This shows the conversion of mechanical energy into electrical energy and the principle of simple AC and DC dynamos. Capable of generating both AC and DC simultaneously as indicated by the glowing of bulbs present on the base. There is a split ring commutator on one side for DC output and slip ring commutator on the other side for AC output, both of which are available through 4mm sockets via a selectable switch. A magnetic field provided by a permanent magnet on top of curved strips. The unit is hand driven.