Social Distancing Project using Arduino Uno & PIR Sensor

1int ledPin = 5;                            //LED PIN.
2int buzzerPin  = 6;                          //BUZZER INPUT PIN.
3int pirPin = 7;                            //MOTION  SENSOR INPUT PIN.
4int sensorValue = LOW;                      //DEFAULT SENSOR  STATE.
5
6void setup() {                              //INITIAL SETTINGS/ASSIGNMETN.
7  pinMode(buzzerPin, OUTPUT);               //SET BUZZER AS OUTPUT.
8  pinMode(ledPin,  OUTPUT);                  //SET LED AS OUTPUT.
9  pinMode(pirPin, INPUT);                   //SET  PIR AS INPUT.
10}
11void loop() {                               //COMMAND TO BE  REPEATED.
12  sensorValue = digitalRead(pirPin);        //READ PIR INPUT PIN.
13  if ( sensorValue == HIGH) {               //IF MOTION IS DETECTED.
14    tone(buzzerPin,  1200);                  //BUZZ THE BUZZER. 
15    digitalWrite(ledPin, HIGH);             //ON  LED.
16    delay(100);                             //TIME DIFFERENCE BETWEEN HIGH(ON)&  LOW(OFF).                      .
17    digitalWrite(ledPin, LOW);              //OFF  LED.
18    delay(100);                             //TIME DIFFERENCE BETWEEN HIGH(ON)&  LOW(OFF).
19  }
20  else {                                    //IF NO MOTION IS  DETECTED.
21    noTone(buzzerPin);                      //SILENT THE BUZZER.
22    digitalWrite(ledPin, LOW);              //OFF LED.
23  }
24}
25

1int ledPin = 5;                            //LED PIN.
2int buzzerPin   = 6;                          //BUZZER INPUT PIN.
3int pirPin = 7;                            //MOTION   SENSOR INPUT PIN.
4int sensorValue = LOW;                      //DEFAULT SENSOR   STATE.
5
6void setup() {                              //INITIAL SETTINGS/ASSIGNMETN.
7   pinMode(buzzerPin, OUTPUT);               //SET BUZZER AS OUTPUT.
8  pinMode(ledPin,   OUTPUT);                  //SET LED AS OUTPUT.
9  pinMode(pirPin, INPUT);                   //SET   PIR AS INPUT.
10}
11void loop() {                               //COMMAND TO BE   REPEATED.
12  sensorValue = digitalRead(pirPin);        //READ PIR INPUT PIN.
13   if ( sensorValue == HIGH) {               //IF MOTION IS DETECTED.
14    tone(buzzerPin,   1200);                  //BUZZ THE BUZZER. 
15    digitalWrite(ledPin, HIGH);             //ON   LED.
16    delay(100);                             //TIME DIFFERENCE BETWEEN HIGH(ON)&   LOW(OFF).                      .
17    digitalWrite(ledPin, LOW);              //OFF   LED.
18    delay(100);                             //TIME DIFFERENCE BETWEEN HIGH(ON)&   LOW(OFF).
19  }
20  else {                                    //IF NO MOTION IS   DETECTED.
21    noTone(buzzerPin);                      //SILENT THE BUZZER.
22     digitalWrite(ledPin, LOW);              //OFF LED.
23  }
24}
25