- Jan 1, 1970
I am planning to convert an exercise bike to a power generator in the following way: the belt of the exercise bike drives a hub which has the front sprocket of a mountain bike attached to it. A bicycle chain drives a standardsix speed sprocket (gear) set and derailleur of a mountain bike attached to a hub which also drives a power generator. My ideas that I could switch gears if I wanted a higher workout. I hire work out at a lower gear would mean that the power generator turns faster. So here are my questions: since I'm charging a 12 V battery the power generator cannot output of a higher voltage but must output more amperage when it turns faster. can anybody recommend which cheap power generator I should buy which changes amperage not voltage with higher rotation speeds? What else do I need? Thank you very muchfor your input.