Microphone Sound Sensor on Arduino

Copyright (c) 2018 Paul van Haastrecht [email protected]

Just because a KY-038 board was part of a experimental-kit that I had bought 2 years ago, I decided to give it try. I was turned out to be a fun exercise.

First to analyse and better understand how the board is working and set it up correctly, second to optimize catching the digital signal and third to make a working example of a three-clap light on and off switch.

In the document I describe in detail the schema and show scoped signals of the board in action. It will provide a better understanding of the challenge and how to connect with the software.

The software is included in appendix of the document. It can be copied and paste into an Arduino IDE. It has been tested with IDE version 1.8.6