Arduino-Based Password-Protected Automatic Door Lock System

Developed a password-protected smart door-lock prototype using Arduino Uno, 4×3 keypad, 16×2 LCD, servo motor, and 9V battery supply. Programmed a 4-digit authentication system where the servo motor controls the lock position from 0° to 90° after correct password entry. Implemented automatic door-closing logic with LCD-based status display for “Door Open,” “Door Closed,” and “Wrong Password” conditions.

Detailed technical documentation, implementation strategies, and outcome analysis for this project are currently being compiled. This section will be updated with comprehensive insights into the methodologies, challenges overcome, and the ultimate impact of the developed solution.