DESIGN AND CONSTRUCTION OF AN ELECTRONIC ATTENDANCE STAFF REGISTER (EAR).

150%;font-family:" palatino="" linotype","serif""="">Abstract:

mso-bidi-font-size:12.0pt;line-height:150%;font-family:" palatino="" linotype","serif""="">The effect of science and technology had led to the development of computers and its application to various production fields. EAR is a new type of attendance software. It is aimed at eliminating the old method of keeping records of staff attendance on daily bases, through electronic means.

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150%;font-family:" palatino="" linotype","serif""="">TABLE OF CONTENTS:

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CHAPTER ONE

INTRODUCTION

line-height:150%;font-family:" palatino="" linotype","serif""="">1.1       LITERATURE REVIEW (INTRODUCTION)

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2       COMPONENTS REVIEW

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.1    INTEGRATED CIRCUIT (ICs).

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.1.1 : MICRO CONTROLLER (8952)

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.2    REGULATOR 7805

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.1.4 BUFFER 74244

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.1.5 THE 555 TIMER

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.2    ACTIVE COMPONENTS

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.2.1 TRANSISTOR

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.2.2 RECTIFIER DIODES

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.2.3 (LED) LIGHT EMITTING DIODES

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.2.4 CRYSTAL OSCILLATORS

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.3    PASSIVE DEVICES

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.3.1 RESISTORS

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.3.2 TRANSFORMER (STEP-DOWN)

line-height:150%;font-family:" palatino="" linotype","serif""="">1.2.3.3 SWITCHES (THE MICRO-SWITCH  (SOFT TOUCH/PUSH) BUTTON SWITCHES).

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CHAPTER TWO

DESIGN AND IMPLEMENTATION

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1     DESIGN OF THE 5 VOLT DC REGULATOR POWER SUPPLY MODULE

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.1   POWER SUPPLY MODULE

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.2   THE STEP-DOWN TRANSFORMER

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.3   RECTIFICATOIN PROCESS

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.4  GENERAL POWER CIRCUIT OPERATION

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.5    CALCULATION ON POWER MODULE

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.6    CALCULATION ON TRANSFORMER

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.7    CALCULATION ON RECTIFICATION

line-height:150%;font-family:" palatino="" linotype","serif""="">2.1.8    ANALYSIS AND CALCULATION ON FILTERING

line-height:150%;font-family:" palatino="" linotype","serif""="">2.2        DESIGN OF THE DISPLAY MODULE

line-height:150%;font-family:" palatino="" linotype","serif""="">2.3        MICRO-CONTROLLER MODULE

line-height:150%;font-family:" palatino="" linotype","serif""="">2.3.1    1/0 PORT PINS AND THEIR CONFIGURATIONS

line-height:150%;font-family:" palatino="" linotype","serif""="">2.3.2    GENERAL OF THE PULSES (IN SECONDS)

line-height:150%;font-family:" palatino="" linotype","serif""="">2.4       CONSTRUCTION

line-height:150%;font-family:" palatino="" linotype","serif""="">2.5       TESTING

line-height:150%;font-family:" palatino="" linotype","serif""="">2.6       COST LISTING

CHAPTER THREE

DISCUSSIONS AND CONCLUSIONS

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line-height:150%;font-family:" palatino="" linotype","serif""="">3.1       DISCUSSIONS

line-height:150%;font-family:" palatino="" linotype","serif""="">3.1.1    TROUBLE SHOOTING THE DESIGN

line-height:150%;font-family:" palatino="" linotype","serif""="">3.1.2    RESULT

line-height:150%;font-family:" palatino="" linotype","serif""="">3.1.2    PROBLEMS ENCOUNTERED

line-height:150%;font-family:" palatino="" linotype","serif""="">3.2       CONCLUSIONS

APPENDIX


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