Biometric Dual Mode Door Lock

ABSTRACT: The project aimed to develop a prototype for a digital locking system that integrates a manual cylinder lock mechanism with fingerprint recognition, enabling the door to be unlocked either via an authorized fingerprint or a key, with each method functioning independently. I designed an innovative mechanism incorporating sector gears, a cam, a spring, and a rack-and-pinion assembly to achieve seamless operation of the lock. The prototype was fabricated using 3D printing, and subsequent testing verified its functionality, demonstrating precise and reliable performance in both unlocking modes.