Sound detector is a small tiny chip that combined with microphone used to detect sound in a measuring atmosphere. We can adjust the sensitivity of the sensor using setpoint adjust. The adjustment is done with potentiometer that inbuilt with the board.
The board has an amplifier circuit( LM393 Op-Amp )to amplify the input sound signal.
Operating voltage: 5V
Operating Current: 4~5 mA
Connections to Arduino:
OUT Digital O/P pins
When the detecting sound level exceeds the setpoint, sensor sends the output signal.
Program for Arduino:
//Arduino code for sound sensor
int sensorPin = A0;
void setup ()
void loop ()