If you don’t have a neodymium magnet or any other type, you can build a little electric motor with two coils. One that will be the stator and replaces the magnet and the other, the one that turns and that will be the rotor.
- Masking tape
- Enameled copper wire, 24, 26 or 28 AWG.
- Two AA batteries
- A small piece of wood
Enameled copper wire
You can use enameled copper wire that you can get on RadioSack, Amazon or Ebay:
You must remove the enamel from the ends carefully so that the electrical current passes correctly. I used a small Swiss Army knife to remove the enamel.
One or two AA batteries are enough.
The piece of wood
You can use wood or a piece of cardboard, just make sure it is stable and does not bend easily.
You must make sure that when you build the coil, the rotor is perfectly balanced or it will not rotate properly. Test initially with a battery, if it seems that it is not enough, connect two batteries in series.
Note: Be careful, sometimes the wire gets too hot if it does not rotate properly.