Circuit Documentation

Summary

This circuit is designed to control multiple bipolar stepper motors using A4988 stepper motor drivers and an Arduino Mega 2560 microcontroller. The circuit is powered by a power supply and includes connections for motor control signals and power distribution.

Component List

A4988 Stepper Motor Driver (Red)

• Description: A stepper motor driver capable of driving bipolar stepper motors.
• Pins: ENABLE, MS1, MS2, MS3, RESET, SLEEP, STEP, DIR, VMOT, GND, 2B, 2A, 1A, 1B, VDD

Stepper Motor (Bipolar)

• Description: A bipolar stepper motor with four pins for coil connections.
• Pins: D, B, C, A

Power Supply

• Description: Provides power to the circuit.
• Pins: +, -

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D21/SCL, D20/SDA, D19/RX1, D18/TX1, D17 PWM/RX2, D16 PWM/TX2, D15/RX3, D14/TX3, D0 RX0, D1 TX0, D2 PWM-D13 PWM, AREF, SDA, SCL, D52, D50, D48, D46, D44, D42, D40, D38, D36, D34, D32, D30, D28, D26, D24, D22, D53, D51, D49, D47, D45, D43, D41, D39, D37, D35, D33, D31, D29, D27, D25, D23

Wiring Details

A4988 Stepper Motor Driver (Red)

• VMOT: Connected to VMOT of other A4988 drivers and VIN of Arduino Mega 2560, and + of Power Supply.
• GND: Connected to GND of other A4988 drivers, - of Power Supply, and GND of Arduino Mega 2560.
• VDD: Connected to VDD of other A4988 drivers and + of Power Supply.
• STEP: Connected to D8 PWM, D10 PWM, D4 PWM, and D6 PWM of Arduino Mega 2560.
• DIR: Connected to D9 PWM, D11 PWM, D5 PWM, and D7 PWM of Arduino Mega 2560.
• 2B: Connected to A of Stepper Motors.
• 2A: Connected to C of Stepper Motors.
• 1A: Connected to B of Stepper Motors.
• 1B: Connected to D of Stepper Motors.

Stepper Motor (Bipolar)

• A: Connected to 2B of A4988 drivers.
• B: Connected to 1A of A4988 drivers.
• C: Connected to 2A of A4988 drivers.
• D: Connected to 1B of A4988 drivers.

Power Supply

• +: Connected to VMOT of A4988 drivers and VIN of Arduino Mega 2560.
• -: Connected to GND of A4988 drivers and GND of Arduino Mega 2560.

Arduino Mega 2560

• VIN: Connected to + of Power Supply and VMOT of A4988 drivers.
• GND: Connected to - of Power Supply and GND of A4988 drivers.
• D8 PWM: Connected to STEP of an A4988 driver.
• D9 PWM: Connected to DIR of an A4988 driver.
• D10 PWM: Connected to STEP of an A4988 driver.
• D11 PWM: Connected to DIR of an A4988 driver.
• D4 PWM: Connected to STEP of an A4988 driver.
• D5 PWM: Connected to DIR of an A4988 driver.
• D6 PWM: Connected to STEP of an A4988 driver.
• D7 PWM: Connected to DIR of an A4988 driver.

Documented Code

Arduino Mega 2560 Code

sketch.ino

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

}

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

}

documentation.txt