Micro Amp Pulse Motor
This is homemade electric motor that runs on 3 volts @ 150 micro amps. A simple two transistor circuit controls the firing of a very fine wire coil that pushes the magnet rotor around. I am studying more efficient motors like this that could run for years on two AA batteries.
This is the video that inspired me to start this project: https://www.youtube.com/watch?v=IcR5d1cgW_Q