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I'm looking to control a stepper motor (from an old floppy disk drive-with worm gear attached) without the use of a microcontroller or a commercial stepper motor controller. There would need to be two push buttons - one which will turn the stepper motor in one direction and the other in the other. I want the motor to spin continuously while either button is pushed down. A potentiometer for speed control would be good, but not wholly necessary.