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Obstacle Avoiding Robot 🤖

Final Car Image

Components Needed:

  • Arduino Uno or compatible board
  • 4-wheel chassis kit with DC motors
  • L298N motor driver module
  • Ultrasonic sensor (HC-SR04)
  • SG90 servo motor
  • Jumper wires

Obstacle Avoiding Robot Circuit Diagram:

Circuit Diagram

Method to Make:

Connecting the Four-Gear Motors to the L298N Motor Driver: 🔣

  • Connect the two right motor Red wires to the “OUT4” terminals on the L298N motor driver.
  • Connect the two right motor Black wires to the “OUT3” terminals on the motor driver.
  • Connect the two left motor Black wires to the “OUT2” terminals on the motor driver.
  • Connect the two left motor Red wires to the “OUT1” terminals on the motor driver.

Connecting the Four Inputs of the L298N Motor Driver to the Arduino UNO Board:

  • Connect the IN1 pin of the motor driver to digital pin D4 on the Arduino.
  • Connect the IN2 pin of the motor driver to digital pin D5 on the Arduino.
  • Connect the IN3 pin of the motor driver to digital pin D6 on the Arduino.
  • Connect the IN4 pin of the motor driver to digital pin D7 on the Arduino.

Attaching the SG90 Servo Motor to the Chassis and Connecting It to the Arduino Board: ⚙️

  • Connect the Signal (Orange Wire) from the servo motor to a digital pin D10 on the Arduino.
  • Connect the VCC (Red Wire) from the servo motor to the 5V pin on the Arduino.
  • Connect the GND (Brown Wire) from the servo motor to the GND pin on the Arduino.

Connecting the Ultrasonic Sensor (HC-SR04) with the Arduino Board: 📟

  • Connect the VCC (power) pin of the ultrasonic sensor to the 5V pin on the Arduino.
  • Connect the GND (ground) pin of the sensor to the GND pin on the Arduino.
  • Connect the TRIG (trigger) pin of the ultrasonic sensor to Analog pin A1 on the Arduino.
  • Connect the ECHO pin of the sensor to another Analog pin A2 on the Arduino.

Connect the Battery Power Connection: 🔋

  • Connect the Red wire (+) of the battery holder to the 12V In of the L298N Motor Driver and to the VIN Pin of the Arduino board.
  • Connect the Black wire (-) of the battery holder to the GND In of the L298N Motor Driver and to the GND Pin of the Arduino board.

Add Code in Arduino 👨‍💻

Here is a simple example of how to control the robot using the ultrasonic sensor to avoid obstacles:

Made With ❤️ By Chirag Joshi

Check out my GitHub profile here 👨‍💻