This demonstration dynamo with hand driver is mounted on a 200 x 125mm base plate. The base carries a 125mm diameter hand-drive pulley coupled to a smaller dynamo pulley by a rubber belt providing a step-up ratio. Electrical output is via a pair of 4mm sockets, with a light emitting diode included as a simple output indicator. The model may also be used as a motor on a 6 to 8V DC supply. Suitable for physics classroom demonstrations of electromagnetic induction and energy conversion.