Visitor Counter

Components

Arduino UNO

Resisters

IR Sensor module

16x2 LCD display

Bread Board

Connecting Wires

Circuit Diagram :-

CODE :-

//PRATEEK //www.prateeks.in #include<LiquidCrystal.h> LiquidCrystal lcd(13,12,11,10,9,8); #define in A0 #define out A5 //#define relay 2 int count=0; void IN() { count++; lcd.clear(); lcd.print("Person In Room:"); lcd.setCursor(0,1); lcd.print(count); delay(1000); } void OUT() { count--; lcd.clear(); lcd.print("Person In Room:"); lcd.setCursor(0,1); lcd.print(count); delay(1000); } void setup() { lcd.begin(16,2); lcd.print("Visitor Counter"); delay(2000); pinMode(in, INPUT); pinMode(out, INPUT); pinMode(relay, OUTPUT); lcd.clear(); lcd.print("Person In Room:"); lcd.setCursor(0,1); lcd.print(count); } void loop() { if(digitalRead(in)) IN(); if(digitalRead(out)) OUT(); if(count<=0) { lcd.clear(); digitalWrite(relay, LOW); lcd.clear(); lcd.print("Nobody In Room"); lcd.setCursor(0,1); lcd.print("Light Is Off"); delay(200); } else digitalWrite(relay, HIGH); }