Microcontroller-Based Alarm System

This project is a security alarm system powered by a PIC16F877A microcontroller. The push button acts as a trigger or a security sensor (such as a door contact or a panic button). When the button is pressed, it sends an interrupt signal to the microcontroller to immediately trigger an alert state. The system then turns on the red LED as a visual warning and updates the 16x2 LCD to display an alert message (e.g., "ALARM ON" or "Intruder Detected"). Additionally, the Buzzer (from your device list) can be connected to provide an audible siren.