Build Your Own IR CONTROLLED Car with Arduino!

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1. Arduino Uno or equivalent.
2. HW-130 Motor Driver:
   • To control the motors.

1. 4 DC Motors with Gearbox:
   • Two motors grouped for left-side control and two for right-side control.

1. IR Receiver Module (e.g., TSOP1738):
   • To receive signals from the remote.

1. IR Remote Control:
   • For sending directional commands.

1. Robot Chassis:
   • With wheels and a caster wheel for balance.

1. 9V Battery for Arduino.
2. Ni-MH AA 2400mAh Battery Pack:
   • For powering the motors.

1. Breadboard and Jumper Wires:
   • For connecting the IR receiver.

• Motor Outputs:
  • Connect the Left Motors to OUT1 and OUT2.
  • Connect the Right Motors to OUT3 and OUT4.
• Control Inputs:
  • IN1 → Arduino D5 (Left Motors forward/reverse).
  • IN2 → Arduino D6 (Left Motors forward/reverse).
  • IN3 → Arduino D9 (Right Motors forward/reverse).
  • IN4 → Arduino D10 (Right Motors forward/reverse).
• Power Connections:
  • VCC → Positive terminal of the motor battery pack (6V or 7.2V).
  • GND → Common ground shared with Arduino.

• VCC → Arduino 5V.
• GND → Arduino GND.
• OUT → Arduino A5.

• Use the Ni-MH AA battery pack for the motors.
• Use a separate 9V battery for the Arduino.

#include <IRremote.h>
#include <AFMotor.h>

const int RemotePin = A5;

// Initialize IR Receiver (new library usage)
//AF_DCMotor motor1(1);
//AF_DCMotor motor2(2);
AF_DCMotor motor3(3);
AF_DCMotor motor4(4);

void setup() {
Serial.begin(9600);
  // Start the IR receiver with LED feedback enabled
IrReceiver.begin(RemotePin, ENABLE_LED_FEEDBACK);

 // motor1.setSpeed(100); if you want to use it
 // motor2.setSpeed(100); if you want to use it
motor3.setSpeed(250);
motor4.setSpeed(250);
}

void loop() {
  // Check if the IR receiver has received a signal
if (IrReceiver.decode()) {
    // Get the raw code from the remote
unsigned long code = IrReceiver.decodedIRData.decodedRawData;
Serial.print("Received IR code: 0x");
Serial.println(code, HEX);

    // Compare the received code with known button codes
if (code == 0xB946FF00) { // Press UP Button
Forward();
} else if (code == 0xEA15FF00) { // Press Down Button
Backward();
} else if (code == 0xBB44FF00) { // Press Left Button
Left(); //
} else if (code == 0xBC43FF00) { // Press Right Button
Right(); //
} else if (code == 0xBA45FF00) { // Stop
Stop();
}

    // Ready for the next code
IrReceiver.resume();
}
}

void Backward() {
motor4.run(BACKWARD);
motor3.run(BACKWARD);
  //motor2.run(BACKWARD);
  //motor1.run(BACKWARD);
Serial.println("Moving Backward");
}

void Forward() {
motor4.run(FORWARD);
motor3.run(FORWARD);
 // motor2.run(FORWARD);
 // motor1.run(FORWARD);
Serial.println("Moving Forward");
}

void Stop() {
motor4.run(RELEASE);
motor3.run(RELEASE);
  //motor2.run(RELEASE);
  //motor1.run(RELEASE);
Serial.println("Stop Motors");
}

void Left() {
motor4.run(FORWARD);
motor3.run(BACKWARD);
Serial.println("Moving Left");
}
void Right() {
motor4.run(BACKWARD);
motor3.run(FORWARD);
Serial.println("Moving Left");
}

1. IR Receiver:
   • Captures signals from the remote and decodes them into commands.

1. HW-130 Motor Driver:
   • Controls the motors based on the Arduino’s instructions:
     • Forward: Both left and right motors move forward.
     • Backward: Both left and right motors move backward.
     • Left Turn: Left motors move backward, and right motors move forward.
     • Right Turn: Left motors move forward, and right motors move backward.
     • Stop: All motors stop.

1. Simplified Control:
   • Motors are grouped for left and right movement to streamline the control logic.

1. Assemble the Circuit:
   • Connect the motors, motor driver, and IR receiver as described.

1. Upload the Code:
   • Use the Arduino IDE to upload the code to your Arduino Uno.

1. Test the Remote:
   • Use the IR remote to send commands and observe the car’s movement:
     • Forward, Backward, Left, Right, and Stop.

1. Adjust Speed:
   • Modify the motor speed in the analogWrite() function if needed.