Here is a method to make mobile phone charger using a dynamo mounted on a bicycle. It uses rotatory motion of your bicycle to charge your mobile phone.to make this you require a bicycle dynamo 12V/3W,bridge rectifier module,1000uF/50V capacitor IC7805, mobile phone connector , connecting wire, soldering iron, soldering alloy, general purpose board and cable ties.Assemble the circuit as shown in the figure and fix the dynamo to the wheel.
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