TITLE:
Design and Construction of a Microcontroller Based Electronic Moving Message Display
AUTHORS:
Titus Taofk Ogunseye, Godwin Babatunde Egbeyale, Adekunle K. Bello, Adegbenro S. Ajani
KEYWORDS:
Microcontroller, LEDs, Transistor, Relays, Transformer, Diodes
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.12 No.4,
April
12,
2022
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 microcontroller-based
electronic moving message display system. The design involves the arrangement
of Light Emitting Diodes (LEDs) and the programming of a microcontroller that
controls and determines the pattern and session of the display. The
implementation of a moving message displays a text containing 22 characters (i.e. WELCOME TO DEPT. OF PHYSICS). The
electronic message display helps to pass information, educates, enlightens,
facilitates commercial activities through the advertisement and marketing of goods and services, 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 information 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.