I tried to find this, but didn't quite. I need to control 4 motors (or other device) that will rotate an drinking cup (with 2 oz) 90*, one time. Think along the lines of adding flour to a cake mix.
I know that I can do this with steppers, but only 2. Would it be as simple as using a small motor, on for 2 secs then off. Use some type of mechanical stop or micro switch ?
Of course I'd use some kind of circuit to drive the motors. Like http://itp.nyu.edu/physcomp/Labs/DCMotorControl