robot-car: Arduino-Powered Robotic Car 🤖

Overview

This project demonstrates how to build a two-wheeled robotic car using an Arduino. The robot navigates autonomously by detecting and avoiding obstacles, using distance measurements from ultrasonic sensors.

Components

Hardware

• Arduino UNO
• HC-SR04 Ultrasonic Sensors (x3)
• Motors (x2)
  • Typically included in kits with wheels, chassis, power button and 4-slot battery holder.
• L298N Motor Driver
• Power Supply
  • 4-slot battery holder (for the L298N motor driver)
  • 6-slot battery holder (for the Arduino)

Software

• PlatformIO

Wiring Setup

Ultrasonic Sensors

• Trigger Pin:
  • All three sensors share the same trigger pin, connected to pin 11 on the Arduino via a small breadboard.
• Echo Pins:
  • Front sensor: Connect to pin 10
  • Left sensor: Connect to pin 13
  • Right sensor: Connect to pin 12

Motors and L298N Motor Driver

• Left motor: Connect to the L298N motor driver's OUT1 and OUT2.
• Right motor: Connect to the L298N motor driver's OUT3 and OUT4.
• Arduino Connections:
  • Left motor: Connect ENA, IN1 and IN2 to pins 9, 8 and 7, respectively.
  • Right motor: Connect IN3, IN4 and ENB to pins 5, 4 and 3, respectively.

Usage

1. Build and Upload:
   • Compile and upload the code to the Arduino using PlatformIO.
2. Power On:
   • Connect the 6-slot battery holder (with batteries obviously 😅) to the Arduino.
   • Connect the 4-slot battery holder (with batteries) to the L298N motor driver.
   • Turn on the L298N motor driver's power using its power button.
3. Run the Robot: The robot will autonomously navigate and avoid obstacles. 🥳