Arduino UNO: Complete Ultrasonic Sensor Guide (HC-SR04)

This guide will teach you how to connect your HC-SR04 ultrasonic sensor to your Arduino UNO and how to calibrate it to measure distance. Connect your ultrasonic sensor to the Arduino UNO as shown in the diagram. The HC-SR04 has four pins which should be connected as follows:Ultrasonic VCC → Arduin...
By: ColeAndGarrison

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[original story: Instructables]

Instructables 22 Jan 23:05