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Interfacing Stepper Motor with 8051

  • The stepper motors coil A,B,C,D is connected to the port 1 i.e. to P1.0, P1.2, P1.2 and P1.3.

  • The Microcontroller does not provide sufficient current to drive motor and to safeguard 8081 from loading effect and burn out condition, a motor driver IC ULN 2003 between 8051 and stepper motor. ULN 2003 is a stepper motor driver.

  • The stepper motor is user for controlling:

      • 1. Position control
      2. Direction control &
      3. Speed control

    Interfacing Stepper Motor with 8051


    4-Step sequence:
  • In this type of functioning, the following 4 binary sequence/code are used for rotation: (Considering step angle= 1.8 degrees)

    • Interfacing Stepper Motor with 8051

    8-Step Sequence:
  • In this type of functioning, the following 8 binary sequence/code are used for rotation: (Considering step angle= 0.9degrees)

    • Interfacing Stepper Motor with 8051

    Program

    Interfacing Stepper Motor with 8051

    Interfacing Diagram

    8155 Interfacing






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