Automated microcontroller- based door lock with keypad and LCD

Date

10-2004

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Zaldy A. Andales

Abstract

A keypad, Liquid Crystal Display (LCD), and microcontroller-based door lock system was implemented using an Atmel ATMEGA16L microcontroller The study aims to design a low-cost and secure door lock using a unique password as a means of entry. The system utilizes the keypad for input from a user. It asks for a Personal Identification Number (PIN) code for a user to have access to a particular facility. An administrator account can add, edit, delete a user account, override the system, view the four recent log-ins, and set the date and time. The system employs a Futaba S3003 servo motor which drives a bolt for locking and unlocking the door. A stationary reed switch together with a magnet located at the door was used to detect whether the door is open or closed. The system can accommodate up to 66 user accounts excluding the administrator. In case of power failure, the system is equipped with a back-up power supply through a battery. The keypad and LCD system was later successfully integrated with a barcode scanner. Before a user can input his/her PIN using the keypad, he/she must first swipe his/her identification card through the barcode scanner. The combined keypad-barcode scanner system provides a dual security feature against unauthorized entry. The combined system was successfully tested for functionality on a miniature door. The system had a minimum power requirement of 7.5 Volts at 1.5 Amperes.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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