This project presents an Automatic Door Opening and Room Illumination Control System using IR and LDR sensors for smart and energy-efficient operation. The system is designed to automate door movement and control lighting intensity based on environmental conditions and human presence. An IR sensor is used to detect the presence of a person near the entrance. When a person is detected, the signal is sent to a PIC microcontroller, which controls a servo motor to automatically open the door. After a predefined time, the door closes automatically, ensuring convenience and security. An LDR (Light Dependent Resistor) is used to monitor ambient light intensity inside the room. Based on the surrounding light conditions, the microcontroller adjusts the brightness of high-power LEDs through a transistor driver circuit. If the room is dark, the lights turn ON or increase in intensity, and when sufficient light is available, the lights are dimmed or turned OFF, thus saving energy. The system also includes LED indicators to display operational status, along with a regulated power supply, crystal oscillator, and reset circuit for stable functioning. This project provides a smart, cost-effective solution for automation in homes, offices, and public spaces, enhancing comfort, security, and energy efficiency.          

Objective of the project:  

• To design an automatic door opening and closing system using an IR sensor
• To detect human presence and control the door using a servo motor
• To implement room illumination control using an LDR sensor
• To automatically adjust light intensity based on ambient light conditions
• To interface sensors with a PIC microcontroller for intelligent control
• To develop a transistor-based driver circuit for high-power LEDs
• To reduce human effort and improve convenience
• To achieve energy-efficient lighting control
• To develop a low-cost and reliable automation system.

          The major building blocks of this project are:

• Regulated Power Supply.
• PIC microcontroller.
• LDR.
• IR sensor.
• Transistor through High power LEDs.
• Servo motor for door
• Crystal oscillator.
• Reset Button.
• LED indicator.

        Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3.  Express SCH for Circuit design.

          Regulated Power Supply:

                 

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