Circuit Documentation

Summary

This circuit primarily consists of an Arduino UNO microcontroller that is used to control multiple 28BYJ-48 Stepper Motors through ULN2003A breakout boards. The motors are driven by signals from the Arduino, which are amplified by the ULN2003A driver boards. A MB102 Breadboard Power Supply Module provides power to the system.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

28BYJ-48 Stepper Motor (x3)

• A small, 5-volt geared stepping motor
• It has a stride angle of 5.625°/64 and can be used in various types of automation projects.

ULN2003A Breakout Board (x3)

• A board with a ULN2003A darlington transistor array, used for driving high-current loads.
• It has inputs for controlling the outputs, which are connected to the stepper motor.

MB102 Breadboard Power Supply Module 3.3V/5V

• A power supply module that can output a selectable 3.3V or 5V.
• It is used to power the breadboard and the components on it.

Wiring Details

Arduino UNO

• A0 to ULN2003A breakout board In 4
• A1 to ULN2003A breakout board In 3
• A2 to ULN2003A breakout board In 2
• A3 to ULN2003A breakout board In 1
• GND to ULN2003A breakout board 0V (Common Ground)
• D12 to ULN2003A breakout board In 4
• D11 to ULN2003A breakout board In 3
• D9 to ULN2003A breakout board In 2
• D8 to ULN2003A breakout board In 1
• D5 to ULN2003A breakout board In 4
• D4 to ULN2003A breakout board In 3
• D3 to ULN2003A breakout board In 2
• D2 to ULN2003A breakout board In 1

28BYJ-48 Stepper Motor

• BLUE wire to ULN2003A breakout board BLUE wire
• PINK wire to ULN2003A breakout board PINK wire
• YELLOW wire to ULN2003A breakout board YELLOW wire
• ORANGE wire to ULN2003A breakout board ORANGE wire
• RED wire to ULN2003A breakout board RED wire

ULN2003A Breakout Board

• In 1 to Arduino UNO D8/D2/A3
• In 2 to Arduino UNO D9/D3/A2
• In 3 to Arduino UNO D11/D4/A1
• In 4 to Arduino UNO D12/D5/A0
• 0V to Arduino UNO GND (Common Ground)
• +5V to MB102 Breadboard Power Supply Module VCC
• ON/OFF jumper switch (not connected)
• BLUE wire to 28BYJ-48 Stepper Motor BLUE
• PINK wire to 28BYJ-48 Stepper Motor PINK
• YELLOW wire to 28BYJ-48 Stepper Motor YELLOW
• ORANGE wire to 28BYJ-48 Stepper Motor ORANGE
• RED wire to 28BYJ-48 Stepper Motor RED

MB102 Breadboard Power Supply Module 3.3V/5V

• VCC to ULN2003A breakout board +5V
• GND to ULN2003A breakout board 0V (Common Ground)

Documented Code

Arduino UNO Code (sketch.ino)

// Arduino stepper motor control code
#include <Stepper.h> // Include the header file
// change this to the number of steps on your motor 
#define STEPS 32
// create an instance of the stepper class using the steps and pins 
Stepper stepper(STEPS, 8, 9, 10, 11);
int val = 0;

void setup() { 
    Serial.begin(9600); 
    stepper.setSpeed(200);
}

void loop() {
    if (Serial.available()>0)
{
     val = Serial.parseInt(); 
     stepper.step(val); 
     Serial.println(val); //for debugging
}
}

This code snippet is responsible for controlling the stepper motor via the Arduino UNO. It initializes the stepper motor with a specific number of steps and sets up the serial communication for debugging. The loop function listens for serial input to determine the number of steps the motor should take.

Additional Microcontroller Code

The additional microcontroller code provided is empty or contains only the default setup() and loop() functions without any operational code. Therefore, it is not included in this documentation.