Design And Construction Of Electronic Scrolling Message Display Board With Back Up Battery

ABSTRACT

This report is aimed at explaining the Design and Construction of electronic message display board. It enumerate why we need electronic scrolling message display which is primarily for passage of information across the staff, students and public. It also includes the aim and objectives, advantages and disadvantages with a well narrated literature review and timeline that relates to digital display and its current trends in digital world.

Adequate coverage was given to mode of operation, result and discussion on the project work including Conclusion, Recommendations for further study, Bill of Engineering Measurement and Evaluation (BEME) and Reference.

TABLE OF CONTENTS

Title Page…………………………………………………………………i

Certification…………………………………………………………….ii

Abstract…………………………………………………………………iii

Dedication……………………………………………………………..iv

Acknowledgements……………………………………………..…….v

Table of Content………………………………………………………..vi-ix

List of figures………………………………………………………….x-xi

CHAPTER ONE

• Introduction……………………………………………………….1
• Problem Statement ………………………………………….
• Motivation………………………………………………………….
• Aim……………………………………………………………………..
• Objectives……………………………………………………………
• Research Methodology…………………………………………….

CHAPTER TWO

2.0 Literature Review………………………………………………10

2.1 Traditional/Conventional Billboards……………………………….

2.2 Billboard Advertising………………………………………………

2.3 Digital Signals………………………………………….18-19

2.4 DIGITAL BILLBOARD

2.5     ELECTRONIC LED BILLBOARDS

CHAPTER THREE

3.0   System Design, Methodology and Circuit Analysis

3.1     System Design.

3.2  THE HARDWARE SECTION.

3.2.1  THE POWER SUPPLY UNIT.

3.2.1.1        LM7805 VOLTAGE REGULATOR.

3.2.2  THE INPUT UNIT.

3.2.2.1        MAX232.

3.2.2.2        RS-232.

3.2.3  THE CONTROL UNIT.

3.2.3.1        THE AT89C51 MICROCONTROLLER.

3.2.3.2.1     MEMORY ORGANIZATION

3.2.3.2.4     REGISTER BANKS.

3.2.4  DISPLAY UNIT.

3.2.4.1        LIGHT EMITTING DIODES (LEDS).

3.2.4.2        LED-Display-Unit-Module

3.3     DESIGN DATA AND CALCULATION.

3.4     SOFTWARE/FIRWARE DESIGN SECTION.

3.5              HOW THE ENTIRE SYSTEM SEND DATA INPUT INTO   MICROCONTROLLER.

3.6     HOW THE MICRO CONTROLLER WORK WITH THE ENTIRE SYSTEM

CHAPTER FOUR

4.0 System Implementation, Testing and Result.

4.1 System Implementation.

4.1.1 HARDWARE IMPLEMENTATION

4.1.2  SOFTWARE/FIRMWARE IMPLEMENTATION

4.2     TESTING

4.3     RESULT (THE PERFORMANCE ANALYSIS).

CHAPTER FIVE

5.0 Conclusion………………………………………………………….54

5.1 Recommendation………………………………………………….54

5.2 Bill of Engineering Measurement and Evaluation(BEME)…………………………………………………56

5.3 Reference………………………………………………………….57

Appendix………………………….. ……………………………………58-59

LIST OF FIGURES

Fig 2.1 Street lightning system………………………………………..13 Fig 2.2 Control switch…………………………………………………..14

Fig 2.3.1 Circuit diagram of dark activated relay switch……….15

Fig 2.3.2 Manual switch……………………………………………….16

Fig 2.7.1 Distribution board………………………………………….22

Fig 2.7.2 Circuit breaker………………………………………………22

Fig 3.1.1 (a) 4 Core by 6mm² cable…………………………………24

(b) Earth Leakage Circuit Breaker (ELCB)

(c) Streetlight fittings

(d) Electric pole……………………………………………24

Fig 3.1.2 (a) Plumb  …………………………………………………..25

(b) Measuring tape

(c) Shovel……………………………………………………25

Fig 3.1.3 (a) Iron frame and wooden base frame………………..26

(b) Round pipe

(c) Cement

(d) Sharp sand & Gravel………………………………..26

Fig 3.3.1  Choke……………………………………………………….29

Fig 3.3.2 Discharge lamp…………………………………………….30

Fig 3.3.3 Ignitor……………………………………………

          CHAPTER ONE

1.1     INTRODUCTION

Communication has become inevitable and vital thing in this present age, it is even believed to be a commodity meant for consumption by any targeted audience. One of the important qualities possessed by all animals is the ability to communicate with each other or one another at a given time.

An information display is a way of providing information and is used as an object for notification. It can be used for both indoor and outdoor which makes it universal fit for any form of alerts.

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 are display has been through the use of static mode of sign display such as banners, flyers etc, they are becoming boring and unattractive.

Electronic scrolling message display advertisements are designated to catch a people’s attention and create a memorable impression very quickly, leaving the reader thinking about the advertisement after they have driven past it. They have to be readable in a very short time because, they are usually read while being passed at high speeds.

This piece of digital 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, in schools it is used to display information related to the school programme and update news

1.2     MOTIVATION

The motivation of this project comes from the change involved with information in respect to time this days now prompt the huge step of constructing a reprogrammable SCROLLING MESSAGED DISPLAYER OR MOVING MESSAGE DISPLAYER to give information about anything at a particular moment to the targeted audience and need to know how electronic billboards can at least provide some improved measures to the limitations of conventional billboards listed in the problem statements. The astonishing and spectacular display of an electronic display is as well a source of inspiration.

1.3     AIM OF THE PROJECT.

To design and construct an outdoor-scrolling message display

1.4     OBJECTIVES OF THE PROJECT WORK

1. To design and construct an electronic display board with back-up battery which can be used to pass across information such as emergence phone contacts in form of scrolling message to staff, students and general public within the school premises.
2. To know the various electronic components that makes up an electronic billboard.

• To design and construct an electronic message displayer with backup battery that will serves as a link of communication within the school premises

1. To have practical knowledge on how these electronic components are interface and controlled to achieve the desired results.
2. To develop and implement how a microcontroller can be interface with a LED dot matrix display board
3. To have a good knowledge and understanding of the software/firmware needed to control the hardware section.

• To acquire more knowledge about digital world.