Automatic Room Light Controller with Bidirectional Visitor Counter

Automatic Room Light Controller with Bidirectional Visitor Counter

The Automatic Room Light Controller with Bidirectional Visitor Counter is an intelligent embedded system designed to improve energy efficiency and automation. It uses infrared (IR) sensors to detect and count people entering and exiting a room. When a person enters, the system turns on the light automatically. Likewise, when the last person leaves, the system turns the light off.

This project solves two common problems: energy wastage and the need for manual light switching. Moreover, it helps in monitoring room occupancy, which is essential in avoiding overcrowding. The system tracks people in both directions and updates the count accordingly. Since the microcontroller manages everything in real time, it ensures smooth and accurate operation.

With the growing demand for smarter solutions in homes and buildings, this setup offers an affordable and efficient alternative. It not only improves convenience but also helps save electricity. As a result, the system becomes ideal for both residential and commercial environments.

In today’s world, where automation is transforming daily life, this project stands out. It combines simplicity with functionality and offers an excellent opportunity for learning embedded systems and IoT basics.

Hardware Used

The following components are used to implement this system:

• IR Sensor Modules: Detect the presence and direction of people entering/exiting

• Microcontroller (Arduino UNO / ATmega328): Controls logic and counting

• Relay Module or Transistor Circuit: Controls the room light based on people count

• Light Bulb / LED Lamp: Represents the actual room light

• 7-Segment Display or LCD: Displays the current count of people

• Power Supply (5V/12V): Powers the sensors and controller

• Jumper Wires, Breadboard or PCB: For assembling the complete circuit

Applications

This system is useful in places where automated lighting and occupancy management are beneficial:

• Residential homes

• Classrooms and lecture halls

• Conference rooms

• Libraries

• Hospitals and waiting areas

• Office cabins

• Laboratories and server rooms

Key Features

• Automatic Light ON/OFF: Lights turn ON when someone enters and OFF when no one is left inside

• Bidirectional Visitor Counter: Accurately counts people entering and exiting

• Energy Efficient: Prevents unnecessary power consumption

• Compact and Low-Cost Design: Easy to install and build

• Overcrowding Management: Helps track room capacity in real-time

• Hands-Free Operation: Fully automatic and hygienic—no switches needed

• Scalable: Can be extended to multiple entry/exit points

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For more information:-www.mifraelectronics.com 
* Product Images are shown for illustrative purposes only and may differ from actual product.