Motor with Spring Unit :-
The kit comprises a number of separately available units. All units are mounted on a 160 x 140 mm base and have 4 mm socket terminals where needed.For showing conversion of potential energy stored in twisted rubber to kinetic/electrical energy. Elastic bands are looped & stretched between pulley and support. A crank handle and pulley combined with ratchet stop allows the rubber to be wound up and released to drive a dynamo, supplied without dynamo.