School Lab Thermoelectric Converter

School Lab Thermoelectric Converter

There is a switch on the thermoconverter to alternate the junction plates between the motor fan or a pair of 4mm sockets.  
A series of semiconducting junction plates are sandwiched between 2 aluminum heat-conducting plates.  
When the 4mm sockets pair are selected and driven with a 5V DC voltage, a temperature difference will be created and conducted by the aluminium plates. 
When a temperature difference exists between the 2 sides of the junction plate, electric current is generated to drive a little fan, providing a visual demonstration of the current produced.