Microphone

you can see the angualr displacement of the wave on Serial Monitor

hardware

• Arduino Board
• Sound Board

wire

• A0 AO
• VCC +
• GND G

code

const int ledPin = 13;    // pin13 built-in LED
const int soundPin = A0;  // sound sensor attach to A0
void setup() {
  // put your setup code here, to run once:
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);  // initialize the serial communication as 9600bps
}

void loop() {
  // put your main code here, to run repeatedly:
  int value = analogRead(soundPin);  // read the value of sound sensor
  Serial.println(value);
  if (value > 600) {
    digitalWrite(ledPin, HIGH);  // turn on the LED
    delay(200);
  } else {
    digitalWrite(ledPin, LOW);  // turn off the LED
  }
}