Published April 15, 2026

RC car

A mobile controlled robotic car built using Arduino Nano, L298N motor driver and HC-05 Bluetooth module.

BeginnerShowcase (no instructions)10 hours16

Things used in this project

Hardware components

Arduino Nano R3

SparkFun Dual H-Bridge motor drivers L298

HC-05 Bluetooth Module

DC Motor, 12 V

Software apps and online services

Arduino IDE

Story

I built this RC car as part of a college RC car competition. Initially, I wasn’t planning to participate, but at the last moment, I decided to take on the challenge. With very limited time available, I designed and assembled the entire car within just 5–6 hours on the day before the competition.

Due to the time constraints, I couldn’t create a proper chassis, so I used a breadboard as the base of the car. Despite this, I successfully managed to complete a functional RC car that was capable of competing.

Although I didn’t win the competition—mainly due to my lack of driving experience—the project was a valuable learning experience. I gained practical knowledge about RC car design, electronics integration, and rapid prototyping under pressure. This project marked an important step in improving my hands-on skills and confidence in building real-world systems.

Code

Code

char command;

int IN1 = 11;
int IN2 = 10;
int IN3 = 9;
int IN4 = 8;

void stopMotors() {
  digitalWrite(IN1, LOW);
  digitalWrite(IN2, LOW);
  digitalWrite(IN3, LOW);
  digitalWrite(IN4, LOW);
}

void setup() {
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);

  stopMotors();

  Serial.begin(9600);
}

void loop() {

  if (Serial.available() > 0) {
    command = Serial.read();
    Serial.println(command);
  }

  if (command == 'F') {
    digitalWrite(IN1, HIGH);
    digitalWrite(IN3, HIGH);
    digitalWrite(IN2, LOW);
    digitalWrite(IN4, LOW);
  }

  else if (command == 'B') {
    digitalWrite(IN2, HIGH);
    digitalWrite(IN4, HIGH);
    digitalWrite(IN1, LOW);
    digitalWrite(IN3, LOW);
  }

  else if (command == 'L') {
    digitalWrite(IN1, LOW);
    digitalWrite(IN2, HIGH);
    digitalWrite(IN3, HIGH);
    digitalWrite(IN4, LOW);
  }

  else if (command == 'R') {
    digitalWrite(IN1, HIGH);
    digitalWrite(IN2, LOW);
    digitalWrite(IN3, LOW);
    digitalWrite(IN4, HIGH);
  }

  else if (command == 'S') {
    stopMotors();
  }

  else {
    stopMotors();
  }

  delay(1);
}

Credits

Het Patel

2 projects • 0 followers

RC car

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

RC car

Code

Code

Credits

Het Patel

Comments

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RC car

RC car

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

RC car

Code

Code

Credits

Het Patel

Comments

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