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ABSTRACT
LED's are a fantastic way to illuminate any kind of sign, be it lettering or panels. LED Dot-Matrix Displays are a common sight nowadays on streets, malls, buildings, parks and other public places. It is a way of visual information where large LCD and other display become too much expensive. Everything around us is becoming smart such as smart phones, smart televisions, smart refrigerators, so why not smart displays boards for advertisements and notices. Display boards are primary thing in any institute, organization, public utility places like bus stops, railway stations, parks, shopping malls to display information regarding platforms, various advertisements about the products, or important notices. People are now adapted to the idea of the world at its fingertips. The old -wired display boards are controlled by microcontroller. To change message, we need to change the microcontroller program code again and again. By adding Remote wireless communication interface, we can overcome these limitations. It is a start to the era of smart and real–time displaying of messages on display boards. This project explains the development of a Remote controller based Smart LED Display Boards
TABLE OF CONTENTS
Title page-Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â i
Approval page -Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â ii
Certification page-Â Â Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â iii
Dedication-Â Â Â Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â iv
Acknowledgement           -          -          -          -          -          -          -          -          -          v
Abstract -Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â vi
Table of contents  -          -          -          -          -          -          -          -          -          vii
CHAPTER ONE: INTRODUCTION
1.0Â Â Â Â Â Introduction-Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â 1
1.1     history of moving message board        -          -          -          -          -          2
1.2     Aim and Objectives of the Study          -          -          -          -           -        4
1.3    Significance of the Study -          -          -          -          -          -           -        5
1.4     Scope of the project         -        -           -          -          -          -           -        6
1.5    Definition of Terms           -          -          -          -          -          -          -          6
CHAPTER TWO: LITERATURE REVIEW
2.0     Introduction           -          -          -          -          -          -          -          -          9
2.1     Concept of Display            -          -          -          -          -          -          -          9
2.2Â Â Â Â Â Led -Â Â Â Â -Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 11
2.3     Application  -          -      -             -          -          -          -          -          -          12
2.4Â Â Â Â Â Advantages -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 13
2.5 Â Â Â Â Led Voltage Drop - -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 14
2.6     Leds in series -       -          -          -          -          -          -          -          -          14
2.7Â Â Â Â Â Leds in Parallel -Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 15
CHAPTER THREE: SYSTEM DESIGN
3.0   Introduction -          -          -          -          -          -          -          -          -          16
3.1     Power Supply         -          -          -          -          -          -          -          -          16
3.2Â Â Â Â Â System Requirement -Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 17
3.3    Microcontroller   -       -       -       -       -       -       -       -       17
3.4Â Â Â Â Â Remote Controller -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 18
3.5Â Â Â Power supply-Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 18
3.6Â Â System Requirement-Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 19
3.6.1Hardware Requirement    -          -          -          -          -          -          -          19
3.6.1.1Â Â Â Â Â Â Â Â Transformer-Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â 20
3.6.1.2Â Â Â Â Â Â Â Â Bridge Rectifier-Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â 20
3.6.1.3Â Â Â Â Â Â Â Â Regulator IC-Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â 20
3.6.1.4Â Â Â Â Â Â Â Â Power Transistor-Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â 21
3.6.1.5        20MHz Crystal oscillator- -       -       -       -       -       -       21
3.6.1.6Â Â Â Â Â Â Â Â Resistor-Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â -Â Â Â Â Â Â Â 21
3.6.2Â Software Requirement-Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 22
3.7Â Â Â Â Â Tools- -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 22
3.8Â Â Â Â Â Testing a LED-Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 24
3.9Â Â Â Â Â Connecting a LED - -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 24
3.10  Soldering LEDs        -        -          -          -          -          -          -          -          25
CHAPTER FOUR: SYSTEM IMPLEMENTATION
4.0     Introduction           -          -          -          -          -          -          -          -          26
4.1Â Â Â Â Â Ceiling Board -Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 26
4.2Â Â Â Â Â PCB-Printed circuit Board -Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 26
4.3Â Â Â Â Â PIC16F628A Microcontroller -Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 26
4.4Â Â Â Â Â Program Memory Organization -Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 30
4.5Â Â Â Â Â CD4017 Decade Counter -Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 30
4.6Â Â Â Â Â UNC5821A Shift Register (Serial in/Serial out)Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â -Â Â Â Â Â Â Â Â Â Â 32
4.7   Remote Controller Interface        -          -          -          -          -          -          34
4.8   Principles of Operations   -       &nb
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