Timstar - Science

Lens ended bulbs, with MES bases, producing focused beam of light. Commonly used in torches and applications where directed beam is required. Dimensions: Diameter 9.5 mm (max.) length 24 mm (overall).

12 V bulbs, with SBC fitting, and radial (horizontal) filaments. Can be used in ray box if the bulb holder is rotated such that the filament is parallel to the beams, effectively making it point source. Dimensions 35 x 19 mm. Power 5 W.

12 12 bulbs, with SBC fitting, and radial (horizontal) filaments. bulbs, with SBC fitting, and radial (horizontal) filaments. Can be used in ray box if the bulb holder is rotated such that the filament is parallel to the beams, effectively making it point source.

12 V, 36 W bulb, with SBC fitting, and axial (vertical) filaments. Suitable for ray boxes. Dimensions 55 x 38 mm (L x Dia)

12 V, 48 W bulb, with SBC fitting, and axial (vertical) filaments. Suitable for ray boxes. Dimensions 55 x 38 mm (L x Dia)

Twelve non-electrolytic capacitors selected by a rotary switch mounted on the outer casing. Capacitance values available: 100pF; 220pF; 470pF; 2.2nF; 4.7nF; 10nF; 22nF; 47nF; 220nF; 1µF. Connection by 4 mm sockets.

Electric bell, comprising plastic case with removable cover, and (70 mm) metal plated gong. Runs off 4-6 V AC or DC, via flying mm plug-leads.

A higher quality, more reliable bell manufactured in the EU. Operates on 5-8 V.

Single tone output, panel mounting, transistor oscillator DC buzzer. • Voltage: 6 V • Rated current: 25 mA • Frequency: 400±100 Hz • Sound output: 70-75 dB 30 cm • 100 mm colour-coded leads

Packs of 10 low cost miniature buzzers. These come complete with flying leads and are ideal for educational projects and general purpose use. • Current: 30 mA • Dimensions (L x W x H): 23 x 17 x 15 mm • Fixing Centres: 27.5 mm • Lead Length: 80 mm

A general purpose low signal switching diode, this 1N4148 diode has an operating voltage of 75 V and current rating of 150 mA max.

DO-41 Plastic case, 1 A silicon rectifier diodes. 1 A/50 V.

Photoconductive cadmium sulphide light dependent resistor (LDR) in a miniature epoxy sealed open frame package (4 mm dia.). Cell resistance reduces as light falling on the device increases. Typical applications include light control, cameras, toys etc. Sold as pack of 10. • Peak spectral response: 540 nm. • Light resistance: 50-100 Kohm • Dark resistance: 20 Mohm minimum • Max. voltage: 100 V • Power max: 90 mW • Working temp. range: -20 to +60°

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. 550 nm. Cell resistance: 9 kΩ at 10 lux. 400 Ω at 1000 lux. Dark resistance: Min. 1 MΩ. Sold as pack of 5.

High quality 5 mm LED indicators with diffused lens. Maximum voltage 3.0 V DC. PCB or panel mount. Sold as pack of 10.

High quality 5 mm LED indicators with diffused lens. Maximum voltage 3.0 V DC. PCB or panel mount. Sold as pack of 10.

High quality 5 mm LED indicators with diffused lens. Maximum voltage 3.0 V DC. PCB or panel mount. Sold as pack of 10.

High quality 5 mm LED indicators with diffused lens. Maximum voltage 3.0 V DC. PCB or panel mount. Sold as pack of 10.

High quality 5 mm LED indicators with diffused lens. Maximum voltage 3.0 V DC. PCB or panel mount. Sold as pack of 10.

Miniature, circular DC motors, ideal for models and educational applications. The MM10 version has flat side. RoHS compliant. Sold as pack of 10.

Miniature, circular DC motors, ideal for models and educational applications. The MM10 version has flat side. RoHS compliant. Sold as pack of 10.

Miniature, circular DC motors, ideal for models and educational applications. The MM10 version has flat side. RoHS compliant. Sold as pack of 10.

Ideal for projects, providing high power and low speed and designed to fit our MM28 type motors. The Perspex base incorporates holes for screw fixing if required. The assembly also includes precision worm and gearwheel, and 150 mm long 4 mm dia. output shaft. RoHS compliant. Motor not included.

High quality wire-wound controls, ideal for loudspeaker volume 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 6 mm.

6 W, 5 % tolerance wire-wound power resistors which have flame retardant coating, along with ceramic cores and metal alloy resistance wire, offering high resistance stability, excellent heat dissipation and low noise. Sold in packs of 10. • Power rating: 6 W • Resistance tolerance: ±5 % • Max. working voltage: 350 V • Temperature range: -55 °C to +155 °C • Dimensions: 24 x 8 mm

6 W, 5 % tolerance wire-wound power resistors which have flame retardant coating, along with ceramic cores and metal alloy resistance wire, offering high resistance stability, excellent heat dissipation and low noise. Sold in packs of 10. • Power rating: 6 W • Resistance tolerance: ±5 % • Max. working voltage: 350 V • Temperature range: -55 °C to +155 °C • Dimensions: 24 x 8 mm

A kit containing total of 1000 0.25W 5% carbon film resistors. Values ranging from 4.7Ω through to 10MΩ. total of 63 different values, this makes an ideal starter kit.

Miniature low cost push to make switch with red button. Sold in packs of 10.

Contact make-and-break switch (push to make) with sprung contact, mounted on an insulated base.

A mini toggle switcs, which is rugged and reliable. Complete with fittings for mounting. Rating: 1 A 250 V AC Contacts: Nickel plated brass. Panel cut-out: 7.0 mm.

30 Ohm NTC (Negative Temperature Coefficient) miniature disc thermistors, for general purpose applications such as temperature measurement and thermal compensation circuits. Also useful in the classroom for demonstrating how the resistance changes with temperature. thermistor is temperature dependant resistor or 'thermal resistor'. The thermistors are clearly coded. Sold in packs of 10. • Temperature range: -30 °C to +125 °C • Tolerance: 10 %

Nickel plated steel.Takes 4 mm plug. 10 max current.

For DC only with 4 mm terminals.

This analogue voltmeter, specifically designed for use by students, is sturdy instrument for measurement of both AC and DC voltage. The instrument comes with DC/AC switch and has three voltage ranges. Analogue meters can be more useful than digital meters for certain applications, and often provide more visually stable reading. This instrument is electronically protected against overload but must not be connected to voltages exceeding 30 V. • AC and DC ranges: 0-3 V; 0-15 V; 0-30 • Precision: 2 of full scale • Impedance: 10 kΩ/V • Electronically protected against overload • Dimensions: 158 x 108 x 56 mm • Scale length: 72 mm

This analogue ammeter, specifically designed for use by students, is sturdy instrument for measurement of both AC and DC current. The instrument comes with DC/AC switch and has three current ranges. Analogue meters can be more useful than digital for certain applications, and often provide more visually stable reading. This instrument is electronically protected against overload and will tolerate overloads up to 15 for at least 10 seconds. • AC and DC ranges: 0-0.05 A; 0-0.5 A; 0-5 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

This galvanometer, specifically designed for use by students, is sturdy but sensitive instrument for the measurement of small currents. The instrument has centre-zero scale and three current ranges and is electronically protected against overload, tolerating overloads of up to up to A for at least 10 seconds. • DC ranges: ± 5 mA; ± 500 μA; ±50 μA • Centre-zero scale • Precision: ± 5 % of full scale • Internal resistance: ± 5 mA: ca. Ω; ± 500 µA: ca. 90 Ω; ± 50 µA: ca. 900 Ω • Electronically protected against overload • Dimensions: 158 x 108 x 56 mm • Scale length: 72 mm

Moving coil DC milliammeters with zero adjust, fully enclosed in robust housing, with clear acrylic front cover. • Scale length: 60 mm • Accuracy: ±2.5 % • Dimensions: 125 x 80 x 80 mm

Moving coil DC milliammeters with zero adjust, fully enclosed in robust housing, with clear acrylic front cover. • Scale length: 60 mm • Accuracy: ±2.5 % • Dimensions: 125 x 80 x 80 mm

Economical analogue bench meters designed for education. Large, easy-to-read scales. Connection via 4 mm terminal posts. • Accuracy: 2.5 % • Dimensions: 100 x 133 x 97 mm

Economical analogue bench meters designed for education. Large, easy-to-read scales. Connection via 4 mm terminal posts. • Accuracy: 2.5 % • Dimensions: 100 x 133 x 97 mm

Moving coil DC microammeter with zero adjust, fully enclosed in robust housing, with clear acrylic front cover. • Range: 0-500 µA • Resolution: 10 µA • Scale length: 60 mm • Dimensions: 125 x 80 x 80 mm

Economic, robust digital meters, housed in sturdy ABS case with clear LCD screen. Input is via 4 mm sockets on the front panel, which features an on/off switch. Each meters requires a 9 V, PP3 battery (NOT included). Dimensions (W x D x H): 100 x 140 x 100 mm.

Economic, robust digital meters, housed in sturdy ABS case with clear LCD screen. Input is via 4 mm sockets on the front panel, which features an on/off switch. Each meters requires a 9 V, PP3 battery (NOT included). Dimensions (W x D x H): 100 x 140 x 100 mm.

Supplied in strong high grade ABS case with large bold LCD and 4 mm colour coded sockets. Powered by 1 x 9V PP3 Battery (supplied). Dimensions (L x W x H): 95 x 90 x 75mm.

Supplied in strong high grade ABS case with large bold LCD and 4 mm colour coded sockets. Powered by 1 x 9V PP3 Battery (supplied). Dimensions (L x W x H): 95 x 90 x 75mm.

This meter comes in a moulded plastic cases and features a 25 mm LCD. Input is via colour coded 4 mm sockets and the unit is short circuit and overload protected. Powered by a 9 PP3 battery (not supplied). Dimensions (L x W x D): 115 x 80 x 45 mm.

This meter comes in a moulded plastic cases and features a 25 mm LCD. Input is via colour coded 4 mm sockets and the unit is short circuit and overload protected. Powered by a 9 PP3 battery (not supplied). Dimensions (L x W x D): 115 x 80 x 45 mm.

This meter comes in a moulded plastic cases and features a 25 mm LCD. Input is via colour coded 4 mm sockets and the unit is short circuit and overload protected. Powered by a 9 PP3 battery (not supplied). Dimensions (L x W x D): 115 x 80 x 45 mm.

This meter comes in a moulded plastic cases and features a 25 mm LCD. Input is via colour coded 4 mm sockets and the unit is short circuit and overload protected. Powered by a 9 PP3 battery (not supplied). Dimensions (L x W x D): 115 x 80 x 45 mm.

This updated USB version of the low voltage Joulemeter includes datalogging and an improved specification and can be used with or without computer. Designed to be simple enough to use at KS3, and flexible enough for more advanced use at KS4 and beyond, the Joulemeter simply requires an input supply and load to be plugged in (e.g. solar panel and motor) and the meter will display the values of the power and the energy transferred. For simplicity, the instrument automatically adjusts the display to show suitable units and an appropriate number of decimal places, so that it can deal with a very wide range of values (e.g. for energy, from 100 nanojoules up 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 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 (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)