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Scheme |
/*
* Monitor for sound sensor
*/
int micPin = 2; // select the input pin
int ledPin = 13; // select the pin for the LED
int val = 0;
int amp = 0;
void setup() {
pinMode(ledPin, OUTPUT); // declare the ledPin as an OUTPUT
Serial.begin(9600);
}
void loop() {
val = analogRead(micPin);
amp = (val >= 512) ? val - 512 : 512 - val; //it is a ternary operator. X = A ? B : C; if A is true X = B, otherwise C
if (amp > 100)
{
digitalWrite(ledPin, HIGH);
delay(10);
}
else
{
digitalWrite(ledPin, LOW);
}
Serial.println(amp);
}
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