Ultrasonic Car + Arduino: Versão em português Unlike the car that follows the line, that needs a line painted in the ground, this is one completely autonomous, since it can see the distance that things are and deviate from them.
Learn how to use ultrasonic sensor HC-SR04 with Arduino, how ultrasonic sensor works, how to connect ultrasonic sensor to Arduino, how to code for ultrasonic sensor, how to program Arduino step by step.