Arduino (any compatible board), HC-SR04 Ultrasonic Sensor, Jumper Wires, Breadboard (optional), #Circuit Diagram: Trig Pin of HC-SR04 → Arduino Pin 9, Echo Pin of HC-SR04 → Arduino Pin 10, VCC of ...

This project demonstrates how to use an ultrasonic sensor to measure the distance to an obstacle using an Arduino. The distance is calculated based on the time taken for an ultrasonic pulse to travel ...