How I turn a DC current on and off really fast?
I tried using an electromechanical switch, but the current from the battery is too low to produce any appreciable electromagnetism, so the switch didn't work.
I tried using a transistor circuit, but it didn't work either. Again, I think it's because the current is too low to use with the transformer that's used to regulate the transistors.
Anyone else have a solution? I'd rather have it be solid-state, but if the solution needs moving parts that's fine, as long as it works.