Circuit Documentation

Summary

This circuit is designed for an Auto Drive Project. It controls a DC motor using an L298N motor driver, reads GPS data from a neo 6m GPS module, and reads compass data from an HMC5883L compass module. The Arduino UNO is used to control the motor and read sensor data.

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. Arduino UNO R4 WiFi

   • Description: Microcontroller board with WiFi capabilities.
   • Pins: OFF, GND, VRTC, IIC0_SCL, IIC0_SDA, 3V3, GPIO 41, GPIO 0, GPIO 42, GPIO 43, GPIO 44, BOOT, IOREF, RESET, 5V, VIN, A0, A1, A2, A3, A4, A5, RSPCKA, CIPO, COPI, D0/RX, D1/TX, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, AREF, SDA, SCL

3. neo 6m GPS

   • Description: GPS module for receiving location data.
   • Pins: VCC, GND, RXD, TXD, PPS

4. HMC5883L Compass

   • Description: Compass module for reading magnetic field data.
   • Pins: DRDY, SDA, SCL, GND, VCC

5. L298N DC Motor Driver

   • Description: Dual H-Bridge motor driver for controlling DC motors.
   • Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

6. DC Motor

   • Description: Standard DC motor.
   • Pins: pin 1, pin 2

Wiring Details

Arduino UNO

• 3.3V connected to HMC5883L Compass VCC
• 5V connected to neo 6m GPS VCC and L298N DC Motor Driver 5V
• GND connected to neo 6m GPS GND, HMC5883L Compass GND, and L298N DC Motor Driver GND
• A4 connected to HMC5883L Compass SDA
• A5 connected to HMC5883L Compass SCL
• D7 connected to L298N DC Motor Driver ENB
• D6 connected to L298N DC Motor Driver ENA
• D5 connected to L298N DC Motor Driver IN4
• D4 connected to L298N DC Motor Driver IN3
• D3 connected to L298N DC Motor Driver IN2
• D2 connected to L298N DC Motor Driver IN1
• D1 connected to neo 6m GPS RXD
• D0 connected to neo 6m GPS TXD

Arduino UNO R4 WiFi

• No specific connections detailed in the provided net list.

neo 6m GPS

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• RXD connected to Arduino UNO D1
• TXD connected to Arduino UNO D0

HMC5883L Compass

• VCC connected to Arduino UNO 3.3V
• GND connected to Arduino UNO GND
• SDA connected to Arduino UNO A4
• SCL connected to Arduino UNO A5

L298N DC Motor Driver

• 5V connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• ENA connected to Arduino UNO D6
• ENB connected to Arduino UNO D7
• IN1 connected to Arduino UNO D2
• IN2 connected to Arduino UNO D3
• IN3 connected to Arduino UNO D4
• IN4 connected to Arduino UNO D5
• OUT3 connected to DC Motor pin 2
• OUT4 connected to DC Motor pin 1

DC Motor

• pin 1 connected to L298N DC Motor Driver OUT4
• pin 2 connected to L298N DC Motor Driver OUT3

Code Documentation

Arduino UNO Code

/*
 * Auto Drive Project
 * This code controls a DC motor using an L298N motor driver, reads GPS data
 * from a neo 6m GPS module, and reads compass data from an HMC5883L compass
 * module. The Arduino UNO is used to control the motor and read sensor data.
 */

#include <Wire.h>
#include <SoftwareSerial.h>

// Pins for L298N motor driver
const int IN1 = 2;
const int IN2 = 3;
const int IN3 = 4;
const int IN4 = 5;
const int ENA = 6;
const int ENB = 7;

// GPS module pins
const int GPS_RX = 0;
const int GPS_TX = 1;

// Compass module I2C address
const int COMPASS_ADDR = 0x1E;

SoftwareSerial gpsSerial(GPS_RX, GPS_TX);

void setup() {
  // Initialize serial communication
  Serial.begin(9600);
  gpsSerial.begin(9600);
  Wire.begin();

  // Initialize motor driver pins
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);
  pinMode(ENA, OUTPUT);
  pinMode(ENB, OUTPUT);

  // Initialize compass
  Wire.beginTransmission(COMPASS_ADDR);
  Wire.write(0x02);
  Wire.write(0x00);
  Wire.endTransmission();
}

void loop() {
  // Read GPS data
  while (gpsSerial.available()) {
    char c = gpsSerial.read();
    Serial.print(c);
  }

  // Read compass data
  int x, y, z;
  Wire.beginTransmission(COMPASS_ADDR);
  Wire.write(0x03);
  Wire.endTransmission();
  Wire.requestFrom(COMPASS_ADDR, 6);
  if (Wire.available() == 6) {
    x = Wire.read() << 8 | Wire.read();
    z = Wire.read() << 8 | Wire.read();
    y = Wire.read() << 8 | Wire.read();
  }
  Serial.print("Compass X: ");
  Serial.print(x);
  Serial.print(" Y: ");
  Serial.print(y);
  Serial.print(" Z: ");
  Serial.println(z);

  // Control motor
  digitalWrite(IN1, HIGH);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, HIGH);
  digitalWrite(IN4, LOW);
  analogWrite(ENA, 255);
  analogWrite(ENB, 255);

  delay(1000);

  digitalWrite(IN1, LOW);
  digitalWrite(IN2, HIGH);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, HIGH);
  analogWrite(ENA, 255);
  analogWrite(ENB, 255);

  delay(1000);
}

Arduino UNO R4 WiFi Code

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

}

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

}

This documentation provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and the code used in the project.