‘A simple bike dynamo using a motor as a generator.
WARNING becareful not to get any of the parts from this project caught up in your bike. This dynamo can put out more than 12 volts becareful with your parts or they could get blown.
1 motor 4v (higher voltage is better)
strong plastic lid
hose clamp looks like a metal circle which can be loosend and tightend. choose one to the size of your motor and the size of the bar on your bike.
something electronic like a bulb or buzzer you can test your dynamo on.
By: Fat Bagel
More: continued here