Building Your First Arduino Robot Car

Start by assembling the robot car chassis. Attach the motors to the chassis using the provided screws and nuts. Make sure the motors are securely fastened and aligned properly.

Attach the wheels to the motor shafts. Ensure they are tightly secured. Then mount the caster wheel at the front for balance.

Mount the L298N motor driver on the chassis. Connect the motor wires to the appropriate terminals on the driver board. Follow the wiring diagram carefully.

Mount the Arduino Uno board and connect the ultrasonic sensor to the servo motor. This will allow the robot to detect obstacles and change direction.

Connect the Arduino to your computer via USB. Open the Arduino IDE and upload the provided code. Make sure to select the correct board and port.

#include <NewPing.h>

#define TRIGGER_PIN  12
#define ECHO_PIN     11
#define MAX_DISTANCE 200

NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

void setup() {
  Serial.begin(9600);
  pinMode(13, OUTPUT);
}

void loop() {
  delay(50);
  unsigned int uS = sonar.ping();
  Serial.print("Ping: ");
  Serial.print(uS / US_ROUNDTRIP_CM);
  Serial.println("cm");
  delay(100);
}

Power on the robot car using the battery pack. Test the obstacle avoidance functionality. Adjust the sensor sensitivity and motor speed as needed.