Grove - Sound Sensor

Grove - Sound Sensor

Grove - Sound Sensor can detect the sound strength of the environment. 

The main component of the module is a simple microphone, which is based on the LM358 amplifier and an electret microphone. 

This module's output is analog and can be easily sampled and tested by a Seeeduino.

Hardware Required

- Intel® Edison Module

- Arduino* expansion board

- Grove Base Shield v2

- Grove Sound Sensor

Circuit

Schematic

Code 

// Function: If the sound sensor senses a sound that is up to the threshold you set in the code, the LED is on for 200ms.

// Hardware: Grove - Sound Sensor, Grove - LED

/*macro definitions of the sound sensor and the LED*/

#define SOUND_SENSOR A0

#define LED 2      // the number of the LED pin

#define THRESHOLD_VALUE 400//The threshold to turn the led on 400.00*5/1024 = 1.95v

void setup() 

{

    Serial.begin(115200);

    pins_init();

}

void loop() 

{

  int sensorValue = analogRead(SOUND_SENSOR);//use A0 to read the electrical signal

  Serial.print("sensorValue ");

  Serial.println(sensorValue);

  if(sensorValue > THRESHOLD_VALUE)

  {

    turnOnLED();//if the value read from A0 is larger than 400,then light the LED

    delay(200);

  }

  turnOffLED();

}

void pins_init()

{

  pinMode(LED, OUTPUT);

  pinMode(SOUND_SENSOR, INPUT); 

}

void turnOnLED()

{

  digitalWrite(LED,HIGH);

}

void turnOffLED()

{

  digitalWrite(LED,LOW);

}

See  Also

Reference sites