Unipolar Stepper Motor Driver Circuit

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This page presents a circuit for driving high-power unipolar stepper motors. Here you will find all the information needed to make your own. This circuit allows step-level control and can be easily modified for other modes of operation.

What you need

  • Power
    • +5v (low power)
    • +12v (high power)
  • ICs
  • Discrete Components
    • (4x) 2N6045 NPN Darlington Transistor
    • (8x) 1N4001 Diodes
    • (2x) 3.3kOhm Resistors
  • Other
    • PC104 or High-Level Controller
    • 12v Unipolar Stepper Motor
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