Gather the following materials:
1. Cardboard sheet
5. Duct tape
Simple thing to do first is to polish the surface of the coins with the sand paper,
now the coins are nice and shiny we now need to soak the cardboard in vinegar.
Now arrange the coins and cardboard in folowing order [coin cardboard coin….cardboard][the two ends should hav a opposite terminals i.e. coin and cardboard compulsorily]. connect both terminals with alluminium foil for better conduction.
now tape all the stuff with duct tape wire connected to both coins.
If you did this right you should be able to produce about 3-4V of EMF.
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