http://www.outdoorlanternsonsale.com/hand-dynamo/
where can i buy a dynamo?
i would like to make my own power with a old fan by connecting it to a dynamo .would it work? and is it true that the dynamo will create power only at a certain rpm? which would also be true with a car alternator that turns at high speed and is real easy to turn by hand or the altornator makes energy even when i turn it by hand?
thanks for your answers!!
i guess what u want to make is a wind generator... well, have in mind that every generator (a dynamo is a generator) starts giving you power in a certain rpm and you have to look up the specifications of the dynamo. if you want to make a wind generator you have to bare in mind that the fan+dynamo might be too heavy for the wind to turn, or the fan might not be properly design to take advantage of all the energy available in the wind.
you could find a dynamo in stores that sell car parts.
you should also have in mind that when current will start flowing through your system, it will create a brake like effect on your dynamo.
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