Project is very easy to accomplish, required:
Copper sheet 240×300 mm. Zinc sheet 240×300 mm. Five rubber insulation 0.3-0.5 mm. Motor 2-3 volts.
The voltage that is produced by the system is of 0.73 volts, 45-50 mA.
* The sheets of copper and zinc can be varied as pleasure larger, increasing the power.
** The Engine 2-3 volts can be retrieved from “cd rom motor”.
*** To secure the success of this experiment, it is necessary to have an motor that has a low power consumption 15-20 mA max. and a voltage of 2-3 volts. It ‘not recommended to use all kinds of motors for toys.