Hi
I arranged this kind of generator, one magnet is outside of a coil, another magnet is inside the coil. then move one (outside), the magnet inside the coil will flip to generat electricity. I made it light up bicycle lights (No-friction bicycle dynamo).
How it works http://www.freelights.co.uk/how.html
Many people asked me lots of questions:
1. how to make this generator not only light LEDs, but to charge a battery?
2. How to join few this generators together to produce more power?
.....
Thanks