To build a hand-held oscillating electromagnet that is capable of causing vibrations in the strings of a guitar or bass that can be picked up by the guitar or bass' pickups.
Oscillator
Wouldn't that be an e-bow? Check it out at
www.ebow.com. I have one, and I love it!
You've got it, but I don't want to have to buy an Ebow, I'd rather figure out how to make it myself.
Try some capacitance across the load to increase the wavelength.
