Design and Construction of a Microcontroller Based Electronic Moving Message Display
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
.scirp.org/journal/ojapps
Abstract
LED-based moving-message displays are becoming appreciated among the
general public for transmitting information to groups of people quickly. This
work presents a simple design and implementation of a microcontrol ler-based electronic moving message display system. The design involves the
arrangement of Light Emitting Diodes (LEDs) and the programming of a mi crocontroller that controls and determines the pattern and session of the dis play. The implementation of a moving message displays a text containing 22
characters (i.e. WELCOME TO DEPT. OF PHYSICS). The electronic mes sage display helps to pass information, educates, enlightens, facilitates com mercial activities through the advertisement and marketing of goods and ser vices, description of places, etc. The ease in which it displays information
makes it a veritable, suitable, and excellent tool for passing information fast
and pleasurable to the public. Furthermore, it enhances the response to in formation in an attractive way and manner in which it displays messages. The
microcontroller used in this work is the PIC16F84A. It belongs to a class of
8-bit microcontrollers of RISC (reduced instructions set) architecture. Its
output controls the switching of the relays through a transistor switching
stage that switches its socket. The LED matrix (array) is arranged in parallel
and soldered to a Vero board with the microcontroller and other electronic
components, such as resistors, capacitors, transistors, relays, LEDs, diodes,
and transformers. In view, this work served as a means of digging into the
technology involved in the use of a microcontroller and some other basic
electronic components and enhanced visualization of message display.