To demonstrate the conversion from potential energy to electrical energy by winding up a weight on a cord. The falling weight drives a pulley which further drives a generator and a lamp. The unit consists of a steel shaft with pulley mounted on a plastic base. Supplied with spring driving belt.

Base : 220x100mm (length x width)
Pulley : Made of aluminium dia. 55mm.
Shaft : Made of steel, 6mm dia.