hi lefty, thanks a lot for your answer.
I don't know much about voltage regulators, could you maybe advise on which one should I try? Should it be 5volts or 9 volts? and how many Amps? mmmh really not sure.
The dynamo I would try to use is a really small one i savaged from a wind up radio. I could maybe try and use the circuit and the battery that came with it but I am not sure that could work.. on the battery it saus: Ni-MH Cell 2.4volts 300mAh
What do you think?
Has anybody else tried this before?
Thanks!