ABSTRACT
This circuit is an interesting but simple way of demonstrating transistor gain:
Things to do
The parallel lines A and B in the diagram represent two metal contacts spaced with about 1 mm between them. They could be two drawing pins pushed into a small scrap of wood, cork or plastic. Or they could be a pair of stripped copper wires, about 3 cm long, pushed into the sockets of a breadboard, and lying flat on the board. Select the sockets so that the wires have NO contact with each other, either electrical or physical.
