Powerbase

This is our version of the Irwin Powerbase 32. It is electrically identical to the Irwin model. The main difference is that the case is manufactured from sturdy, powder coated steel rather than plastic.  0-15V ac, 0-20V smoothed dc at up to 8A.  Short circuit protected and with a maximum voltage lock.

Powerbase    £135.00

Powerswitch Plus

This is a dual output power supply offering all the advantages of our Powerswitch (2, 4, 6, 8, 10, 12V ac/dc @ 5A) plus a 0-12V smoothed and regulated continuously variable dc output @3A. Overload protected on the ac side by a resettable cutout and on the dc side by automatic electronic circuitry. Up to 5A combined currrent may be drawn.

Powerswitch Plus  £122.50

Audio Signal Generator

Green Laser Ray Box

* No blackout required

* No powerpacks to move from lab to lab

* No risk of burning from hot lamps

* No replacement lamps to buy - lasers last at least 5,000 hours

A battery operated green laser raybox that may be used in classrooms without blackout facilities. The green laser light has a wavelength of 532nm, which is extremely close to the peak response of the human eye. This means that although the same power as our red laser rayboxes, the green laser light appears many times brighter. All our rayboxes contain Class 2 laser elements - Class 2 is the only type of laser approved for use in schools.

The green laser raybox produces a bright green line that may be easily used for reflection, refraction and diffraction experiments.  The unit is powered by two AAA cells (not supplied - Alkaline Manganese type are recommended) but can easily be converted for plugtop power supply operation. Click here for details.

Battery Operated

                  Green Laser Ray Box                                 £36.00

                  Green Laser Ray Box (5 or more)            £27.00            

Battery/mains Operated

                  Green Laser Ray Box + PSU                      £44.00

                  Green Laser Ray Box + PSU (5 or more) £33.50            

Red Laser Ray Box

A red (650nm) version of the above laser ray box. Has all the advantages of the above except that the beam is not as bright. May be easily converted to produce a spot for diffraction demonstrations etc. Uses two AAA alkaline cells or may readily be converted for plug top PSU use.

Battery Operated

Red Laser Ray box                                         £25.00                                     

Red Laser Ray Box (5 or more)                   £20.00

Battery/mains Operated

Red Laser Ray Box + PSU                           £33.00

Red Laser Ray Box + PSU (5 or more)     £26.80

Red and Green Demonstration Lasers

The above laser ray boxes are also available as demonstration lasers, which project a bright spot of laser light for use in diffraction and holography experiments.  The price of all variants is the same as for the equivalent laser ray box.

Demonstration Colour Mixing Apparatus

Following the success of our small colour mixing apparatus, we were asked to design something that could be used by teachers for demonstrations. 

The kit comprises, essentially, a scaled up version of our small colour mixing apparatus.   A robust,upright case contains three, high power, accurately colour matched leds, each of which has infinitely adjustable brightness. Also supplied is a large, free standing, primary colour shadow mask, a hand held secondary colour mask and a 12V plug top power supply. 

The system allows the teacher to project large primary and secondary colour mixing disks onto any vertical surface and to adjust the colour saturation to mix virtually any colour (How do you produce brown?).  Unlike other systems the purity of the resulting white is outstanding.

The unit is extremely easy to use, is easily transportable and comes with full instructions. The only other requirements are a white wall and a darkened/blacked out room.

The system may be used to demonstrate both secondary and primary colour mixing, colour shadows and colour reflection/absorption.

Demonstration Colour Mixing Apparatus with plug top PSU                                                £63.00

Mini National Grid Simulator

The system comprises two printed circuit boards fitted with step up/step down transformers, 4mm low voltage connectors, "high voltage" jack sockets, 2.5V MES lamps and a set of "HT" leads.  The system is classified as Safety Electrical Low Voltage - in other words it does not generate harmful voltages and is safe for pupil use.  The system allows the pupil to investigate the effect of stepping up the voltage to transmit power, as used in the National Grid.  All it requires are two, 4mm plugged leads and a 2V ac power source.  Comes complete with a 1.2m long set of transmission cables and full instructions.

Mini National Grid Simulator                                                                                          £49.00      

1.5-30V @ 1A dc Regulated Power Supply with digital metering

The unit is a compact, lightweight bench-top power supply in a stylish enclosure. Designed as an affordable yet highly functional piece of lab equipment, connection to the power supply is via standard pitch (19mm) 4mm sockets. The continuously adjustable output voltage can be set to within 0.1V, using the adjustment dial on the front of the unit and the current may be read to a resolution of 0.01A. Overvoltage/current and short circuit protection.  A large backlit LCD displays the output voltage and the current being drawn. The PSU measures only 135 x 140 x 53mm (5.3" x 5.5" x 2.1") and can be tilted to adjust the viewing angle of the display.

1.5-30V, 1A PSU                                                                              £69.00                                                                                                                                                                  

BERT - Battery Electrical Resistance Tester

A self contained resource to aid understanding of electrical resistance

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An extremely versatile kit for teaching about electrical resistance and resistivity.  Draw a pencil line across BERT, study the LED brightness. Then make the line wider. What happens? Draw a second line in parallel. Change the length of the lines. Change the thickness (height) of the line. Can be used to compare conductors and insulators including the entire class! Test the conductivity of liquids.

Comes with PP3 battery, crocodile clip lead, eraser, pencil and comprehensive instructions.

Have a look at the instructions and suggested experiments by clicking here.

BERT                                                                                                                                                                              £15.00

Black Box Electricity/Electronics system                              Modules from £2.20

The Black box system comprises a series of dedicated circuit components, each housed in a black ABS case.

Each module may be linked to another via 4mm plugged leads. The system may be used to teach everything from basic electricity "bulb and battery" circuits up to quite sophisticated electronic circuits. The component modules are available individually or in kits. A full list of component modules and prices is available by clicking here.