Sound Detector Sensor Module Digital Output w/ Amplifier LM386

  • RM6.36

  • Ex Tax: RM6.00
  • Product Code: Sound Sensor Module
  • Availability: In Stock

This module allows you to detect when sound has exceeded a set point you select.  Sound is detected via a microphone and fed into an LM393 op amp.

The sound level set point is adjusted via an on board potentiometer. When the sound level exceeds the set point, an LED on the module is illuminated and the output is sent low.



  • Output digital switching output (high and low level 0 and 1)
  • Single channel signal output
  • Adjustable sensitivity (shown in Blue digital potentiometer adjust)
  • Detect the intensity of the environment sound
  • Onboard audio power amplifier LM386
  • Mounting hole convenient installation
  • Signal indicator LED light
  • Can be used for Acoustic control light, give sound and light alarm working with Photosensitive sensor ,and sound control,sound detect

Note: This sensor only recognizes the availability of sound (vibration principle) can not identify the size of the sound or the specific frequencies of sound.



  • Operating voltage 3.3 - 5V DC
  • Mic sensitivity : 52dB
  • Frequency range : 50Hz ~ 20KHz 
  • Dimensions: 3.2 x 1.7cm


Connect to Arduino

  • +5V of sound sensor module to VCC(5V) of Arduino
  • OUT of sound sensor module to digital pin 3 of Arduino
  • GND to GND pin of Arduino


Produce a sound close to the sound sensor, the LED will respond.

Arduino Sketch

int Led = 13 ; // define LED Interface
int buttonpin = 10; // define OUT 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);


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