How do I take a signal from my desk computer or controller (ableton pad or keyboard) and make it activate some sort of claw, that pinches not too hard and vibrates along on plane with variable frequency, amplitude (from 1/4 cm to 1.5" lets say) without excessive force? I will set those parameters after. I also need to be able to operate multiple motors at the same time (8 for now).
Eventually I would like other kind of mechanical motion (hitting, blowing air) if I am successful with this
I want to operate mechanically an instrument with my keyboard, abletonpad or computer keyboard.
The simpler and cheaper the better, no expensive electronic undecipherable gadgets
Where should I look to find such a motor/pinch