Circuit Documentation

Summary

This circuit is designed to control two stepper motors and an LED using an Arduino UNO. The circuit includes three push buttons: two for controlling the stepper motors and one as a kill switch to cut power to the Arduino. The LED is always on when the circuit is powered.

Component List

1. Arduino UNO

   • Description: 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

2. Stepper Motor One

   • Description: Stepper motor with four control pins and two power pins.
   • Pins: IN1, IN2, IN3, IN4, +, -

3. Stepper Motor Two

   • Description: Stepper motor with four control pins and two power pins.
   • Pins: IN1, IN2, IN3, IN4, +, -

4. 12V Power Supply

   • Description: Power supply providing 12V.
   • Pins: +, -

5. USB Power

   • Description: Power supply via USB.
   • Pins: +, -

6. Push Button Round (Button 1)

   • Description: Push button switch.
   • Pins: leg0, leg1

7. Push Button Round (Button 2)

   • Description: Push button switch.
   • Pins: leg0, leg1

8. Push Button Round (Kill Switch)

   • Description: Push button switch.
   • Pins: leg0, leg1

9. LED: Two Pin (Red)

   • Description: Red LED.
   • Pins: cathode, anode

10. Resistor

    • Description: Resistor with a resistance of 200 Ohms.
    • Pins: pin1, pin2

Wiring Details

Arduino UNO

• 5V connected to Resistor pin2
• D13 connected to Push Button Round (Kill Switch) leg0
• D11 connected to Stepper Motor One IN1
• D10 connected to Stepper Motor One IN2
• D9 connected to Stepper Motor One IN3
• D8 connected to Stepper Motor One IN4
• D7 connected to Push Button Round (Button 2) leg0
• D6 connected to Push Button Round (Button 1) leg0
• D5 connected to Stepper Motor Two IN1
• D4 connected to Stepper Motor Two IN2
• D3 connected to Stepper Motor Two IN3
• D2 connected to Stepper Motor Two IN4

Stepper Motor One

• IN1 connected to Arduino UNO D11
• IN2 connected to Arduino UNO D10
• IN3 connected to Arduino UNO D9
• IN4 connected to Arduino UNO D8
• + connected to 12V Power Supply +
• - connected to 12V Power Supply -

Stepper Motor Two

• IN1 connected to Arduino UNO D5
• IN2 connected to Arduino UNO D4
• IN3 connected to Arduino UNO D3
• IN4 connected to Arduino UNO D2
• + connected to 12V Power Supply +
• - connected to 12V Power Supply -

12V Power Supply

• + connected to Stepper Motor One + and Stepper Motor Two +
• - connected to Stepper Motor One - and Stepper Motor Two -

Push Button Round (Button 1)

• leg0 connected to Arduino UNO D6
• leg1 connected to 12V Power Supply -

Push Button Round (Button 2)

• leg0 connected to Arduino UNO D7
• leg1 connected to 12V Power Supply -

Push Button Round (Kill Switch)

• leg0 connected to Arduino UNO D13
• leg1 connected to 12V Power Supply -

LED: Two Pin (Red)

• cathode connected to 12V Power Supply -
• anode connected to Resistor pin1

Resistor

• pin1 connected to LED: Two Pin (Red) anode
• pin2 connected to Arduino UNO 5V

Code Documentation

/*
 * This Arduino sketch controls two stepper motors and an LED. The two buttons
 * on the right, when pressed, will turn the corresponding stepper motor. The
 * leftmost switch is a kill switch that will cut power to the Arduino. The LED
 * will be on at all times.
 */

// Pin definitions
const int button1Pin = 6;
const int button2Pin = 7;
const int killSwitchPin = 13;
const int ledPin = 13;

// Stepper motor 1 pins
const int stepper1Pin1 = 11;
const int stepper1Pin2 = 10;
const int stepper1Pin3 = 9;
const int stepper1Pin4 = 8;

// Stepper motor 2 pins
const int stepper2Pin1 = 5;
const int stepper2Pin2 = 4;
const int stepper2Pin3 = 3;
const int stepper2Pin4 = 2;

void setup() {
  // Initialize button pins as inputs
  pinMode(button1Pin, INPUT);
  pinMode(button2Pin, INPUT);
  pinMode(killSwitchPin, INPUT);

  // Initialize LED pin as output
  pinMode(ledPin, OUTPUT);

  // Initialize stepper motor pins as outputs
  pinMode(stepper1Pin1, OUTPUT);
  pinMode(stepper1Pin2, OUTPUT);
  pinMode(stepper1Pin3, OUTPUT);
  pinMode(stepper1Pin4, OUTPUT);
  pinMode(stepper2Pin1, OUTPUT);
  pinMode(stepper2Pin2, OUTPUT);
  pinMode(stepper2Pin3, OUTPUT);
  pinMode(stepper2Pin4, OUTPUT);

  // Turn on the LED
  digitalWrite(ledPin, HIGH);
}

void loop() {
  // Check if kill switch is pressed
  if (digitalRead(killSwitchPin) == HIGH) {
    // Turn off the Arduino (simulate by stopping execution)
    while (true) {}
  }

  // Check if button 1 is pressed
  if (digitalRead(button1Pin) == HIGH) {
    // Turn stepper motor 1
    stepperMotor1();
  }

  // Check if button 2 is pressed
  if (digitalRead(button2Pin) == HIGH) {
    // Turn stepper motor 2
    stepperMotor2();
  }
}

void stepperMotor1() {
  // Simple stepper motor sequence for motor 1
  digitalWrite(stepper1Pin1, HIGH);
  digitalWrite(stepper1Pin2, LOW);
  digitalWrite(stepper1Pin3, LOW);
  digitalWrite(stepper1Pin4, LOW);
  delay(10);
  digitalWrite(stepper1Pin1, LOW);
  digitalWrite(stepper1Pin2, HIGH);
  digitalWrite(stepper1Pin3, LOW);
  digitalWrite(stepper1Pin4, LOW);
  delay(10);
  digitalWrite(stepper1Pin1, LOW);
  digitalWrite(stepper1Pin2, LOW);
  digitalWrite(stepper1Pin3, HIGH);
  digitalWrite(stepper1Pin4, LOW);
  delay(10);
  digitalWrite(stepper1Pin1, LOW);
  digitalWrite(stepper1Pin2, LOW);
  digitalWrite(stepper1Pin3, LOW);
  digitalWrite(stepper1Pin4, HIGH);
  delay(10);
}

void stepperMotor2() {
  // Simple stepper motor sequence for motor 2
  digitalWrite(stepper2Pin1, HIGH);
  digitalWrite(stepper2Pin2, LOW);
  digitalWrite(stepper2Pin3, LOW);
  digitalWrite(stepper2Pin4, LOW);
  delay(10);
  digitalWrite(stepper2Pin1, LOW);
  digitalWrite(stepper2Pin2, HIGH);
  digitalWrite(stepper2Pin3, LOW);
  digitalWrite(stepper2Pin4, LOW);
  delay(10);
  digitalWrite(stepper2Pin1, LOW);
  digitalWrite(stepper2Pin2, LOW);
  digitalWrite(stepper2Pin3, HIGH);
  digitalWrite(stepper2Pin4, LOW);
  delay(10);
  digitalWrite(stepper2Pin1, LOW);
  digitalWrite(stepper2Pin2, LOW);
  digitalWrite(stepper2Pin3, LOW);
  digitalWrite(stepper2Pin4, HIGH);
  delay(10);
}

This code initializes the pins for the buttons, LED, and