VISITOR COUNTER

Project Overview

In this project, we will create a visitor counter using two IR sensors and an Arduino. One IR sensor will be placed at the entrance to detect when a visitor enters, and the other IR sensor will be placed at the exit to detect when a visitor leaves. The visitor count will be displayed on the Serial Monitor.

Components

1. Arduino Uno

2. 2 x IR Sensors (with digital output)

3. I2C LCD

4. Jumper Wires

5. Breadboard

Circuit Diagram :

Steps to Build the Project :

Connect the IR Sensor to Arduino:

• Connect the VCC pin of the IR sensor to the 5V pin on the Arduino.

• Connect the GND pin of the IR sensor to the GND pin on the Arduino.

• Connect the output pin of the IR sensor to digital pin 2 & 3 on the Arduino.

Connect the LCD Display to Arduino:

• Connect the VCC pin of the I2C module on the LCD to the 5V pin on the Arduino.

• Connect the GND pin of the I2C module on the LCD to the GND pin on the Arduino.

• Connect the SDA pin of the I2C module on the LCD to the A4 pin on the Arduino.

• Connect the SCL pin of the I2C module on the LCD to the A5 pin on the Arduino.

Arduino Code :

#define IR_SENSOR_ENTRANCE 2

#define IR_SENSOR_EXIT 3

int visitorCount = 0;

void setup() {

pinMode(IR_SENSOR_ENTRANCE, INPUT);

pinMode(IR_SENSOR_EXIT, INPUT);

Serial.begin(9600); // Initialize serial communication

Serial.println("Visitor Counter Initialized");

}

void loop() {

if (digitalRead(IR_SENSOR_ENTRANCE) == LOW) {

visitorCount++;

Serial.print("Visitor Entered: ");

Serial.println(visitorCount);

delay(1000); // Debounce delay

}

if (digitalRead(IR_SENSOR_EXIT) == LOW) {

visitorCount--;

Serial.print("Visitor Exited: ");

Serial.println(visitorCount);

delay(1000); // Debounce delay

}

}

Code File

Testing the System :

• Connect the IR sensors as per the circuit diagram.

• Upload the code to the Arduino using the Arduino IDE.

• Open the Serial Monitor in the Arduino IDE.

• Set the Baud Rate in the Serial Monitor to 9600.

• Test the System:

  • Place an object (simulating a visitor) in front of the entrance IR sensor. The visitor count should increment.

  • Place the object in front of the exit IR sensor. The visitor count should decrement.

***Happy Tinkering***