Construction of a Digital Display Board

ABSTRACT

Electronic Digital message display Board is an electronic gadget that is capable of displaying length of alphanumeric characters, symbols and any form of representation on a matrix of light emitting diodes (LED) scrolling the characters across the screen for information disemination. This project set out to solve the problem of inadequate clarity, objectiveness and degree of comprehension inherent in paper bill boards. Also, response to the information is further enhanced when the medium employed is attractive and highly inviting, as the case is for a moving display. The design and construction of the electronic digital display board consist of some units that make up the whole hardware. Among the unit are: Input unit, Controller unit, Display unit and power supply unit as well as the decoder unit. There are some basic electronic components that were used during the construction, These involves the following: PIC16F877A microcontroller, resistors, capacitors, voltage regulator, crystal oscillator, LEDs, transformer, relays, bridge rectifier, and transistors. The drivers unit consists of NPN transistors and 1k resistors thereby, serving as drivers that drive the data which has been transformed to different patterns of  display from the data bus of the chips to the display unit (LED). The project here was tested at various stages to ascertain its workability.

TABLE OF CONTENT

Title Page ............................................................................................................i

Certification ........................................................................................................ii

Approval page ....................................................................................................iii

Dedication ...........................................................................................................iv

Acknowledgement ..............................................................................................v

Abstract ..............................................................................................................vi

Table of Content ...............................................................................................vii

Table of figure ..................................................................................................viii

List of table .........................................................................................................ix

CHAPTER ONE: INTRODUCTION

(1.1)      Background of the project .......................................................................(1)

(1.2)      Aim and Objectives of the study .............................................................(2)

(1.3)       Significance of the study ........................................................................(3)

(1.4)       Scope of the study ..................................................................................(3)

(1.5)      Limitation of the project .........................................................................(3)

CHAPTER TWO: LITERATURE REVIEW

(2.1) History Developnment of Electronic Display Boards ..............................(4)

(2.2) Digital Signal ............................................................................................(5)

(2.3) Digital Display ..........................................................................................(7)

(2.4) An LED Display .......................................................................................(8)

(2.5) Electronic Information Board ...................................................................(8)

(2.6) BCD System ...........................................................................................(11)

(2.7) A Display Device ...................................................................................(12)

(2.8) Technology of Electronics Display ........................................................(12)

 

CHAPTER THREE: METHODOLOGY AND SYSTEM DESIGN ANALYSIS

(3.1) Methodology ...........................................................................................(19)

(3.1.1) System Analysis And Design ..............................................................(21)

(3.1.2) LED .....................................................................................................(25)

(3.2) Display Board .........................................................................................(34)

(3.3) Hardware Connection ............................................................................(36)

CHAPTER FOUR: SYSTEM IMPLEMENTATION, TESTING AND EVALUATION

(4.1) Implementation of The System ..............................................................(43)

(4.1.1) Unit Testing ........................................................................................(43)

(4.2) Programming The Controller Board Using The Power LED Software .(47)

(4.3) Transmitting Information To The Display Board Wirelessly Through The Power LED Pro Application ..........................................................................(50)

(4.4) Packaging .............................................................................................(52)

CHAPTER FIVE CONCLUSION AND RECOMMENDATION

(5.1) Conclusion ............................................................................................(56)

(5.2) Recommendation ...................................................................................(57)

REFERENCE ................................................................................................(59)