Visitor Counter

This Arduino project will automate the lights of the room and also count the person in the rooms 

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it also have self-intelligence that if there is no body in the room it will turn of the light
for example if 3 person enters the room then three person should exit also to turn the lights off

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  Material needed:-

• Arduino board
• 2 IR sensor 
  
• Jumper wire
• Chassis (optional) 

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Connect the IR sensor output on pin 14&19 (I am using Arduino Mega that's why I have connected  it to 14&19 you can change it as your needs in the program)

and the connect led or Relay module on pin 2 (you can change this also as per your need)

Then upload the code 

/* * This Code is For Visitor Counter * made by Diy-Areeb * http://bit.ly/diyareebyoutube */ #define in 7      //defining the in sensor #define out 6    //defining the out sensor #define led 13  //you can connect relay module also int count=0;   void setup() {  Serial.begin(9600);                    //start Serial moniter    Serial.println("Visitor Counter");    //print the title of te project  delay(2000);                         //as serial moniter starts    pinMode(in, INPUT);                 //describe the  pinMode(out, INPUT);               //pins  pinMode(led, OUTPUT);             //as OUTPUT or INPUT    Serial.print("Person In Room:");//it will first  Serial.println(count);         //print the 0 number of member } void loop() {      if(digitalRead(in))       //it works very  IN();                    //simply if anybody  if(digitalRead(out))    //enters the room it will +1  OUT();                 //and if anybody exit it -1  //if there is anybody is in the room  if(count<=0)           {    digitalWrite(led, LOW);//the led will light up        } //and if nobody in the room  else                            {      digitalWrite(led, HIGH);//led will be turned off  }   } void IN()  //Function for Adding person {    count++; //increase the number of people    Serial.print("Person In Room:");            //it will print    Serial.println(count);                     //+1 if a person enter in the room    delay(1000); } void OUT()//function for Decrease person {    count--;//decrease the number of people    Serial.print("Person In Room:");         //it will print    Serial.println(count);                   //-1 if a person exit out the room    delay(1000); }

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For more Watch this video