The Design and Implementation of an Electronic Sign Pattern Display

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.

Block Diagram of a Dynamic Sign Display

Arrangement of the Pattern Display

Transformer Arrangement

Bridge Rectifier

Voltage and Current Waveforms

Full Diagrams of Power Supply

Four Bit Series in Parallel out Register Logic Circuit Arrangement

Clear and Shift Sequence

Circuit Diagram  for SR Ftip-Flop

Timing Diagram for SR Ftip-Flop Unclocked

B: Clocke Circuit

Transistor Switch/Relay Drive

Wave form of a Monostable, Fti-Flop

Astable Multivibrator

Internal Block Diagram of CMOS555 Timer

555CMOS Connection as a Multivibrator

555CMOS Connection as a Timer

555CMOS Connection as a Monostable Vibrator

Asynchroneous Decade Counter using Reset

Asynchroneous Decade Using Feedback

Timing Wave form

Pin configuration of Latch Counter

Circuit Diagrams of a Divided Counter

Complete Circuit Diagram of Electronics Sign Post

Complete Picture of Electronic Sign Post

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

Introduction

Literature review

Methodology

Power supply

Rectification

Filtration

Design of sequential Counter

Design of the transistor/Relay Drive

Design of system timing circuit

Design of an interated timing circuit

Astable multivbrator

Asignchronous counter

Synchronous counter

Construction and packaging

Packaging

Problem encountered and solutions