KY-037 Sensitive Microphone


This module is ideal for sound detection as it has two outputs:

  1. AO, analog output, real-time output voltage signal of the microphone
  2. DO, when the sound intensity reaches a certain threshold, the output high and low signal

The threshold-sensitivity can be adjusted via potentiometer on the sensor

Out of stock


KY-037 Sensitive Microphone Specifications

Electret Condenser Microphone (ECM) sensor with analog voltage signal output which is the real output of the microphone in addition to digital output signal that goes High when the intensity of the sound reaches a certain threshold, the output of the high and low signal threshold-Sensitivity potentiometer adjustment.


Required Hardware Devices

  • Arduino controller × 1
  • KY-037 Sensitive Microphone
  • USB data cable × 1


  • Pin + to Arduino 5+
  • Pin – to Arduino –
  • Pin A0 to Arduino A0 (for analog program)
  • Pin D0 to Arduino 13 (for digital program)

Code: Digital Output

int Led = 13 ;// define LED Interface
int buttonpin = 3; // define D0 Sensor Interface
int val = 0;// define numeric variables val
void setup ()
  pinMode (Led, OUTPUT) ;// define LED as output interface
  pinMode (buttonpin, INPUT) ;// output interface D0 is defined sensor
void loop ()
  val = digitalRead(buttonpin);// digital interface will be assigned a value of pin 3 to read val
  if (val == HIGH) // When the sound detection module detects a signal, LED flashes
    digitalWrite (Led, HIGH);
    digitalWrite (Led, LOW);

Code: Analog Outputs

int sensorPin = A0; // select the input pin for the potentiometer
int ledPin = 13; // select the pin for the LED
int sensorValue = 0; // variable to store the value coming from the sensor
void setup () 
  pinMode (ledPin, OUTPUT);
  Serial.begin (9600);
void loop () 
  sensorValue = analogRead (sensorPin);
  digitalWrite (ledPin, HIGH);
  delay (sensorValue);
  digitalWrite (ledPin, LOW);
  delay (sensorValue);
  Serial.println (sensorValue, DEC);

Additional information

Weight5 g


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