Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, two ULN 2003 motor drivers, two 28BYJ-48 stepper motors, and an HC-SR04 ultrasonic sensor. The Arduino UNO controls the stepper motors through the ULN 2003 drivers and reads distance measurements from the ultrasonic sensor.

Component List

28BYJ-48 Stepper Motor

• Description: A small, inexpensive stepper motor commonly used in various applications.
• Pins: BLUE, PINK, YELLOW, ORANGE, RED

HC-SR04 Ultrasonic Sensor

• Description: A sensor used to measure distance by using ultrasonic waves.
• Pins: VCC, TRIG, ECHO, GND

ULN 2003

• Description: A Darlington transistor array used to drive the stepper motors.
• Pins: IN1, IN2, IN3, IN4, IN5, IN6, IN7, GND, +, COIL1, COIL2, COIL3, COIL4, COIL5

Arduino UNO

• Description: A microcontroller board based on the ATmega328P, used to control the circuit.
• 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

Wiring Details

28BYJ-48 Stepper Motor 1

• BLUE: Connected to ULN 2003 (COIL1)
• PINK: Connected to ULN 2003 (COIL2)
• YELLOW: Connected to ULN 2003 (COIL3)
• ORANGE: Connected to ULN 2003 (COIL4)
• RED: Connected to ULN 2003 (COIL5)

28BYJ-48 Stepper Motor 2

• BLUE: Connected to ULN 2003 (COIL1)
• PINK: Connected to ULN 2003 (COIL2)
• YELLOW: Connected to ULN 2003 (COIL3)
• ORANGE: Connected to ULN 2003 (COIL4)
• RED: Connected to ULN 2003 (COIL5)

HC-SR04 Ultrasonic Sensor

• VCC: Connected to Arduino UNO (5V)
• TRIG: Connected to Arduino UNO (D7)
• ECHO: Connected to Arduino UNO (D6)
• GND: Connected to Arduino UNO (GND)

ULN 2003 Driver 1

• IN1: Connected to Arduino UNO (D9)
• IN2: Connected to Arduino UNO (D10)
• IN3: Connected to Arduino UNO (D11)
• IN4: Connected to Arduino UNO (D12)
• GND: Connected to Arduino UNO (GND)
• +: Connected to Arduino UNO (5V)
• COIL1: Connected to 28BYJ-48 Stepper Motor 1 (BLUE)
• COIL2: Connected to 28BYJ-48 Stepper Motor 1 (PINK)
• COIL3: Connected to 28BYJ-48 Stepper Motor 1 (YELLOW)
• COIL4: Connected to 28BYJ-48 Stepper Motor 1 (ORANGE)
• COIL5: Connected to 28BYJ-48 Stepper Motor 1 (RED)

ULN 2003 Driver 2

• IN1: Connected to Arduino UNO (D5)
• IN2: Connected to Arduino UNO (D4)
• IN3: Connected to Arduino UNO (D3)
• IN4: Connected to Arduino UNO (D2)
• GND: Connected to Arduino UNO (GND)
• +: Connected to Arduino UNO (5V)
• COIL1: Connected to 28BYJ-48 Stepper Motor 2 (BLUE)
• COIL2: Connected to 28BYJ-48 Stepper Motor 2 (PINK)
• COIL3: Connected to 28BYJ-48 Stepper Motor 2 (YELLOW)
• COIL4: Connected to 28BYJ-48 Stepper Motor 2 (ORANGE)
• COIL5: Connected to 28BYJ-48 Stepper Motor 2 (RED)

Arduino UNO

• 5V: Connected to ULN 2003 Driver 1 (+), ULN 2003 Driver 2 (+), HC-SR04 Ultrasonic Sensor (VCC)
• GND: Connected to ULN 2003 Driver 1 (GND), ULN 2003 Driver 2 (GND), HC-SR04 Ultrasonic Sensor (GND)
• D9: Connected to ULN 2003 Driver 1 (IN1)
• D10: Connected to ULN 2003 Driver 1 (IN2)
• D11: Connected to ULN 2003 Driver 1 (IN3)
• D12: Connected to ULN 2003 Driver 1 (IN4)
• D7: Connected to HC-SR04 Ultrasonic Sensor (TRIG)
• D6: Connected to HC-SR04 Ultrasonic Sensor (ECHO)
• D5: Connected to ULN 2003 Driver 2 (IN1)
• D4: Connected to ULN 2003 Driver 2 (IN2)
• D3: Connected to ULN 2003 Driver 2 (IN3)
• D2: Connected to ULN 2003 Driver 2 (IN4)

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)