I am looking for a way to turn on and off a electromagnet coil mounted on a spinning rotor, as fast as possible.
There can be NO direct mechanical connection. That leaves three trigger sources that I can think of
magnetic, light or sound. Light being the fastest I would think it would be my best choice, but I'm not really sure of that.
Can anyone help me with this? Ideas of any kind would be much appreciated. And maybe some help designing a circuit or where I mite find one.
Thanx