Interfacing PIR sensor with Arduino

1int sensorPin = 3; // connect PIR sensor to digital pin 3
2int ledPin  = 4;    // connect LED to digital pin 4
3int buzzerPin = 5; // connect buzzer  to digital pin 5
4
5void setup() {
6  Serial.begin(9600);
7  pinMode(sensorPin,  INPUT); 
8  pinMode(ledPin, OUTPUT);      // declare all pins as OUTPUT
9  pinMode(buzzerPin,  OUTPUT);  
10  
11
12  
13}
14
15void loop() {
16  
17  if(digitalRead(sensorPin)  == HIGH)   // if the value of pulse from PIR sensor is HIGH then LED will glow and  buzzer will ring
18  {
19    digitalWrite(ledPin, HIGH);
20    digitalWrite(buzzerPin,  HIGH);
21    Serial.println("THERE IS SOME MOTION IN FRONT OF SENSOR");
22  }
23  else                                 
24  {
25    digitalWrite(ledPin, LOW);                     // if the value of pulse from PIR sensor is LOW then LED will  not glow and buzzer
26    digitalWrite(buzzerPin, LOW);                  // will  not ring!
27    Serial.println("THERE IS NO MOTION IN FRONT OF SENSOR");
28  }
29}

1int sensorPin = 3; // connect PIR sensor to digital pin 3
2int ledPin
3  = 4;    // connect LED to digital pin 4
4int buzzerPin = 5; // connect buzzer
5  to digital pin 5
6
7void setup() {
8  Serial.begin(9600);
9  pinMode(sensorPin,
10  INPUT); 
11  pinMode(ledPin, OUTPUT);      // declare all pins as OUTPUT
12  pinMode(buzzerPin,
13  OUTPUT);  
14  
15
16  
17}
18
19void loop() {
20  
21  if(digitalRead(sensorPin)
22  == HIGH)   // if the value of pulse from PIR sensor is HIGH then LED will glow and
23  buzzer will ring
24  {
25    digitalWrite(ledPin, HIGH);
26    digitalWrite(buzzerPin,
27  HIGH);
28    Serial.println("THERE IS SOME MOTION IN FRONT OF SENSOR");
29  }
30
31  else                                 
32  {
33    digitalWrite(ledPin, LOW);
34                     // if the value of pulse from PIR sensor is LOW then LED will
35  not glow and buzzer
36    digitalWrite(buzzerPin, LOW);                  // will
37  not ring!
38    Serial.println("THERE IS NO MOTION IN FRONT OF SENSOR");
39
40  }
41}