day/hour/minute; Clear function clears all data in memory including current time; supplied with batteries. Voltage: 200- 276 V AC; Current: 0.02-16 A; Power: 5-3588 W; Frequency: 45-65 Hz; Energy: 0-9999.9 kWh; Power Supply: 230-240 V AC 50 Hz; Max. load: 13 A, 3120 W; Power: 3 x 1.5 V button cell batteries (supplied). EL81445 ✓ £82.44 ea EN101550 ✓ £27.85 ea SPARES & ACCESSORIES £3.69 ea EL180447 Replacement fuse timstar.com 275 +44 (0) 3333 442 443 [email protected]

ELECTRICITY & ELECTRONICS Oscilloscopes Picoscopes Digital Oscilloscopes Dual Channel Picoscopes PC Oscilloscope, 60 MHz This range of PicoScopes are extremely versatile, with an Oscilloscope, A high bandwidth PC oscilloscope offering all the features of a standard spectrum analyser and arbitrary waveform generator in each model. oscilloscope but with the added benefits of compact size, portability and Their compact size makes them extremely portable and the cases are easy to use software (included). Minimum PC requirements: Pentium(R) very robust. Connections are simple, comprising, channel A, channel 4 2.4 GHz; 1 GB RAM; 1 GB minimum disk space OS: Windows XP/ B, signal out and USB socket. Dimensions (L x W x H): 100 x 135 x Vista/7/8 Ports: USB 2.0; USB 1.1 45mm. The USB (2.0) provides power, eliminating the need for an Display Resolution: 1024 x 768 external power supply. The USB connection facilitates high speed data transmission. The Windows software supplied with each PicoScope • USB isolation - less signal is very simple to use. It features an auto setup function which reduces inference, more PC protection setup time to a few minutes. Updates to the software are provided free of charge. Both models have input ranges of: ±50 mV, ±100 mV, • USB powered ±500 mV, ±1 V, ±2 V, ±5 V, ±10 V ±20 V. • Ultra-thin body design for easy Specification: Model: Picoscope 2204 storage & portability • Bandwith (MHz): 10 • ETS (GS/s): 5.0 Bandwidth 60 Hz • Sampling rate (MS/s): 100 Sample rate 500 MS/s • Scale (ns-s/div): 2-50 Model: Picoscope 2205 Record length • Bandwith (MHz): 20 Trigger options 10 M • ETS (GS/s): 10.0 edge, video, slope, pulse, and alternate • Sampling rate (MS/s): 200 EL170110 • Scale (ns-s/div): 1-50 Signal Generator Output: £293.75 ea • Buffer Size: 4k words • Vertical Resolution: 8 bits PC Oscilloscope • Output Range: ±125 mV to ±2 V pk-pk with ±1 V offset • Output Resistance: 600 O A PC based oscilloscope with all the features of a standard oscilloscope • Clock Frequency: 2 MHz plus the benefits of compact size and inclusive software which is • Bandwidth: DC to 1 MHz simple and intuitive to use. Minimum PC Requirements: Pentium (R) 4 2.4 GHz processor; 1GB memory; 1GB minimum disc space; Display Resolution: 1024 x 768; USB2.0 port Operating system: Windows XP, Windows Vista, Windows 7 To download the software, go to timstar. co/OS150000-software A B Bandwidth 25 MHz £156.19 ea Channel 2+1 (external) Type ✓ £243.75 ea Sample Rate EL81422 A PicoScope 2204 Horizontal Scale 100 MS/s EL81424 B PicoScope 2205 Rise Time 5 ns/div - 100 s/div Record Length Input Coupling max 14 ns Input Impedance 5k Max input voltage Channels Isolation AC DC GND DC Gain Accuracy 1 MO 2 %, in parallel with 10 pF-5 pF Vertical Resolution Vertical Sensitivity 400 Vpk-pk Trigger type 50 Hz 100:1, 100 MHz 40:1 Trigger mode Trigger level 3% Acquisition mode 8 bit Waveform Maths 5 mV/div - 5 V/div Lissajou figure bandwidth Edge, Pulse, Video, Slope, Alternate Lissajou figure phase difference Auto, Normal, Single Common interface 25 MHz Power Sample, Peak, Detect, & Average Dimensions +, -, x, /, FFT Weight full bandwidth OS150000 3° USB 2.0 5 V 1 A <1.5 W 170 x 120 x 18 mm 0.26 kg £156.25 ea 276 More products and offers available on our website!

Oscilloscopes ELECTRICITY & ELECTRONICS SDS1022 Oscilloscope Digital Storage Oscilloscope, 60mHz A digital storage oscilloscope, designed with simplicity in mind. The The Voltcraft DSO-1062D 2-Channel Oscilloscope is an entry-level vast array of advanced measuring options found in most digital model in the field of digital storage oscilloscopes. The device has oscilloscopes is mostly omitted, leaving only the essential features two channels with a bandwidth of 60MHz and a real-time sampling required in schools. This means the unit is very accessible for students rate of max. 1 GS/s and a memory depth of 512 kpts. Up to 1Mpts and teachers alike. are available if only one channel is used. The DSO-1062C is almost unbeatable value for money with its large 17.7cm 800 x 480 pixel • 7” colour screen (800 x 600) colour display and USB host for storing data on an optional stick. The • 20 MHz Bandwidth DSO-1062D is completed by a USB interface, multilingual Help menu, • Sample rate: 100 MS/s extensive trigger possibilities, automatic measuring functions including • Dual channel FFT and standard software included in the delivery. • Automatic measurement • Dimensions: 301 x 152 Specifications and Features: x 70 mm • 60MHz bandwidth • 1 GS/s real time sampling rate, equivalent to 25GS/s OS180100 £243.75 ea • Supplied with Voltcraft DSO-1062D, 2 probes (each 1:1 / 10:1), Colour Digital Oscilloscope Power cord USB cable, software, detailed instruction manual The SDS5032E is a general purpose 2 channel digital oscilloscope • (English), Quick Start Guide (Multilingual) with a large 200mm colour display, making it ideal for education and 2 probes (each 1:1/10:1), Power cable, USB cable, Software, industrial environments. Complete with USB output to PC. Detailed user manual (English), Quick instructions (Multilingual). Specifications and Features: • Accuracy: ±3% • Bandwidth: 60MHz • Bandwidth: 30MHz • Calibration possible to: ISO / DKD • Sample Rate (real time): 250MS/s • Channel type: 2 • Horizontal Scale (s/div) 4ns/div~100s/div, step by 1~2~4 • Dimensions: 313(W) x 142(H) x 108(D)mm • Rise Time (at input, typical) ≤11ns • Display type/resolution: 800 x 400 pix • Channels: 2 + 1 (external) • Displays: LCD • Display: 20cm (8”) colour LCD, TFT display, 800 x 600 pixels, • Input coupling: DC/AC/GND • Input impedance: 1MΩ 65535 colours • Input voltage range: 2mV to 100V (DC/ACpp) • Interfaces: 1x USB • Input Impedance: 1MΩ ± 2%, in parallel with 15pF±5pF • Mathematics functions: Pk-pk, max, min, effective value, cyc. RMS, • Channel Isolation: 50Hz: 100: 1, 10MHz: 40: 1 • Max Input Voltage: 400V (PK - PK) (DC+AC, PK - PK) Hz, period, rise/fall time, pos/neg half-wave • DC Gain Accuracy: ±3% • Record Length: 10K • Max. power consumption: 30W • DC Accuracy (average): Average≥16: ± (3% reading + 0.05 div) • Memory depth: 1 MPts (single), 512 kPts (dual) • Operation type: CH1, CH2, dual, XY for △V • Power supply: 100V AC to 240V AC • Resolution: 8-bit • Probe Attenuation Factor: 1X, 10X, 100X, 1000X • Sampling rate: 1GS/s (single mode), 500 MS/s (dual mode) • Sample Rate / Relay Time Accuracy: ±100ppm • Screen size: 17,7cm • Input Coupling: DC, AC, and GND • Timebase range: 4ns to 40s/div • Vertical Resolution (A/D): 8 bits resolution (2 Channels • Triggering: DC, AC, HF, LF, noise, EXT, EXT/5 • Type (manufacturer type): DSO-1062D simultaneously) • Vertical deflection: 2mV to 5V/div • Weight: 2kg • Vertical Sensitivity: 5mV/div~10V/div (at input) • Trigger Type: Edge, Pulse, Video, Slope • Trigger Mode: Auto, Normal, Single • Trigger Level: ±6 divisions from screen centre • Line / Field Frequency (video): NTSC, PAL, and SECAM standard • Waveform Math: +, -, x, ÷, FFT • Waveform Storage: 15 waveforms • Lissajous Figure Bandwidth: Full bandwidth • Lissajous Figure Phase Difference: ±3 degrees • Communication Interface: USB, USB flash disk storage, Pass / Fail, LAN, VGA (optional) • Power Supply 100V - 240V AC, 50/60Hz, CAT II • Power Consumption <18W • Fuse 2A, T class, 250V • Battery not supported • Dimension (WxHxD) 348 x 170 x 78 (mm) • Weight: 1.50 kg EL101460 ✓ £368.75 ea EL160650 £468.75 ea +44 (0) 3333 442 443 [email protected] timstar.com 277

ELECTRICITY & ELECTRONICS Oscilloscopes CROs Dual Trace Oscilloscope Oscilloscope, Single Channel This dual channel oscilloscope offers exceptional value in terms of price and performance. With frequency bandwidth of 10 or 20 MHz Our single channel value oscilloscope features an 8 x 10 division bandwidth and sensitivity ranges of; 1 mV/div - 1 V/div or 5 mV/div to screen, X-Y modes and built in probe calibration signals. Triggering 5 V/div. Display size: 150 mm diagonal flat screen. modes are Auto, Norm and TV and X1/X10 probes are included. Specifications and Features: Specifications and Features: • Single channel, 10 MHz • Dual channel, 20 MHz • Screen size 8 x 10, 1 div = 6 mm • High sensitivity • Vertical input 5 mV - 5 V/div • Full 80 x 100 mm rectangular screen with scale illumination • Horizontal 0.1 S/div - 0.1 uS/div • Excellent triggering facilities • Triggering mode Auto, Norm, TV • Ideally suited to education applications • Trigger source INT, LINE, EXT • A well presented front panel ensures quick and easy operation • Input voltage 110/220 V +/- 10 % AC • Variable hold-off function • Dimensions (W x L x H): 220 x 270 x 90mm • Convenient X-Y operation mode allows phase difference between • Weight 3 kg • measurements between two waveforms Carrying handle, which may be locked into any position, also • doubles as a tilt stand Supplied complete with mains lead and comprehensive instruction manual • Probes not included • Dimensions (L x W x H): 324 x 398 x 132mm • Weight: 7.5 kg EL101464 ✓ £212.44 ea EL81502 £618.75 ea Oscilloscope Accessories 3.5 mm to 4 mm plug leads BNC Connecting Leads & Adapter A 3.5€mm headphone plug connected to 2x€4€mm plugs, for taking audio output from an MP3 player, phone etc. Approximately 65€cm Leads come ready assembled with moulded-on strain reliefs. long. EL160100 £8.74 ea Microphone A microphone unit for use with an oscilloscope to demonstrate voice waveform. Crystal microphone mounted in a moulded plastic box with 4mm connection. Impedance 1Mâ—¦. Dimensions (L x W x H): 55 x 110 x 22mm. EL18512 Type £4.94 ea SO86270 ✓ £48.69 ea EL18513 £7.44 ea EL18514 BNC Plug to BNC Plug £10.31 ea EL18516 BNC Plug to Crocodile Clips £6.56 ea BNC Plug to Stackable 4mm Plugs BNC Plug to 4mm sockets 278 More products and offers available on our website!

Capacitance & Charging ● Resistance ELECTRICITY & ELECTRONICS Capacitance Selector Capacitor Investigation Demo Board Twelve non-electrolytic capacitors selected This is a highly useful demo board, it makes the student to understand by a rotary switch mounted on the outer the charging and discharging of the capacitors. Here the external + casing. Capacitance values available: 12V DC supply is used for charging the capacitors through the current 100pF; 220pF; 470pF; 2.2nF; 4.7nF; limiting resistors. The charging curve/time can be viewed on CRO. 10nF; 22nF; 47nF; 220nF; 1µF. Connection Once the capacitor is fully charged, it can be discharged with the help by 4mm sockets. of toggle switch (turning towards discharge). Again the discharge curve/time can be viewed on CRO. This phenomenon can also be demonstrated using current meter, only the polarity of motor should be connected properly. Here three different combinations of C & R are provided for observing different wave forms. EL110300 £54.94 ea EL71405 £67.44 ea Resistance Mounted Resistance Coils Resistance Selector This useful apparatus nicely demonstrates how electrical resistance varies with the length of wire, diameter of wire and type of wire. The Mini substitution unit using a single wires are wound on bobbins, for convenience, and the resistances can rotary switch to select from twelve be compared by simply connecting a suitable multimeter or ohm meter values all at 5% 0.5W. Values in â—¦ across the terminals for each coil, in turn. Lengths and diameters of are 100, 330, 470, 680, 1k, 3.3k, wires are in two to one ratios to simplify calculations. The apparatus 4.7k, 6.8k, 10k, 33k, 47k and 100k. comprises a set of five coils wound on identical bobbins and mounted Connections via 4mm sockets. on a base, with six 4mm sockets for electrical connections. Various coils are: • No. 1: Copper wire, 32SWG x 10m • No. 2: Copper wire, 38SWG x 10m • No. 3: Copper wire, 32SWG x 20m • No. 4: Copper wire, 38SWG x 20m • No. 5: Nichrome wire, 38SWG x 10m EL71455 £42.44 ea EL130700 £37.44 ea Decade Resistance Box USEFUL ELECTRICAL FORMULAUEseful Electrical Formulae A four decade resistance box covering 1 to 9999â—¦ in 1â—¦ steps. Plastic enclosure box with resistance values 5% tolerance. Dimensions (L x W x H): 165 x 80 x 50mm. EL71415 £62.44 ea Resistance Substitution Box A 6 decade resistance substitution box ideally suited for school or college use. The box will simulate resistances from 1 to 999,999â—¦ in 1â—¦ steps. The value selected is clearly indicated on the dials. OHM’S LAW: V=IR so R=V/I & I=V/R Total resistance Resistors in series: Rtotal = R1 + R2 + R3 Resistors in parallel: 1/Rtotal = 1/R1 + 1/R2 + 1/R3 EL71460 £56.19 ea +44 (0) 3333 442 443 [email protected] timstar.com 279

ELECTRICITY & ELECTRONICS Resistance Rheostats Sliding Contact Potentiometer A range of rheostats or potentiometers ideal for school use. Consisting Slide wire pattern mounted on a rigid anodized aluminium base fitted of heavily oxidised resistance wire wound upon a vitreous enamelled with a metric scale with two equal lengths of constantan wire running steel tube and locked into place with ceramic cement, multi-leaf across their length. Connection to the resistance wires is made via 4 phosphor bronze heavy duty sliding contact on a nickel plated rod. mm sockets. Resistance wires located along the meter rules, giving a Robust enamelled die-cast end stands and 4mm socket terminals. All total length of 2 metres. Complete with knife jockey. Resistance of wire Rheostats are 43 mm diameter. approx 2 O/m. EL18540 Length Current Resistance ✓ £38.69 ea EL18541 1600 Ω £38.69 ea EL18542 200 mm 0.3 A 600 Ω £26.81 ea EL52260 £49.94 ea EL18543 200 mm 0.6 A 300 Ω £38.69 ea £7.88 ea EL18544 200 mm 0.9 A 135 Ω £42.44 ea SPARES & ACCESSORIES EL18545 200 mm 1.4 A 55 Ω £42.44 ea EL52265 EL18546 200 mm 2.3 A 16 Ω £38.69 ea Spare Jockey EL18552 200 mm 4A 8.5 Ω £36.81 ea EL18553 200 mm 5A 125 Ω £41.19 ea EL18554 300 mm 1.8 A 37 Ω £54.94 ea EL18555 300 mm 3.2 A 20 Ω £38.69 ea 300 mm 4.5 A 4.5 Ω 300 mm 9A ...an essential OUR EXPERT SAYS... Wheatstone Bridge product to Slide wire pattern with four gaps for known and unknown resistors. help students A straight resistance wire stretched along a metric scale mounted on a wooden base. Wire can be easily replaced if damaged or broken. understand electrical resistance in a Complete with jockey. All connections are low resistance and via standard 4 mm sockets. Length: 1.5 m. metal caused by electrons colliding with atoms. A rheostat (variable resistor) controls the current in a circuit, and so can vary the brightness of a bulb or the speed of a motor. Resistance Wire Board This apparatus provides the basis for student investigations into resistance. Four wires, 500mm long mounted on an acrylic base and connected via 4mm sockets. The wires are all Nichrome with diameters of 1.0, 0.8, 0.63 and 0.4mm giving resistances in the range 0.4 to 4 ohms. A graduated mm scale is included allowing resistance V length and resistance V diameter investigations to be easily covered. Dimensions (L): 500mm. EL52250 £49.94 ea £7.88 ea EL71445 £118.69 ea SPARES & ACCESSORIES EL52265 280 Spare Jockey More products and offers available on our website!

Resistance ELECTRICITY & ELECTRONICS Wheatstone Bridge Teledeltos Conductive Paper Comprises a length of resistance wire stretched over a wooden metre High resistance conductive paper. Suitable for: (e.g.) Electric field rule with millimetre graduations. Five brass strips with terminals make plotting. Simple strip resistors (or variable resistors using 2 mounted four gaps, across which resistances and a voltage source can be strips with conductive surfaces in contact, overlaying by varying connected, or the gaps can be closed if required by means of additional amounts). Resistance: 2,000-3,000 ohms/square. brass strips. A jockey is supplied which allows readings to be taken at specific points along the resistance wire. A spring clip is supplied for convenient storage of the jockey. The whole unit is mounted on a polished wooden board. The resistance wire can be replaced easily with a length of 26, 28, or 30 swg constantan wire. EL91430 Dimensions £9.94 ea 457 mm x 1 metre (W x L) Resistance Putty Conducting putty is a useful aid to teaching resistivity and the relationship between length and cross-sectional area on resistance. A cylinder 60mm long and 20mm in diameter has a resistance of approximately 20â—¦. Can readily be connected into an electrical circuit and both length and diameter can easily be altered by ‘re-moulding’ the putty. Although harmless, plastic gloves are provided to prevent hands from becoming stained. Approx. 100g. EL91440 £19.94 ea EL190250 ✓ £74.94 ea Thermistor £7.88 ea This apparatus contains an NTC bead thermistor with a nominal resistance of 4.7kâ—¦ in a glass tube with electrical connection made by means of 4mm sockets. Students from KS3 to Post-16 can carry out practical investigations into the thermistor characteristics. Full instructions and specimen results included. Dimensions (L): 220mm. SPARES & ACCESSORIES EL52265 Spare Jockey Constantan Wire, Bare (Eureka) EL71480 £39.94 ea Supplied on a reel (60% Copper, 40% Nickel Alloy). Temperature Coefficient of Resistance Apparatus These immersible resistors are used to determine the resistance temperature coefficient for various materials. They consist of resistance wire (diameter 0.25 mm) wound on Plexiglas cores with safety jack connectors. The resistance wire is immersed in a non-conductive liquid (e.g. demineralised water, kerosene or mineral oil). By measuring the resistance as a function of temperature the temperature coefficients of the materials can be found. Size 180 mm x 20 mm diameter. The specified resistance values are for 20 °C. swg Diameter Length Resistance Weight £23.69 ea EL110302 Type Resistance £66.19 ea EL06721 26 per kg £23.69 ea EL110303 1.8 Ω £66.19 ea EL06722 28 0.45 mm 708 m 3.10 Ω/m 125 g £23.69 ea EL110304 Copper 46.7 Ω £66.19 ea EL06723 30 0.37 mm 1020 m 4.40 Ω/m 125 g Constantan 8.7 Ω 0.31 mm 1444 m 6.30 Ω/m 125 g Nickel +44 (0) 3333 442 443 [email protected] timstar.com 281

ELECTRICITY & ELECTRONICS Transformers Demountable Transformers Demountable Transformer Coils Demountable Transformer Kit To fit the EL180820 demountable transformer kit. Fits a 40 x 40 mm core. A laminated, low loss core on which to attach coils in different combinations to demonstrate the principle of step-up and step- down transformers. Various coils can be used for GCSE physics and A-Level physics to show how transformers are used in domestic electrical appliances and in the National Grid for power transmission. Demonstrations work well with the Interscale Demonstration Meter EL52300. The core is made up of highly permeable U-shaped metal sheeting, which can be closed via two clamps with tightening screws. The cross-section of the core measures 40 x 40 mm. Contents: • Transformer core • 1x 6000 turn, 0.2 A coil, with tappings every 2000 turns • 1x 1200 turn, 1.25 A coil, with tappings at 300 & 600 turns • 1x 72 turn, 12 A coil, with tappings at 6, 30, 54, and 66 turns • 1x 600 turn, 2.5 A coil, with mains input, switch and protective fuse The Premium Version is supplied in a Gratnells tray with insert. EL180820 Type £268.75 ea EL81452 Type £34.94 ea EL180830 £300.00 ea EL81454 Coil 50 turns, 4A, 0.15Ω £36.19 ea EL190821 Standard Version ✓ £112.44 ea EL81456 Coil 100 turns, 2A, 0.55 Ω £36.81 ea EL190823 Premium Version ✓ £16.19 ea EL81458 Coil 200 turns, 1A, 2.5 Ω £33.06 ea Dissectible Core EL81460 Coil 500 turns, 0.5A, 8.95 Ω (In Starter Kit) £41.19 ea Clamps £2.49 pk EL81462 Coil 1000 turns, 0.3A, 39.5 Ω £44.94 ea £6.91 ea EL81464 Coil 2000 turns, 0.05A, 445 Ω £66.19 ea Mains Coil 1000 turns, 230V, 1A, 13.5 Ω (In Starter Kit) £2.49 pk £6.91 ea SPARES & ACCESSORIES SPARES & ACCESSORIES EL18524 Fuses, Slow-Blow (Time-Delay) EL18524 Fuses, Slow-Blow (Time-Delay) EL18517 IEC Mains Leads (Kettle Lead) EL18517 IEC Mains Leads (Kettle Lead) Transformer Accessory Kit 1 Transformer Accessory Kit 2 Used to demonstrate that step down transformers can produce currents Lenz’s law transformer accessory kit to demonstrate the production of that are large enough to weld metals or boil water. large magnetic fields and Lenz’s law damping on pendulums with and without slits. EL81466 £91.19 kit EL81468 £88.69 kit 282 More products and offers available on our website!

Transformers ELECTRICITY & ELECTRONICS Demountable Transformers continued U-Core With Armature Transformer Coil Set, Student Laminated U-core with armature and clamp screw. Cross sectional area: 20 x 20mm. Coils to fit EL150800 and EL150806. Made of coloured plastic with 4mm safety jack connectors. Armatures available separately. The coils are provided with a transparent, adhesive polyester foil with effective voltage insulation up to 4500 V to reduce the risk of electric shock. ••••••• Hole size: 20.5 x 20.5 mm 680 µH Colour: Blue Number of Windings: 200 Max. current: 2 A Resistance: 0.7 O Thread diameter: 0.9 mm Inductance: Approximately EL150800 £56.19 ea E-Core With Armature Laminated E-core with armature. Suitable for the construction of a three-phase transformer. Cross-sectional area: 20 x 20€mm. EL150810 Type Colour £24.31 ea EL150806 £103.69 ea EL150812 £24.31 ea EL150814 200 turns Blue £26.81 ea EL150816 400 turns Yellow £26.81 ea EL150818 600 turns Grey £26.81 ea EL150820 800 turns Grey £33.06 ea EL150822 1600 turns Red £30.56 ea EL150824 3200 turns Grey £33.06 ea 200/400 turns Grey 300/600 turns Grey Cardboard Square For Coil Armature, Laminated This cardboard square has cut-outs for coils EL150810-EL150824. Laminated I-core. Dimensions (W x H x L): 20 x 20 x 83mm. Mass: Used for demonstrating the magnetic field around a coil using iron 225g. filings. MA150416 £0.94 ea EL150802 £19.94 ea Galvanometer Insert Armature, Massive For building a simple galvanometer. The insert consists of a permanent This massive I-core is used for demonstrating the increase in power magnet with a pointer. The device is fitted with a 0-centre scale. loss when using massive cores instead of laminated types. When the Compatible with coils EN140105-EN140120 massive core is used it becomes warmer than the laminated core. Dimensions: 20 x 20 x 83 mm EL180810 £33.69 ea EL150804 £16.19 ea +44 (0) 3333 442 443 [email protected] timstar.com 283

ELECTRICITY & ELECTRONICS Transformers ● Rectifiers C-Core & Coils National Grid Simulation Kit C-Core Coils Set To safely demonstrate the need for high voltage transmission of electricity. This apparatus clearly demonstrates how this is achieved A range of sturdy, mounted coils, designed for use with laminated C using the 2 interconnected boxes through which pupils can see the cores and clips. The coils have different numbers of turns of copper components. The high and low voltage sides are clearly indicated, with wire, allowing students to investigate the relationship between voltage resistance wires connected to either side for direct comparison of lamp and number of turns, showing how transformers work etc. They can brightness/energy loss. By gripping the insulated cables the energy also be used to demonstrate electromagnetic induction (Faraday’s law). loss can be felt in the form of heat. There are also voltmeter sockets for Coils come complete with 4mm sockets and are available individually measuring the high voltage. Comes complete with two boxes (transmit or as a set of 5 coils: 50 + 100 turns; 200 + 300 turns; 300 + 350 and receive), insulated resistance wires, two mounted SBC lamps and turns; 400 + 500 turns; 550 + 600 turns. •full instructions. Touchproof, locking high voltage connectors used throughout - it • is virtually impossible to get an electric shock Clear lid to the casing so pupils can see how it works and trace the circuit • Indicators for low/high voltage • Voltmeter sockets for measuring the high voltage • Supplied with 2 x kits to make up the pylons EL71435 ✓ £143.75 kit £26.19 ea SPARES & ACCESSORIES £2.76 ea EL180437 HT Leads for Mk 2 kit EL06677 Bulbs, SBC Cap, Axial Filament ...by gripping OUR EXPERT SAYS... insulated cables, Type energy loss can EL71510 Coil 50 + 100 Turns £47.44 ea be felt in the form of heat. A great EL71512 Coil 200 + 250 £62.44 ea EL71518 Coil 550 + 600 £68.69 ea way to safely demonstrate high EL71520 Set of 5 Coils £243.75 set £28.69 pr voltage transmission of electricity. SPARES & ACCESSORIES Quantity £4.86 ea The kits clever design ensure it is Type £27.44 ea 2 virtually impossible to receive an EL130315 C Core each EL130320 C Core Clip 2 (+ 1 clip) electric shock. EL130325 C Core & Clip Rectifiers Bridge Rectifier Full Wave Bridge With LEDs This convenient and useful apparatus transforms alternating current Comprising a plate with four arrow-shaped red LEDs in a diode-bridge (AC) into direct current (DC) using diodes in a specific arrangement. arrangement, with a 4 mm socket at each node. By using a slow AC The Bridge Rectifier consists of four diodes connected in a bridge circuit, power supply (using a signal generator at <1 Hz) each step in the which allows AC current to be input into the circuit and, by full wave rectification process can be followed. rectification, DC current will be output. The unit has a circuit diagram printed on the top so that students may gain an understanding of the • Max 15 mA/25 V AC importance of diodes and how they can rectify alternating current to • Plate size: 90 x 90mm direct current. Weight: 0.2kg. Dimensions (L x W x H): 150 x 100 x 100mm. EL120705 £16.19 ea EL150740 £28.06 ea 284 More products and offers available on our website!

Mains Accessories ELECTRICITY & ELECTRONICS Adaptors Insulation Tape Mains Adapter Insulating PVC Tape Fused. 19 mm width. In rolls of 20 m. EL06630 Colour Width ✓ £1.24 ea EL06631 £1.23 ea EL06508 Type £6.89 ea EL110160 Black 19 mm £1.24 ea 3-Way EL110165 White 19 mm £1.24 ea EL110170 Red 19 mm £1.24 ea EL110175 Green 19 mm £1.24 ea Blue 19 mm Yellow 19 mm Extension Leads IEC Mains Leads (Kettle Lead) Extension Lead Moulded UK mains plug to IEC plug. White 4-gang socket with a 13 A fused fitted plug of 3-core cable. EL06515 Type Current £9.91 ea EL18517 Type Length Current £6.91 ea 4 Gang 13 A EL170519 £5.85 ea C13 plug 1.8 m 5A C5 plug 1.5 m 2.5 A Surge Protector Extension Lead Insulated Wire A 4 gang extension with 2 m lead. Ideal for use with PCs and other Cable, PVC Insulated 3-Core Cable sophisticated electronic equipment. This extension lead will protect your equipment from the surges experienced via the national grid or as a 10 m lengths. For mains use to BS 6500. result of power cuts and the subsequent reinstatement of power. EL81350 Type £17.44 ea EL06751 Current £6.85 ea 4-Gang (fused) EL06752 ✓ £8.25 ea EL06753 3A 6A £11.60 ea 10 A Extension Reel Terminal Blocks Three-core insulated mains cable and a double socket outlet and safety Terminal Blocks cut-out. Neat holder collects and realigns flex. (Length 6 M) Set of 12 connectors mounted in plastic body. Which can easily be sub- divided by cutting. EL06520 Type Length Current £11.65 ea EL130685 Current £0.76 ea 2 Gang 6M 5A EL06530 £0.64 ea EL06535 3A £1.01 ea 5A 15 A timstar.com 285 +44 (0) 3333 442 443 [email protected]

ELECTRICITY & ELECTRONICS Fuses Quick Blow Fuses Slow Blow Fuses Fuses, Quick-Blow, Glass Fuses, Slow-Blow (Time-Delay) 20 x 5 mm, 250 V AC. Supplied in packs of 10. 20 x 5 mm. 250 V AC. Supplied in packs of 10. EL06686 Length Current £3.74 pk EL18520 Length Current £2.49 pk EL06687 £3.74 pk EL18521 £2.49 pk EL06688 20 x 5 mm 100 mA £3.74 pk EL18522 20 x 5 mm 100 mA £2.49 pk EL06689 20 x 5 mm 250 mA £2.01 pk EL18523 20 x 5 mm 250 mA £2.49 pk EL06691 20 x 5 mm 500 mA £2.01 pk EL18524 20 x 5 mm 500 mA £2.49 pk EL06692 20 x 5 mm 1A £2.04 pk EL18525 20 x 5 mm 1A £2.49 pk 20 x 5 mm 2A 20 x 5 mm 2A 20 x 5 mm 5A 20 x 5 mm 3.15 A Siba Quick Blow Glass Fuses Siba Slow Blow Glass Fuses A range of Siba 20 x 5mm glass quick blow fuses, designed to IEC127. A range of Siba 20 x 5mm glass slow blow fuses, designed to IEC127. Supplied in a pack of 10. Supplied in packs of 10. • Glass tube with nickel plated brass endcaps • Glass tube with nickel plated brass endcaps • Breaking capacity 35 A/250 V AC • Breaking capacity 35 A/250 V AC • 20 x 5 mm (L x dia.) • 20 x 5 mm (L x dia.) Current EL160400 Current £2.09 pk EL160401 200 mA £2.81 pk EL160402 £2.21 pk EL160403 315 mA £2.81 pk EL160404 200 mA £1.59 pk EL160405 800 mA £2.81 pk EL160406 315 mA £1.49 pk EL160407 1.6 A £2.81 pk EL160408 800 mA £1.69 pk EL160409 2.5 A £2.81 pk EL160410 1.25 A £1.46 pk EL160411 10 A £2.81 pk EL160412 1.6 A £1.49 pk EL160414 2.5 A £1.59 pk Fuse Wire 3.15 A 10 A Fuse Wire, Mixed Pack Fuses, Mains, Ceramic This pack contains 3 lengths of fuse wire and is ideal for demonstrating 6.3 x 25.4 mm. 240 V AC. To BS 1362. Supplied in packs of 10. the relationship between thickness and resistance in fuse wires. The thinner wire EL18518 Current £3.18 pk can also be used to demonstrate how a fuse £4.09 ea EL06680 £3.18 pk works (requires a power supply capable of EL06681 2A £3.18 pk delivering a current over 5 Amps). Contents: EL06683 3A £3.23 pk 1.7m of 5 amp fuse wire (for use in lighting 5A circuits, max circuit loading 1kW); 0.7m of 13 A 15 amp fuse wire (for use in mains socket ring circuits, max circuit loading 3kW): 0.5m of 30 amp fuse wire (for use in cooker, shower and immersion heater circuits, max circuit loading 7kW). EL120570 Timeguard Fast Blow Ceramic Fuses Fuse Wire, 3A A range of miniature 20 x 5 mm fast blow ceramic fuses. Supplied in a Silver wire which fuses at 3 A. Ideal for use with the fuse wire holder. Supplied as a reel of 50 m. •p•••••acRC2RN1kaa25eictto0.rie5kanfdemmg1Ala0AipBctt.orlta2ebo1t5aoe16k0dd0iynAVbgmA:rAa:1caCsa10tsep50rea00inac0AidltAycaps EL170573 £29.94 ea EL160450 Current £2.41 pk £26.81 ea EL160452 £2.19 pk Fuse Wire Holder EL160454 250 mA £2.19 pk EL160456 1A £2.19 pk Handy holder for clamping EL160458 2A £2.19 pk fuse wire, to demonstrate EL160460 2.5 A £2.19 pk the operation of a fuse in an EL160462 5A £2.19 pk electrical circuit. The holder EL160464 8A £2.19 pk includes 4 mm sockets, for easy 10 A connection to lab leads, and is 16 A designed for use with bare fuse wire, which should be pushed into the fuse holder’s clamps. EL170575 286 More products and offers available on our website!

Wire ELECTRICITY & ELECTRONICS Core Wires Copper Wire, Bare Copper Track Supplied on a reel. Supplied on a reel with self adhesive backing. EL06758 Length Width £8.74 ea 33 metre 5 mm £8.04 ea £8.04 ea Brass Wire, Bare £8.04 ea swg Length Resistance Weight per kg 0.000544 Ω/m EL06700 14 35 m 0.0085 Ω/m 250 g ✓ £14.94 ea EL06702 16 56 m 0.0269 Ω/m 250 g £15.56 ea EL101440 swg Diameter Weight ✓ EL06703 20 176 m 0.0432 Ω/m 250 g £15.56 ea EL101441 EL06704 22 284 m 0.0694 Ω/m 250 g £16.19 ea EL101442 30 0.31 mm 50 g EL06706 24 456 m 0.108 Ω/m 250 g £16.19 ea 25 0.5 mm 50 g EL06707 26 708 m 0.155 Ω/m 250 g £16.81 ea 22 0.71 mm 50 g EL06708 28 1020 m 0.0139 Ω/m 250 g £17.44 ea EL18530 18 90 m 0.219 Ω/m 250 g £14.94 ea Constantan Wire, Bare (Eureka) EL18531 30 1444 m 0.278 Ω/m 250 g £17.44 ea EL18532 32 1828 m 0.544 Ω/m 250 g £18.06 ea Supplied on a reel (60% Copper, 40% Nickel Alloy). EL18533 36 3584 m 250 g £19.31 ea Copper Wire, Enamelled Supplied on a reel. swg Length Resistance Weight swg Length Resistance Weight EL06716 16 per kg 0.244 Ω/m per kg 0.0139 Ω/m EL06717 20 56 m 0.77 Ω/m 125 g £22.44 ea EL52110 18 90 m 0.0269 Ω/m 125 g ✓ £7.57 ea EL06718 22 176 m 1.24 Ω/m 125 g £23.06 ea EL52112 20 176 m 0.0432 Ω/m 125 g £7.63 ea EL06719 24 284 m 1.99 Ω/m 125 g ✓ £23.06 ea EL52114 22 284 m 0.0694 Ω/m 125 g £7.77 ea EL06724 32 456 m 7.90 Ω/m 125 g £23.06 ea EL52116 24 456 m 0.108 Ω/m 125 g £7.89 ea EL06726 34 1828 m 11.20 Ω/m 125 g £24.31 ea EL52118 26 707 m 0.155 Ω/m 125 g £8.06 ea EL06727 36 2574 m 15.0 Ω/m 125 g £24.31 ea EL52120 28 1018 m 0.219 Ω/m 125 g £8.24 ea EL06728 38 3584 m 27.0 Ω/m 125 g £24.94 ea EL52122 30 1442 m 0.278 Ω/m 125 g £8.38 ea EL18534 18 6372 m 0.399 Ω/m 125 g £25.56 ea EL52124 32 1825 m 0.544 Ω/m 125 g £8.54 ea 90 m 125 g £20.56 ea EL52128 36 3580 m 125 g £9.09 ea STANDARD WIRE GAUGES (SWG) AND DIAMETERS* OF BARE WIRES SWG Diameter SWG Diameter SWG Diameter 4 5.89mm 20 0.91mm 36 0.19mm 5 5.39mm 21 0.81mm 37 0.17mm 6 4.88mm 22 0.71mm 38 0.15mm 7 4.47mm 23 0.61mm 39 0.13mm 8 4.06mm 24 0.56mm 40 0.12mm 9 3.66mm 25 0.51mm 41 0.11mm 10 3.52mm 26 0.46mm 42 0.10mm 11 2.95mm 27 0.42mm 43 0.09mm 12 2.64mm 28 0.38mm 44 0.08mm 13 2.34mm 29 0.35mm 45 0.07mm 14 2.03mm 30 0.31mm 46 0.06mm 15 1.83mm 31 0.29mm 47 0.05mm 16 1.63mm 32 0.27mm 48 0.04mm 17 1.42mm 33 0.25mm 49 0.03mm 18 1.22mm 34 0.23mm 50 0.025mm 19 1.02mm 35 0.21mm * Diameters are approximate only. +44 (0) 3333 442 443 [email protected] timstar.com 287

ELECTRICITY & ELECTRONICS Wire Copper Wire, Tinned Flexible wire, 1.2 mm Supplied on a reel. This high quality stranded PVC-insulated equipment wire is ideal for general interconnection within apparatus. It is suitable for use with crocodile clips EL18500 & EL18502. • 7 strand/0.2 mm tinned copper conductor • Overall diameter 1.2 mm • Current rating 2 A EL06710 swg Diameter Weight £3.69 ea • Rating 1 kV rms 1.4 A at 70°C A B 26 0.45 mm 50 g • PVC insulation • Supplied on reels of 100 m Iron Wire, Bare Please note, this wire rusts very readily and will probably have some surface rust when purchased. swg Diameter Weight Colour £11.19 ea EL180400 A Black £11.19 ea 25 EL180402 B Red EL101445 22 0.5 mm 50 g £8.04 ea EL101446 22 0.71 mm 50 g ✓ £6.35 ea Cable, PVC Insulated 3-Core Cable EL101447 0.71 mm 1000 g £16.19 ea 10 m lengths. For mains use to BS 6500. Manganin Wire, Bare EL30200 swg Diameter Weight £11.50 ea EL06751 Current £6.85 ea EL30202 £11.50 ea EL06752 ✓ £8.25 ea EL30204 20 0.9 mm 50 g £14.31 ea EL06753 3A EL30206 22 0.71 mm 50 g £14.31 ea 6A £11.60 ea EL30208 24 0.56 mm 50 g £22.44 ea 10 A EL30210 26 0.45 mm 50 g £22.44 ea 28 0.37 mm 50 g ✓ Cable, PVC Insulated 2-Core 30 0.31 mm 50 g 10€m length, 2€A rating. To BS 6500 (bell wire). Nichrome Wire, Bare Supplied on a reel (80% Nickel, 20% Chromium Alloy). EL06755 £3.13 ea swg Length per kg Resistance Weight EL06731 18 96 m 0.88 Ω/m 125 g £26.19 ea Wire, Single Core EL06732 20 125 g £26.81 ea EL06733 22 188 m 1.70 Ω/m 125 g £26.81 ea Single core equipment wire consisting of 0.60 mm diameter solid EL06736 26 £27.44 ea Copper core with outer PVC sheathing, EL06737 28 304 m 2.70 Ω/m 125 g ✓ £27.44 ea giving an overall diameter of 1.20 mm. EL06738 30 £28.06 ea Supplied as a 100 m reel. 1.8 A rating. EL06739 32 756 m 6.80 Ω/m 125 g £28.06 ea EL06740 34 125 g £28.06 ea EL06741 36 1088 m 9.80 Ω/m 125 g £28.06 ea EL150100 42 125 g EL161000 42 1542 m 13.90 Ω/m 125 g £2.01 ea EL06734 24 2.72 g £16.81 ea 1952 m 17.50 Ω/m 50 g £26.81 ea 125 g 2758 m 24.70 Ω/m 3826 m 34.40 Ω/m 15032 m 137.50 Ω/m 15032 m 137.50 Ω/m Colour Current 488 m 4.40 Ω/m EL110180 Black 1.8 A ✓ £10.83 ea EL110185 Red 1.8 A ✓ £10.83 ea Wire, Extra Flexible EL110190 Blue 1.8 A EL110195 Brown 1.8 A £10.83 ea Extra flexible stranded copper wire. EL110200 Green 1.8 A £10.83 ea Supplied in a 25 m reel. EL110205 Orange 1.8 A £10.83 ea ••• EL110210 Yellow 1.8 A £10.83 ea PVC insulated ✓ £10.83 ea Diameter: 2.8 mm Max current: 6 A Cable Ties EL067460 Colour ✓ £7.05 ea EL91400 Colour Length Quantity £0.54 pk EL067461 £6.94 ea EL91402 £1.74 pk EL067462 Black £7.05 ea Black 102 mm 100 EL067463 Blue £7.05 ea natural 200 mm 100 EL067464 Green £6.94 ea EL067465 Red £7.05 ea White Yellow 288 More products and offers available on our website!

289 ENVIRONMENTAL SCIENCE Field Studies 290 Surveying298 Horticulture294 Water Testing 298 Soil Testing 296 Weather & Environmental Measurement 299

ENVIRONMENTAL SCIENCE Field Studies Choice Chambers Calcium chloride anhydrous - granular LR Timstar Choice Chamber CA1856 Chemical Quantity £4.86 500 g At last, the once ubiquitous Choice Chamber is readily available again, at an affordable price! Robustly made from injection moulded Acrylic, Copper Based Humidity Papers this is a modification of the ‘classic’ design. With four compartments for holding desiccating and humidifying components (e.g. silica gel A safer alternative to cobalt chloride test papers. or anhydrous calcium chloride and water or cotton wool soaked in water) a piece of fine mesh is placed over the compartments and the TP15000 Quantity £4.49 pk lid placed on top to hold the mesh in place. This mesh layer ensures 10 books the organisms cannot come into contact with the desiccant etc. below. The clear lid of the chamber has slightly raised ridges which divide Silica gel self-indicating it into quarters, to facilitate the placement of tracing paper or card segments, creating different levels of opacity or for light to be blocked Red to yellow (anhydrous to hydrated). An alternative indicator, safer out completely. This allows a range of condition gradients within the than cobalt(II) chloride. chamber to be created. The edges of the lid can also be blacked out if required, to augment the dark conditions. The organisms being SI5336 Chemical Quantity £14.31 tested (e.g. woodlice or maggots) are then introduced via the single 500 g 18 mm diameter hole in the lid. The lid fits onto the base in such a way that the top segment guides align with the compartment walls Woodlice below, which means the different light level sectors of the lid will match the compartments in the base precisely. Available in a range of base Packs of living woodlice, suitable for behavioural experiments e.g. for colours with clear lids, the choice chambers come without the mesh use with choice chambers. material, which is available separately. Dimensions (Diameter x D): 200 x 35 mm. BL160700 Quantity £11.24 pk BL160702 £37.44 pk BL160704 10 £69.94 pk 50 100 Colour Quantity ✓ £47.44 pk EN120975 Clear 5 ...the Timstar OUR EXPERT SAYS... Choice Chamber is a modification of the classic design. The lid fits onto the base in such a way that the top segment guides align with the compartment walls easily and precisely. Mesh SPECIMENS Mesh material for use with the choice chambers. 1 square metre - When ordering LIVE SPECIMENS sufficient cover 12-16 chambers. please allow 7-10 days for delivery, as all our specimens are freshly prepared. All live specimens EN120905 £5.63 ea are non-returnable. A4 Card £12.44 pk A4 deep black card, pack of 100 sheets. Weight 160gsm. Colour ST120105 Black 290 More products and offers available on our website!

Field Studies ENVIRONMENTAL SCIENCE Nets Specimen Bottles Insect Nets Specimen Bottles, Plastic A strong fine net for catching all types of flying insects. Dimensions (Diameter x L): 250 x 560 mm. Handle dimensions: 630 mm. Clear plastic containers with screw-on lids. Ideal for use outdoors or in the classroom. In packs of 30. EN06971 £16.19 ea Dipping Nets BO03090 Capacity ✓ £9.94 pk BO170300 £18.69 pk Flymesh netting on a strong U.P.V.C. handle. Dimensions: 190 x BO03091 30 mL £23.06 pk 150mm. Handle dimensions: 300mm. 60 mL 70 mL Pond Trays Pond Trays White plastic trays useful for pond dipping and viewing pond life. Available in 2 sizes. EN06974 Quantity £24.94 pk 5 Mini Pond/Tank Nets Type Dimensions A pack of mini nets suitable for use in fish tanks, small ponds and for Small 350 x 250 x 50 mm (L x W x H) pond-dipping activities. Nets are robust, with close weave mesh netting. Large 400 x 310 x 90 mm (L x W x H) Dimensions: 330 mm handles and 150 x 120 mm nets. EN52680 £3.15 ea EN52682 £4.49 ea Pooters Perry’s Pooters All plastic construction. Strong clear 70ml container with airtight lid and two clear flexible tubes. A safe filter prevents specimens reaching the sucking tube. Quantity £7.29 pk EN169000 5 Water Nets Junior pond net with micromesh netting on a strong U.P.V.C. handle. Dimensions: 200 x 150mm. Handle dimensions: 900mm. EN06976 £5.70 ea EN07036 Quantity £17.44 pk 5 timstar.com 291 +44 (0) 3333 442 443 [email protected]

ENVIRONMENTAL SCIENCE Field Studies Quadrats Tulgren Funnels Folding Quadrat Tulgren Funnel For population counts and other A soil sample is placed on the perforated plate and a 230V heating measurements in the field. lamp is held above the soil driving the organisms down through the Consists of 4 white plastic coated funnel into a collecting jar. Supplied with coarse and fine mesh and 3 steel rods 0.5m long with markers core cable. (Retort stand rod and base not supplied). at 0.25m which simply bolt together to form a quadrat frame. £13.69 ea Folds flat when not in use. EN07056 Quadrat 25 Squares Solid square metal frame with 25 squares in total. Dimensions: 500 x 500mm. EN71655 ✓ £21.81 ea Quadrat 100 Squares Superior quality plastic coated steel 100 squares. Dimensions: 500 x 500mm. EN91594 £24.31 ea Respiration Chambers EN81550 £101.19 ea SPARES & ACCESSORIES £3.65 ea Respiration Chamber EL130510 Halogen Energy Saving GLS Bulbs The simplest and cheapest way to observe CO2 release! Ideal for Retort Stands, Rods & Bases individual student use. These respiration chambers can be part-filled with lime water or bicarbonate indicator solution, the organism or See page 371 (Stands), 371 (Rods) and material to be tested placed in the top chamber and the carbon dioxide 371 (Bases) given off or expired can be observed by a change in the solution. Observation is easy due to the transparency of the box. The apparatus consists of an external chamber with an internal sample holder which is perforated to allow the exchange of gases. This holder prevents contact between the sample and solution below. Dimensions (Diameter x H): 35 x 75mm. Quantity £18.06 pk EN110115 6 More products and offers available on our website! 292

Field Studies ENVIRONMENTAL SCIENCE Viewers Bug Pots Large Magnifying Set The transparent pots have magnifying lids and useful grids on the bases. Magnification approx. x2.5. The Large Magnifying Set is ideal for inspecting specimens from nature trips. The millimetre grid on the base of the pot means that the actual size of the specimen is easily recorded. The stands (supplied) also make an excellent free-standing desk-top magnifier. (Lens magnification: x 2.3). Complete with product guide. Content is not included. Dimensions: 100 x 110mm. EN130865 £14.94 set EN81520 Quantity £11.24 pk 10 Nature Viewer Two Way Viewer Ideal for examining small insects, pond life etc. Comprises a 70 mm Ideal field study viewer. Specimens can be viewed from above and from diameter removable lens with x3.5 magnification, mounted on a 60 the side. Dimensions: 190 x 130mm. mm deep box with a removable metric grid base. With the base of one pot removed, two pots can be stacked to double the magnification. Please note the pots are not intended to hold water. To observe pond life, a Petri dish or similar is recommended. EN07070 £4.50 ea EN07072 £9.95 ea Giant Bug Viewer Bug Tongs A large, ventilated viewing pot with 5x magnification lid which allows Invicta’s Bug Tongs are ideal for field trips for pupils to collect students to observe insects and other small creatures etc. in detail. The specimens. Children can capture insects, bugs and other small pot opens at both ends, for easy access, and has a clear base with organisms from within their natural habitat or environment for micro ruler. Includes a plastic mantis. Height 135mm. examination without touching or hurting the specimen. The scissor action bug tongs are fun, easy and safe to use for both capture and release of flying, swimming or crawling insects. Once captured the children can transfer the insect into a larger bug pot for further detailed examination prior to release. The Bug Tongs come complete with a product guide. Dimensions (L): 215€mm. EN160800 £8.92 ea Quantity £12.44 pk EN130840 5 +44 (0) 3333 442 443 timstar.com 293 [email protected]

ENVIRONMENTAL SCIENCE Horticulture Garden Tools Garden Accessories Dutch Hoe Gardening Gloves Pressed steel triangular head with alloy handle. Head Dimensions: Cotton and chrome leather palm. One size to fit all. 130mm. Handle Dimensions: 1.3 metres. HO09025 £14.94 ea Rake Type £2.44 pr HO09140 Gents Pressed steel head containing twelve teeth with 1.3m alloy handle. Dimensions (12 teeth): 280 x 85mm. Alloy handle dimensions: 1.3 Electric Seed Propagator metre. Clear plastic, with heated base tray. Comes complete with adjustable ventilation and 2 x 220mm seed trays. Dimensions (L x W x H): 380 x 240 x 190mm. HO09030 £16.19 ea Trowel HO09160 £43.69 ea Pressed steel blade on 130mm handle. Seed Trays, Small HO09065 Approximately half size seed trays, heavy duty with drainage holes. Dimensions (L x W x H): 225 x 165 x 55mm. Weed Fork £4.69 ea Pressed steel three prongs fork with 130mm handle. HO102430 £1.19 ea HO09010 £5.31 ea Plant Pots Secateurs Polypropylene. Standard bypass with safety clip. Dimensions: 175mm. HO09050 £11.88 ea HO09165 Diameter Quantity £1.24 pk HO09170 ✓ £4.94 pk 294 75 mm 10 100 mm 10 More products and offers available on our website!

Horticulture ENVIRONMENTAL SCIENCE Garden Accessories continued Plant Growth & Care Composts Hand Sprayer Hozelock spraymist. Capacity £3.66 ea HO92400 500 mL HO09225 Type Quantity £13.06 ea Plant Labels HO09237 £15.56 ea John Innes Potting Compost 25 litres Stick in, write-on, white plant labels. Levington Multipurpose 70 litres Quantity £1.63 pk Plant Food HO102426 100 Greenhouse Max/Min Thermometer Push-button Max/Min Thermometer - a classic design that has long been popular with gardeners. For use in greenhouse or outdoors, the thermometer is clear to read and simple to reset using the push button. Measures in °C and °F. HO102438 £14.31 ea Type Quantity HO92405 Phostrogen Soluble 500 g £5.96 ea HO92408 £4.94 ea Digital Max / Min Thermometers Baby Bio Original 175 mL These large electronic max/min thermometers for outdoor or indoor Hormone Rooting Powder use come in a choice of white or green casing. The triple display shows minimum, maximum and current temperatures simultaneously. Root hormone powder, suitable for soft, medium and hardwood cuttings of non-edible ornamental plants. Specifications: • Sampling rate - every 10 seconds • CE & ROHS/WEEE approved • Requires 1 x AA battery • Water resistant to IP65 • Dimensions (L x W x H): 160 x 78 x 31mm • Weight - 158g (including batteries). • Temperature Range -10 to +40°C • Display Resolution 0.1°C • Accuracy +/-1°C • LCD Dimensions: 79 x 60mm • Triple display Colour £12.36 ea Quantity £4.21 ea HO140100 Green £2.21 pk HO120100 50 g SPARES & ACCESSORIES timstar.com 295 BA01983 2 x AA Batteries [email protected] +44 (0) 3333 442 443

ENVIRONMENTAL SCIENCE Soil Testing Soil Augers Mini Moisture Tester Soil Gouge Auger, Wide Inspection Channel Instantly shows basic watering needs. The broad opening of this soil sampler makes it easier to inspect the soil sample while it is still in the auger. Total length of the sampler is 63€cm long and it yields a soil sample of approximately 49 cm in length with a diameter of 22€mm. Made from electroplated steel. SO13672 £15.56 ea SO150010 £83.69 ea 3 in 1 Soil Meter Soil Meters Provides quick indications of soil moisture pH and light Soil pH Meter conditions. For any number of easy instant pH checks on soil SO96204 ✓ £12.49 ea or compost in the laboratory or garden. Reads direct from soil or compost without sampling. £21.19 ea Soil Thermometers Includes full instructions on adjusting pH to suit Soil Thermometer individual plants. pH readings for pH 3.5 to pH 9.0 instantly shown on the meter’s display. Spirit filled thermometer in aluminium tube -10 to 110°C and 20 to 240°F. SO13665 Dimensions: 225mm. Mini pH Tester Instantly shows acid/alkaline content of soil. SO13680 ✓ £12.26 ea SO13667 £14.94 ea Splashproof Corkscrew Thermometer Soil Moisture & Light Meter This low cost rapid response high accuracy thermometer has a corkscrew tip stainless steel probe and is ideal for frozen food This meter ensures the right individual light and semi-solid and liquid measurements. It could also be used as a soil moisture conditions. Tests the moisture deep thermometer, as the corkscrew tip allows easier entry into harder or down where the roots are. compacted soils. • -50° to 150°C x 0.1° • Data Hold function retains the displayed value • Auto Power Off after 1 hour of no • activity Polycarbonate case with membrane keypad • 12mm LCD with function indicators • 100mm x 8mm diameter corkscrew tip • Stainless Steel Probe • Thermistor sensor is located in the • bottom 10mm of the probe Supplied with probe protector cap and battery SO13670 £26.81 ea EN120530 £36.19 ea 296 More products and offers available on our website!

Soil Testing ENVIRONMENTAL SCIENCE Soil Sieves Soil Test Kits Test Sieves, Plastic Hanna Soil Test Kit Set of five plastic sieves. Mesh openings: 7.5, 9, 11, 13, and 15 mm. This Hanna Soil test kit is ideal for testing and monitoring the quality of the soil. Tests include pH level, nitrogen, phosphorous and potassium. Easy to use - a soil sample is mixed with water and combined with one of the chemical reagents supplied with the kit. The resulting solution is compared to the colour chart supplied to determine the concentration of the element being tested, which is indicated as low, medium or high traces (except pH, which is between pH4 and pH9, in 1pH increments). The kit comes with all the necessary components for 10 tests of each of the 4 parameters or 25 tests x 4 parameters. EN180300 £46.19 set EN120520 Quantity ✓ £36.19 kit EN120525 £93.69 kit 4 x 10 tests 4 x 25 tests Soil Sieves, Plastic Body Advanced Soil Investigation Kit Set of six stainless steel nesting sieves in plastic frame. Complete with This is a more advanced version plastic lid and receiver. Mesh numbers 5, 10, 35, 60, 120, and 230. of our Soil Investigation Kit (EN62645). Each kit contains approximately 0.5 kg bagged samples of each soil type and comes complete with teaching notes. Kit includes the following soil types: Clay Soil; Loam Soil; Chalk-Loam Soil; Chalk Soil; Gravel Soil; Peat Soil; Sandy Soil. EN111005 £17.44 kit EN180000 £58.69 set Soil Investigation Kit For the describing and grouping of soils. Comprising samples (approx. 500 to 750g each) of clay sandy calcareous and peaty soils. Supplied with full teacher’s notes. Soil Sieves, Brass Body Set of six stainless steel nesting sieves in brass frame. Mesh numbers 10, 18, 35, 60, 120, and 230. EN62645 £16.19 kit Soil Types Kit A boxed kit of 12 reference soils. For teaching: geography, forensics, science and agriculture. The kit is used for describing and grouping soils on the basis of characteristics, including appearance, texture and permeability. Includes comprehensive notes on soil characteristics. Contents: 200ml containers of: sandy (2 types), clay (2 types), chalk (A-horizon), chalk (C-horizon), rendzina, silt, organic, podzol, loam. Sieved and air-dried. EN180050 £124.94 set SO96200 £55.63 kit +44 (0) 3333 442 443 [email protected] timstar.com 297

ENVIRONMENTAL SCIENCE Surveying ● Water Testing Clinometers Clinometer Clinometer A lightweight angle and height measuring A compact Clinometer with no external instrument. Point it at the top of a building moving parts and a combined sighting or tree, pull the trigger, and then read the angle-reading eyepiece. A viewing window angle on the protractor. Height is easy to on the side of the Clinometer allows a calculate using the guide supplied second person to check a reading. All angles in degrees followed by a plus or minus to £17.44 ea ME10344 ✓ £13.06 ea indicate an upward or downward slope. Complete with product guide. Dimensions: Binoculars 140mm diameter. Helios Binoculars ‘Fieldmaster EN81525 Porro-prism binoculars offering an Ranging Poles exceptional combination of performance, Ranging Poles features and value. Featuring Bak-4 prisms, multi-coated optics, long-eye For survey field work. PVC covered wooden poles with relief, fold back rubber eye-cups and solid steel points. Red and white graduated every tripod adapter busk. Supplied with neck- 500mm. Dimensions (L x Diameter): strap and case. 2 metres x 28mm. EN07058 ✓ £15.56 ea BI02537 £81.19 ea Water Testing Water Meters Dissolved Oxygen Meter Kit Dissolved Oxygen Kit Simultaneously displays dissolved oxygen and temperature. Units of measure are % saturation mg/L or ppm for dissolved oxygen and °C Convenient kit adds versatility on measuring Dissolved Oxygen in or °F for temperature. Advanced features include data hold 25 points laboratories or out in the field with a 5 m (16 ft) extension cable and memory auto power off automatic temperature compensation salinity and altitude compensation. Careful use and maintenance will provide •probe weight guard for taking easy measurements in tanks or streams. years of reliable service. Easy to replace screw on membrane cap with Oxygen level displayed as % Saturation (0 to 200.0 %) or optional extension cables. Concentration 0 to 20.00 ppm (mg/L) with 2 % FS accuracy • Memory stores up to 25 data readings • Automatic Temperature Compensation • Adjustable Altitude and Salinity Compensation • Includes Extension Cable for remote measurements • CE approved, 1yr warranty (meter) / 6 months conditional • warranty (electrode) Complete with oxygen meter, (WA97305) membrane kit, 5 m (16 ft) extension cable, weighted probe guard and carrying case WA97310 £450.00 kit WA97305 £374.94 SPARES & ACCESSORIES £0.63 ea BA01997 CR2032 Batteries More products and offers available on our website! 298