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What is HC-SR04 / How to use HC-SR04

So today in this blog we are going to discuss the ultrasonic module HC-SR04, which is quite famous among the Arduino or raspberry pi geeks.  So in this blog, you can able to see how the module works and how to interface that with any kind of projects.SO let's dig into it-


Internal structure - 

This module is packed with an ultrasonic transmitter and an ultrasonic receiver as well as the controller circuit. Though this module packed with many components it is very compact in design, This module has only 4 pins

Pin details-

  1. 5 v supply (VCC)
  2. Trigger pulse pin (input)
  3. Echo pulse pin (output)
  4. Ground (GND)

How it works-

Ultrasonic ranging module is mainly used to measure the distance between some object and the module. It has an ultrasonic transmitter and a receiver, it basically generates a pulse of ultrasonic sound and then the module's receiver part listen the sound reflected by the target object. And after that using a simple formula of physics is applied to calculate the distance between them. 

This module can provide the measurement range between 2 cm - 400 cm.


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