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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