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Arduino UNO-Based Stepper Motor Controller with Rotary Encoder and Key Switch

Image of Arduino UNO-Based Stepper Motor Controller with Rotary Encoder and Key Switch

Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control a bipolar stepper motor using an Arduino UNO, a DRV8825 stepper motor driver, and various other components. The circuit includes a rotary encoder for user input and a key switch module for additional control. The power supply provides the necessary voltage and current to drive the motor and other components.

Component List

Arduino UNO

  • Description: A microcontroller board based on the ATmega328P.
  • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

DRV8825

  • Description: A stepper motor driver capable of driving bipolar stepper motors.
  • Pins: EN, M0, M1, M2, RST, SLP, STEP, DIR, VMOT, GND MOTOR, B2, B1, A1, A2, FAULT, GND LOGIC

A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board

  • Description: An expansion board for controlling stepper motors using A4988 or DRV8825 drivers.
  • Pins: Enabler, Direction, Step, V in Motor, GND Motor and Logic, Microstep 1, Microstep 2, Microstep 3, Reset, Sleep, GND Logic, Fault, 1B, 1A, 2A, 2B, GND Motor, V Motor, 5V Fault Supply

POWER SUPPLY 12V 5AMP

  • Description: A power supply unit providing 12V DC at 5A.
  • Pins: 220V Positive Pole (AC), 220V Negative Pole (AC), GND, GND (DC), 12V-24V Output (DC)

KY-004 Key Switch Module

  • Description: A key switch module for user input.
  • Pins: S, Middle, -

Rotary Encoder

  • Description: A rotary encoder for user input.
  • Pins: clk, dt, sw, gnd, +

Bipolar Stepper Motor (NEMA 17)

  • Description: A bipolar stepper motor commonly used in 3D printers and CNC machines.
  • Pins: A-, A+, B+, B-

Wiring Details

Arduino UNO

  • 5V connected to:

    • KY-004 Key Switch Module (Middle)
    • Rotary Encoder (+)
    • A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board (5V Fault Supply)

  • GND connected to:

    • KY-004 Key Switch Module (-)
    • Rotary Encoder (gnd)
    • A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board (GND Motor and Logic)
    • POWER SUPPLY 12V 5AMP (GND)

  • D10 connected to:

    • A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board (Enabler)

  • D9 connected to:

    • A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board (Direction)

  • D8 connected to:

    • A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board (Step)

  • D7 connected to:

    • Rotary Encoder (clk)

  • D6 connected to:

    • Rotary Encoder (dt)

  • D5 connected to:

    • Rotary Encoder (sw)

  • D4 connected to:

    • KY-004 Key Switch Module (S)

DRV8825

  • VMOT connected to:
    • POWER SUPPLY 12V 5AMP (12V-24V Output (DC))

A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board

  • 1B connected to:

    • Bipolar Stepper Motor (NEMA 17) (A-)

  • 1A connected to:

    • Bipolar Stepper Motor (NEMA 17) (A+)

  • 2A connected to:

    • Bipolar Stepper Motor (NEMA 17) (B+)

  • 2B connected to:

    • Bipolar Stepper Motor (NEMA 17) (B-)

POWER SUPPLY 12V 5AMP

  • 12V-24V Output (DC) connected to:
    • A4988/DRV8825 Stepper Motor Drive Control Board/Expansion Board (V in Motor)

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)

This document provides a comprehensive overview of the circuit, including a detailed component list, wiring details, and documented code for the Arduino UNO.