In this tutorial we will learn how the HC-SR04 ultrasonic sensor works and how to use it with Arduino. This is the most popular sensor for measuring distance and making obstacle avoiding robots with Arduino. HC-SR04 Hardware Overview The HC-SR04 is an affordable and easy to use distance measuring sensor which has a range from 2cm to 400cm (about an …

Ultrasonic Sensor (HC-SR04) Testion Using Arduino – Complete GuideRead More