DESIGN AND CONSTRUCTION OF A COMPUTER BASED CONTROL OF ELECTRICAL APPLIANCES

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INTRODUCTION

This project presents the design and construction of a computer based program used to control office appliance. It is based on a Graphic user interface (GUI) programming language (Visual Basic 6.0), Parallel Port Interactive Mode, Opto-Coupler Isolation of the computer from the appliance to prevent damage to the system should a fault develop in the appliance. The implementation was based on the interaction of the computer with electronic appliance via the 25 Pin Centronics Parallel Port Cable.

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TABLE OF CONTENT

line-height:115%;font-family:" verdana","sans-serif""="">Title Page - - - - - - - - - - i

line-height:115%;font-family:" verdana","sans-serif""="">Dedication - - - - - - - - - ii

line-height:115%;font-family:" verdana","sans-serif""="">Acknowledgement - - - - - - - - iii

line-height:115%;font-family:" verdana","sans-serif""="">Abstract - - - - - - - - - - iv

line-height:115%;font-family:" verdana","sans-serif""="">List of Figures - - - - - - - - - v

line-height:115%;font-family:" verdana","sans-serif""="">List of Table - - - - - - - - - vi

line-height:115%;font-family:" verdana","sans-serif""="">Table of Content - - - - - - - - vii

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normal">CHAPTER ONE

normal">INTRODUCTION

line-height:115%;font-family:" verdana","sans-serif""="">1.2 Objective of the Project - - - - - - 1

line-height:115%;font-family:" verdana","sans-serif""="">1.3
1"> Justification of the Project - - - - - 2

line-height:115%;font-family:" verdana","sans-serif""="">1.4
1"> The Scope of the Project - - - - - - 2

line-height:115%;font-family:" verdana","sans-serif""="">1.5
1"> Project Report Organization - - - - - 3

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normal">CHAPTER TWO

normal">REVIEW OF RELATED LITERATURE

line-height:115%;font-family:" verdana","sans-serif""="">2.3.1 The Hardware - - - - - - - - 4

line-height:115%;font-family:" verdana","sans-serif""="">2.3.2 The Software - - - - - - - - 7

line-height:115%;font-family:" verdana","sans-serif""="">2.3.3 Parallel Port Basics
1"> - - - - - - - 15

line-height:115%;font-family:" verdana","sans-serif""="">2.4 Opto-Electronic Component - - - - - 28

line-height:115%;font-family:" verdana","sans-serif""="">2.5
1"> The Relay - - - - - - - - - 34

normal">CHAPTER THREE
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normal">METHODOLOGY

line-height:115%;font-family:" verdana","sans-serif""="">3.1
1"> Design Approach - - - - - - - 37

line-height:115%;font-family:" verdana","sans-serif""="">3.2
1"> Software Development - - - - - - 37

line-height:115%;font-family:" verdana","sans-serif""="">3.2.1 Out Putting Data to the Parallel Port -
1"> - - 38

line-height:115%;font-family:" verdana","sans-serif""="">3.2.2 Reading Data from the Parallel Port - - - 40

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normal">CHAPTER FOUR

normal">ANALYSIS AND DESIGN

normal">CHAPTER FIVE

normal">SYSTEM IMPLEMENTATION AND TESTING

line-height:115%;font-family:" verdana","sans-serif""="">5.1
1"> Functional Test - - - - - - - - 51

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normal">CHAPTER SIX

normal"> CONCLUSION AND RECOMMENDATION

line-height:115%;font-family:" verdana","sans-serif""="">5.1
1"> Conclusion - - - - - - &a

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DESIGN AND CONSTRUCTION OF A COMPUTER BASED CONTROL OF ELECTRICAL APPLIANCES

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