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int sensorPin = A0; //KY-038 microphone
int relay = 13;
int sensorValue = 0;
bool on = false;
void setup ()
{
pinMode (relay, OUTPUT);
digitalWrite (relay, LOW);
Serial.begin (9600);
}
void loop ()
{
sensorValue = analogRead (sensorPin);
Serial.println (sensorValue, DEC);
if (sensorValue > 500) {
/*if (on == true) {
on = false;
} else {
on = true;
}*/
on = !on;
}
digitalWrite (relay, on);
delay(100);
}
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