Fire alarm application based on PIN Diode

Abstract

Fire accidents cause significant loss of life and property every year. Traditional fire detection systems are often expensive, complex, or lack sensitivity. This project presents a low-cost, efficient fire detection system using a PIN photodiode that detects the infrared (IR) radiation emitted by flames. The system includes a comparator circuit and a transistor switch to trigger a buzzer alarm when fire is detected. The design is simple, economical, and effective for early fire detection in residential and small industrial settings. It offers a scalable solution for real-time fire monitoring and can be enhanced with IoT capabilities for future applications.