Project38.Microphone Sound Sensor Module
===========================================

Description
------------
In this tutorial, we will learn about the KY-038 module, how it works and we will 
build a simple project using the KY-038 module and an Arduino.The KY-038 Module 
will be our main component for this tutorial. 

This module has a microphone, and an LM393 differential comparator mounted on a 
breakout board with a potentiometer and several resistors.

Specification
--------------
- Operation Voltage	3.3V ~ 5.5V
- Board Dimensions	1.5cm x 3.5cm
- Weight: 3.1g

Connect
--------
.. image:: /img/connect/38_bb.png

Code
-----
.. code-block:: c
    
    // Arduino and KY-038 module
    void setup ()
    {
    pinMode (13, OUTPUT); // built-in LED pin set to output
    pinMode (8, INPUT); // module digital output connected to Arduino pin 8
    Serial.begin(9600); // initialize serial
    }
    void loop ()
    {
    // display analog and digital values to serial
    Serial.print("Analog pin: ");
    Serial.print(analogRead(A0));
    Serial.print(" | Digital pin: ");
    if (digitalRead(8) == HIGH) {
    Serial.println("High");
    digitalWrite (13, HIGH); // if module value is higher than threshold,
    // switch-On built-in LED
    }
    else {
    Serial.println("Low");
    digitalWrite (13, LOW);
    }
    }

Phenomenon
-----------
.. image:: /img/phenomenon/38.jpg