How HC-SR04 Ultrasonic sensor works - Arduino Tutorial

Описание: This video is about How How HC-SR04 Ultrasonic sensor works

It emits an ultrasound at 40 000 Hz which travels through the air and if there is an object or obstacle on its path It will bounce back to the module. Considering the travel time and the speed of the sound you can calculate the distance. The HC-SR04 Ultrasonic Module has 4 pins, Ground, VCC, Trig and Echo.

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