Irwin Powerswitch

Code: EPU0113

A compact power supply offering 2, 4, 6, 8, 10, and 12 volts at currents of up to 5A. Both dc and ac outputs may be used simultaneously up to the rated output. The output is protected by a push button cut-out. The unit is 2A fused on the back panel and comes complete with a moulded mains lead and plug. 4 units are designed to fit in a shallow Gratnell tray.

Description

Specification 

  • Input Supply voltage 230V dc 
  • Supply frequency 50Hz 
  • Mains fuse Rear panel 2A, 20mm quick blow Mains plug 3A 
  • Output Voltage 2, 4, 6, 8, 10, 12V ac nominal 1, 3, 5, 7, 9, 11V full wave rectified dc nominal
  • Maximum output current 5A ac or dc
  • Manufactured in the UK

Quick Comparison

SettingsIrwin Powerswitch removeMounted SBC Lamp Holder - Pack 10 - 12V, 24W Lamp removeBERT - Battery Electrical Resistance Tester removeBrass Small Bayonet Cap Batten Holders - Oval base removeIrwin 4 x D Cell Battery Holder Pack of 10 removeResistance Substitution Box remove
NameIrwin Powerswitch removeMounted SBC Lamp Holder - Pack 10 - 12V, 24W Lamp removeBERT - Battery Electrical Resistance Tester removeBrass Small Bayonet Cap Batten Holders - Oval base removeIrwin 4 x D Cell Battery Holder Pack of 10 removeResistance Substitution Box remove
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Description

Code: EPU0113

A compact power supply offering 2, 4, 6, 8, 10, and 12 volts at currents of up to 5A. Both dc and ac outputs may be used simultaneously up to the rated output. The output is protected by a push button cut-out. The unit is 2A fused on the back panel and comes complete with a moulded mains lead and plug. 4 units are designed to fit in a shallow Gratnell tray.

Solid steel Small Bayonet Cap (SBC) lamp holder with a tough powder coat paint finish and a solid brass lamp holder with 2 x 4mm electrical sockets. Ready to use supplied with a 12V 24W Lamp.

Code: EBR5010

BERT is a simple way of introducing electrical resistance and resistivity to a class. It consists of a circuit board that may be drawn on using the supplied pencil. Connecting the two sides of the board together by a pencil line gives a conducting track and the LED lights. The brightness of the LED gives an indication of the resistance of the path.  Drawing the line thicker decreases the resistance, as does shortening the path. Resistances in parallel may be studied and a “volume control” simply made.   BERT may also be used to test various materials to see whether they are conductors or insulators. Liquids and pastes may also be tested.  The conductivity of the class may be studied as well as how a switch works.  When you are finished the pencil lines may be removed with the supplied eraser.
Class Packs of Brass SBC (Small Bayonet Cap) round lamp holders with an oval base.

Code: ERS8050

A six-decade resistance substitution box designed for use in educational establishments.
Content
Specification 
  • Input Supply voltage 230V dc 
  • Supply frequency 50Hz 
  • Mains fuse Rear panel 2A, 20mm quick blow Mains plug 3A 
  • Output Voltage 2, 4, 6, 8, 10, 12V ac nominal 1, 3, 5, 7, 9, 11V full wave rectified dc nominal
  • Maximum output current 5A ac or dc
  • Manufactured in the UK

Code: OPM5024

Pack of 10 Solid steel Small Bayonet Cap (SBC) lamp holder with a tough powder coat paint finish and a solid brass lamp holder with 2 x 4mm electrical sockets. Ready to use supplied with a 12V 24W Lamp.
A stunningly effective way of teaching the basics of electrical resistance. The kit comprises of: 
  • 1 x BERT circuit board
  • 1 x PP3 battery
  • 1 x 3B pencil
  • 1 x crocodile clip connecting lead
  • 1 x eraser
  • 1 x full set of teaching notes.

Code: OPB3005

Class Packs of Brass SBC (Small Bayonet Cap) round lamp holders with an oval base.

Code: EBH0004

The Irwin Tapped Battery Holder holds 4 x D (R20) batteries with outputs at 1.5, 3, 4.5 and 6V. Batteries and leads not supplied. Each output has a 4mm socket. Manufactured in the UK from premium strong perspex.
  • Simulates resistances from 1Ω to 999,999Ω in 1Ω steps
  • The required resistance is set by selecting the correct value from six rotary decade switches which clearly indicate the value selected by the student
  • An additional 1kΩ resistor is provided connected between one of the terminals of the internal resistance and a third terminal so the unit can be used as an accurate potential divider
  • All outputs are on 4mm terminals with 4mm sockets
  • Housed in a tough ABS box with non-slip rubber feet
  • Voltage rating 250V
  • Power rating 600mW
  • Dimensions 110 x 75 x 50mm
  • Designed and manufactured in the UK
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