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| const int ledPin = 13;
const int buzzerPin = 12;
const int ldrPin = A0;
void setup () {
Serial.begin(9600);
pinMode(ledPin, OUTPUT);
pinMode(buzzerPin, OUTPUT);
pinMode(ldrPin, INPUT);
}
void loop() {
int ldrStatus = analogRead(ldrPin);
if (ldrStatus < 800) {
tone(buzzerPin, 100);
digitalWrite(ledPin, HIGH);
delay(100);
noTone(buzzerPin);
digitalWrite(ledPin, LOW);
delay(100);
Serial.println(" ALARM ACTIVATED ");
}
else {
noTone(buzzerPin);
digitalWrite(ledPin, LOW);
Serial.println("ALARM DEACTIVATED");
}
} |
