Motion Sensor buzzer

 

      

          Code

#define SENSOR_PIN 2
	#define RELAY_PIN 3
	void setup()
	{
	pinMode(RELAY_PIN, OUTPUT);
	pinMode(SENSOR_PIN, INPUT);
	//Serial.begin(9600);
	}
	void loop()
	{
	//If object movement is detected then the sensor value will be 1 else the value will be 0
	int sensorValue = digitalRead(SENSOR_PIN);
	//Serial.println(sensorValue);
	if (sensorValue == HIGH)
	{
	digitalWrite(RELAY_PIN, LOW); //Relay is low level triggered relay so we need to write LOW to switch on the light
	}
	else
	{
	digitalWrite(RELAY_PIN, HIGH);
	}
	}