This is my misunderstanding about that "window" coil around the wheel. It wasn't being used but Rick said it was getting 5 v from it. In his diagram, he has 16 magnets. That means the same poles are hitting that coil on both sides. I think that tries to negate each other out and only gives him 5 volts from it. His diagram says it could be used to charge another battery with 5 volts? Wouldn't it make sense for the magnet # around the wheel to be divisible by 3 since that would make N and S on opposite sides of the coil to get more from that window coil?

Even the small one on the roller skate motor, from the magnets alone, there isn't much voltage but it is much higher having the regular coil's magnetic field go through it to cause it to generate the power. I don't know if it really takes away from what is going back to the coil or if it is capturing extra coming back (if it is wrapped to be powered on the collapse instead of the power on pulse).