Design and development of a micro-controller-based electronic moving message display board / by Michelle L. Baylon andMichelline E. Tamio.

Design Project (BS Computer Engineering) Cavite State University.

Includes bibliographical references.

College of Engineering and Information Technology (CEIT)

BAYLON, MICHELLE L. AND MICHELLINE E. TAMIO. Design and Development of a Microcontroller-Based Electronic Moving Message Display Board. Undergraduate Design Project. Bachelor of Science in Computer Engineering. Cavite State University, Indang Cavite. April 2006. Adviser: Mr. Bienvenido C. Sarmiento Jr.
The "Design and Development of a Microcontroller-Based Electronic Moving Message Display Board" was conducted at Tanza, Cavite. The general objective of the study was to design, develop and construct a functional Microcontroller-Based Electronic Moving Message Display Board. Four main parts composed the system: the control unit, the display unit, the input unit and the power supply. The microcontroller and the non-volatile static random-access memory (NVSRAM) with real time clock (RTC) composed the control unit while ten 3"x2" seven-segment LED display for the time and date display and twenty-four 5x7 dot-matrix display for the scrolling messages. Furthermore, the input unit was primarily composed of the keypad capable of entering alpha-numeric data into the system's microprocessor. The message board could display the fixed message "Welcome to Department of Computer and Electronics Engineering" followed by the pre-encoded messages if they were set to be displayed on the current date. The system could hold 5 different messages with a maximum number of 80 characters for each message. The first four message storage displayed its content if the first four characters match the month-day combination of the displayed current date. In such cases, the bell dings and the backlight lights up simultaneously, the backlight highlighting the word "Announcement" until the entire message was displayed. The light goes off concurrently with the second ding of the bell. The fifth message is editable and is displayed even without date declaration, but the backlight and bell were inactive. It preceded the fixed message and/or the pre-encoded message(s) and displayed the message: "ACADEMIC PROGRAMS: BSCoE, BSECE, BSEE, Certificate in Computer Technician". The scrolling messages scrolled from right to left and are displayed continuously. Assembly language was used in developing the system software. The PIC 16F877 was programmed to control the operation of the whole system. The program was composed of subroutines that perform different operations. The project was introduced to the proponents' adviser and technical critic during the preliminary evaluation conducted at the Ladies Dormitory Bldg. 2, on February 23, 2006. It was done by presenting the actual machine. The final evaluation of the design took place at the New Engineering Building of Cavite State University on February 27, 2006. The whole system underwent a series of testing and evaluation to ensure its accuracy and effectiveness. Suggestions from some of the DCEE faculty were entertained such as changing the duration that the backlight is on. Instead of 5 seconds, the light should go off after the entire pre-encoded message had been displayed. The performance of the system was favorable based on the proponents' main objective. The electronic message board successfully displayed the time, date, and the messages. The evaluation gained positive results. The project was examined and found satisfactory.

05/04/2006 DP-186 Submitted to the University Library