Kit#: QK82 STEPPER MOTOR CONTROLLER KIT :
This is the stepper motor controller for the Uni-polar motors. you can drive old disk drive motors and old printer motors easily. If you want to use more heavy motors then you should change its transistors D313 & C945 (darlington pair) with heavy power darlington transistors (like BU508 with diode or other) to make the heavy torque of motor and drive easily.
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