Development of a Microcontroller-Based Smart Front DoorLock System

The paper aims to develop a cost-effective home security system using the PIC16F877A microcontroller. The proposed system controls the door's lock mechanism through a range of components, including a keypad, LCD, infrared sensor, buzzer, stepper motor, and relays. The system prompts the user for a passcode via the keypad, granting access only upon successful authentication. Additionally, an infrared sensor monitors the door's status, promptly triggering an alarm upon detecting unauthorized access and an LDR sensor to activate the porch light under low light conditions. The research underscores the potential of the PIC16F877A for innovative and cost-effective home security solutions.