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THE DESIGN AND IMPLEMENTATION OF AN ELECTRONIC SIGN PATTERN DISPLAY

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ABSTRACT
This design implementation of this electronic sequential sign post display employs the use of some specialized components. This section of the project introduces the reader to the different section of the project and the components that makes them up.
Emphasis are laid on describing the behaviour and operational system of the components as related to the project modeling, analysis, design and implementation of an ELECTRONIC SIGN POST, which is made up of a power supply, a shift register, a counter, multivibrator (555CMOSI.C) transistor, relay, resistors of different ohmic values capacitors, sensitive mic (for the switching system) and 220V AC lamp.
LIST OF FIGURES
Fig. 3.1: Block Diagram of a Dynamic Sign Display 
Fig. 3.2: Arrangement of the Pattern Display 
Fig. 4.1: Transformer Arrangement 
Fig. 4.2: Bridge Rectifier 
Fig. 4.3: Voltage and Current Waveforms
Fig. 4.4: Full Diagrams of Power Supply 
Fig. 5.1: Four Bit Series in Parallel out Register Logic Circuit Arrangement
Fig. 5.2: Clear and Shift Sequence
Fig. 5.3: Circuit Diagram  for SR Ftip-Flop 
Fig. 5.4: Timing Diagram for SR Ftip-Flop Unclocked
Fig. 4.4.B: Clocke Circuit
Fig. 6.1: Transistor Switch/Relay Drive
Fig. 6.2: Wave form of a Monostable, Fti-Flop
Fig. 7.1: Astable Multivibrator 
Fig. 7.2: Internal Block Diagram of CMOS555 Timer
Fig. 7.3: 555CMOS Connection as a Multivibrator 
Fig. 7.4: 555CMOS Connection as a Timer
Fig. 7.5: 555CMOS Connection as a Monostable Vibrator 
Fig. 8.1: Asynchroneous Decade Counter using Reset 
Fig. 8.2: Asynchroneous Decade Using Feedback
Fig. 8.3: Timing Wave form
Fig. 8.4: Pin configuration of Latch Counter
Fig. 8.5: Circuit Diagrams of a Divided Counter 
Fig. 8.6: Complete Circuit Diagram of Electronics Sign Post
Fig. 8.7: Complete Picture of Electronic Sign Post  
TABLE OF CONTENTS
Title Page 
Declaration 
Approval Page
Dedication 
Acknowledgements
List of Table 
List of Figure 
Table of Contents 
Abstract 
Description/Functions of Components Used with 
List of Figures
CHAPTER ONE 
Introduction 
CHAPTER TWO 
Literature review
CHAPTER THREE
Methodology 
CHAPTER FOUR 
Power supply
Rectification 
Filtration 
CHAPTER FIVE 
Design of sequential Counter 
CHAPTER SIX 
Design of the transistor/Relay Drive 
CHAPTER SEVEN 
Design of system timing circuit 
Design of an interated timing circuit 
Astable multivbrator 
Asignchronous counter 
Synchronous counter
CHAPTER EIGHT 
Construction and packaging 
Packaging 
Problem encountered and solutions 
References 

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