Home › Forums › USEFUL CIRCUITS › STEPPER MOTOR CONTROLLER This topic contains 0 replies, has 1 voice, and was last updated by ifuture 6 years ago. Viewing 1 post (of 1 total) Author Posts November 13, 2012 at 12:54 PM #822 ifutureMember Notes 1. You should be able to substitute any standard (2N3055, etc.) power transistor for Q1-Q4. 2. Every time the STEP line is pulsed, the motor moves one step. 3. S1 changes the motors direction. Attachments:STEPPER-MOTOR-CONTROLLER-CIRCUIT.jpgSTEPPER-MOTOR-CONTROLLER-PARTS.jpg Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.