Originally Posted by etothepii
HI. I don't mean to invade the thread with a tangent, but I was just pondering this. Have you seen those flashlights that you shake up to generate power? I wonder if there is some way to gut one of those to use as a bike light. Could there be some way to convert to motion of the bike into the necessary motion of the magnet? The beam on those isn't really that bright, I guess, but it could probably power some side and rear lights just for visability.
I believe the LED lights like those mentioned in this thread:
http://www.bikeforums.net/showthread.php?t=297999
use the same principal as the shake lights...moving magnet induces electric current.
Anybody out there correct me if I'm wrong...been a while since freshman electricity & magnetism physics class, heh.