I got some airplane propellers, and went through and found which motors I had that spun fail easy and had shafts that fit with minimal modification or conversion. One is a bipolar 9V, and 2 are 12v (pretty sure) unipolar. Really clueless on how to work the diodes and phases to my best advantage. I'd be happy enough to charge 4.8 volts worth on NiMH batteries, could live with 3.6 volts, but of course more is always better. My load will be an MCU and some LEDs, nothing too heavy for the first experiment. Just want to get a feel for how much useable power I'll have. This is kind of a new direction for me, so no previous experiences. I can do a basic single phase power supply, and can probably get by with that, but I'd think I'd only by making use of maybe half of what is actually generated.