Project Abstract

<p> <b>Abstract
</b></p><p>&nbsp;A sequential digital display is an electronic system that is used to display information to the public. It is a device that contains light emitting diodes that conveys messages by a programmable controller or mechanical processes, regardless of size. Sequential digital display is fast gaining acceptance and application in different spheres of life. In this work, a sequential digital display system was designed and implemented. The components used include transformer, diodes, voltage regulator, resistors (fixed and variable types), capacitors, NE 555 timer, IC4017, IC7432, light emitting diodes and transistors. The aim of the project was to carry out a cost effective design, therefore, the components of the design were readily available and relatively cheap. The light emitting diodes displayed a message written as Welcome to NOUN Ado-Ekiti study center. The project was tested and commissioned and found to meet specified design requirements Keywords—Integrated Circuit, Light Emitting Diodes, Sequential Digital Display, Transistor <br></p>

Project Overview

<p> INTRODUCTION</p><p>&nbsp;In this modern time, solid state materials have helped man to show that he really exists by doing wonders in the world of electronics. One major development, made possible by the enormous advances in solid state technology, is the “digital revolution”. Circuits are designed to implement the basic digital logic functions fundamental to all digital systems. Digital electronics therefore compasses the design, manufacture, and use of circuits for processing information in digital form [1]. Since the early 1990s schools have been on the frontline of the Information Communication Technology (ICT) revolution. The extent of development in information dissemination has made it possible that the well known method of displaying information using sign posts, placards, notice boards, etc has to be modified by using electronic information board. In the previous years, the means by which adverts, information, etc., are made has been through the method of the digital display board. But the use of static mode of sign display such as banners, flyers etc are becoming boring and unattractive. The new technologies of the digital age have made possible the use of programmable and reprogrammable electronics display to provide solutions to this kind of problem. This piece of technology can be found in a number of places and are being used for different purposes. In banks, it is used to display interest rates as well as exchange rates. In hotels and pubs, it is used to display the menu and prices. Actually there are different areas of application of this project, numerous to mention [2]. A dot matrix display is an array of light emitting diodes (LEDs) arranged in a 7 X 7 matrix that is used to display a programmed data/information. <br></p>