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Jason Hernandez
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So... I had an idea for a new invention to generate electricity. Got me a bicycle generator off the Internet. But then came the problem: all the schematics I could find about how to wire up a generator of this type neglected to show one basic thing: which end of the unit is the positive end, and which is the negative end? That kinda matters when connecting the wires. So I took it to my local bike shop to ask. The man behind the counter didn't know; said that with today's longer-lasting batteries, people who used to power their bicycle lights by pedaling just get battery powered ones now. Well, okay, but I'm not trying to power a bicycle light; I'm trying to build a new invention that uses a rotary action similar to pedaling. But now I'm stuck trying to figure out which end of the unit is which.
 
Dillon Nichols
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Location: Victoria BC
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What about spinning up the generator(if not ready for the final mechanism to spin it, you could use a drill, perhaps?) and measuring voltage across the relevant points?
 
thomas rubino
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Location: latitude 47 N.W. montana zone 6A
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Digital or analog volt meter will tell you . Or if you have another electrical item that is reverse polarity protected, you can hook it up and see which wires make it run.
 
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