Educational trainer


  • Experimental Training Board has been designed specifically to measure the value of unknown inductance by Hay's bridge.
  • Practical experience on this board caries great educative value for Science and Engineering students.

The board consists of the following built-in parts :
01. Hay's Bridge circuit with arm values

02. ±12V DC at 100 mA, IC Regulated Power Supply internally connected.
03. 1 KHz Sine wave oscillator Output 0 - 15 Vpp.
04. Audio Amplifier and Speaker for Null detection.
05. Three Unknown Value of Inductor Selectable by a band Switch.
06. Potentiometer 10 turn for Selecting desired Resistance Value.
07. Potentiometer for balancing the bridge.
08. Adequate no. of electronic components.
09. Mains ON/OFF switch, Fuse & Jewel light.

* The unit is operative on 230V ±10% at 50Hz AC Mains.
* Adequate no. of patch cords stackable 4mm spring loaded plug length 1/2 meter.
* Good quality, reliable terminals / sockets are provided at appropriate places on panel for connections / observation & waveforms.

  • * Strongly supported by detailed operating Instructions, giving details of object, theory, design procedures, report suggestions and book references.