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const int relayPin = 13; const int soundSensorPin = 2; int soundState = 0; int lastSoundState = 0; void setup() { pinMode(relayPin, OUTPUT); pinMode(soundSensorPin, INPUT); } void loop() { soundState = digitalRead(soundSensorPin); if (soundState == HIGH && lastSoundState == LOW) { digitalWrite(relayPin, !digitalRead(relayPin)); delay(200); } lastSoundState = soundState; }
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