Microphone Sound Detection Sensor, Keyes

This modules has a high sensitivity microphone sound detection circuit, with adjustable gain control. Two outputs are provided for sound detection:
– AO, analog output, real-time output voltage signal of the microphone
– DO, when the sound intensity reaches a certain threshold, the output goes high

Please note that this is NOT an audio amplifier! It is meant to detect sounds about a configurable level.

Specifications

• Operating voltage 5V
• 3mm mounting screw holes
• 1 x Analog Output (A0)
• 1 x Digital threshold level output
• High sensitive microphone and high sensitivity circuit
• LED Comparator output indicator
• Standard Pin spacing: 2.54mm
• Size 35mm x 15mm

Documentation, Sample Code and Resources

The following sample Arduino code can be used to turn a LED on when a sound above a certain level is detected.

int Led=13;     //define LED as interface
int buttonpin=3 //Define D0 Sensor as Interface
int val;        //define numeric variables val

void setup()
{
    // Define LED as output interface
    pinMode(Led,OUTPUT);
    
    //Define D0 Sensor as output Interface
    pinMode(buttonpin,INPUT);
}

void loop()
{
    //digital interface will be assigned a value of 3 to read val
    val=digitalRead(buttonpin);
    
    //When the light sensor detects a signal is interrupted, LED flashes
    if(val==HIGH)
    {
        digitalWrite(Led,HIGH)
    }
    else
    {
        digitalWrite(Led,LOW)
    }
}

Package Includes

1 x Sound Detection board with microphone (as shown in picture)