HC-SR04 Datasheet (ETC) - Ultrasonic Sensor

HC-SR04, Ultrasonic Sensor

HCSR04 Ultrasonic Sensor Elijah J. Morgan Nov. 16 2014 The purpose of this file is to explain how the HCSR04 works. It will give a brief explanation of how ultrasonic sensors work in general. It will also explain how to wire the sensor up to a microcontroller and how to take/interpret readings. It will also discuss some sources of errors and bad readings. 1.

How Ultrasonic Sensors Work 2.

HCSR04 Specifications 3.

Timing chart, Pin explanations and Taking Distance Measurements