Obstacle-Avoiding Robot Car

Overview

An ultrasonic sensor on a servo scans ahead. Closer than a set distance, the robot stops, looks left and right and turns to the clearer side.

Build Steps

1. 1

   Assemble the chassis

   Mount the motors, wheels and caster, and fix the battery holder underneath.

2. 2

   Wire the driver

   Connect motors to the L298N, battery to its supply and logic pins to the UNO. Share ground.

3. 3

   Mount the scanner

   Fix the HC-SR04 to the servo horn and wire the servo to a PWM pin.

4. 4

   Write the avoid logic

   Drive forward until close, stop, scan both ways, then turn toward the larger distance.