ABSTRACT
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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.
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LIST OF FIGURES
Fig. 3.1: Block Diagram of a Dynamic Sign DisplayĀ
Fig. 3.2: Arrangement of the Pattern DisplayĀ
Fig. 4.1: Transformer ArrangementĀ
Fig. 4.2: Bridge RectifierĀ
Fig. 4.3: Voltage and Current Waveforms
Fig. 4.4: Full Diagrams of Power SupplyĀ
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 Ā for SR Ftip-FlopĀ
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 MultivibratorĀ
Fig. 7.2: Internal Block Diagram of CMOS555 Timer
Fig. 7.3: 555CMOS Connection as a MultivibratorĀ
Fig. 7.4: 555CMOS Connection as a Timer
Fig. 7.5: 555CMOS Connection as a Monostable VibratorĀ
Fig. 8.1: Asynchroneous Decade Counter using ResetĀ
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 CounterĀ
Fig. 8.6: Complete Circuit Diagram of Electronics Sign Post
Fig. 8.7: Complete Picture of Electronic Sign Post Ā
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TABLE OF CONTENTS
Title PageĀ
DeclarationĀ
Approval Page
DedicationĀ
Acknowledgements
List of TableĀ
List of FigureĀ
Table of ContentsĀ
AbstractĀ
Description/Functions of Components Used withĀ
List of Figures
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CHAPTER ONEĀ
IntroductionĀ
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CHAPTER TWOĀ
Literature review
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CHAPTER THREE
MethodologyĀ
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CHAPTER FOURĀ
Power supply
RectificationĀ
FiltrationĀ
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CHAPTER FIVEĀ
Design of sequential CounterĀ
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CHAPTER SIXĀ
Design of the transistor/Relay DriveĀ
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CHAPTER SEVENĀ
Design of system timing circuitĀ
Design of an interated timing circuitĀ
Astable multivbratorĀ
Asignchronous counterĀ
Synchronous counter
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CHAPTER EIGHTĀ
Construction and packagingĀ
PackagingĀ
Problem encountered and solutionsĀ
ReferencesĀ
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