DESIGN AND CONSTRUCTION OF AN ELECTRIC DICE
DISPLAY WITH AUDIO UNIT.

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ABSTRACT
This work deals extensively with the design and construction of an electro-dice display (EOD) with audio unit. The device displays the value of a ludo dice in numerical form and also produces sound as it displays the number.

The device works with principle of chance employed by ludo game players. The output of the display is usually very rapid that the player does not actually see the number when the device is switched ON so that it will purely be a game of chance. When the off key is pressed, a particular number is displayed and this number is the number the player got.

The operation of the device starts by the generation of a pulse frequency. The pulse frequency (square wave signal) is generated by times (555 timer) by connecting in unstable multi-vibrator. The output from the timer is used in clocking the binary counter (mode 10 counter) but this counter is biased in the mode 10 counter, the output from Qo, Q1 and Q2 were connected to the reset pins so that once the counter finishes the count of six of goes back to zero.

The result from the binary counter is then fed to the decoder / driver before connecting it to seven segment so that the decoder will be able to convert the binary values to the decimal values that are being used in the ludo game dice. The seven segment then displays the numbers by lightening the diodes that make up that particular.

This device is being regulated by a latch (4-edge triggered flip-flop which has two switches, one is used for putting the power supply and the other two push switches for the working of the dice display.

ORGANISATION OF WORK
The organisation of this work is in seven chapters, the first on the introduction; the second is on the literature review; the third is on the design of the system; the fourth deals with the construction (implementation); sixth is on packaging and the seventh on the recommendation and conclusion.

The first chapter: Introduction gives general view of what the electronic dice displays (EDD) with audio unit aims and objectives, scope, limitations, problems and purpose of the study.

The Second Chapter: Literature Review explains the different components that make up the system, their make up and how they operate.

The third deals on the design of the system, describes vividly each component of the system, their operating modes, specifications and applications, schematic diagram of the system showing independence modules which function together to make up the system.

Construction, the fourth chapter deals with the actual construction of the system, the design requirement, theory of the functioning of each module system, breakdown of the module specification and construction. Calculations and careful selection of the component values of each modules are detailed in this chapter.

The fifth chapter which is on the documentation deals on the general description of the work, provides ease of maintenance and wage of the system.

Packaging, the sixth chapter lists the factors that were taken into consideration in the design and construction of the package.

The seventh and the last chapter, recommendations and conclusion gives a general view of what is covered and the importance of this device. It also suggested certain areas for further studies.

LIST OF TABLES
Table 3.1 Trueth table for sk flip flop
Table 3.2 Delay flip flop from SR flip flop
Table 3.4 AND logic gate truth table
Table 3.5 Table of counter output in various forms.
Table 3.7 BCD to seven segment decoder truth table.
Table 4.1a BCD count sequence
Table 5.0 Procedure Chart
Table 5.1 System Flowchart
Table 6.0 Program Design
Table 6.1 Program Flowchart

TABLE OF CONTENTS
Cover page
Title page
Approval page
Dedication
Acknowledgement
Abstract
Organization of work
List of figures
List of table

CHAPTER ONE
INTORDUCTION
1.0 Statement of problem
1.1 Purpose of study
1.2 Aim and objectives
1.3 Scope of the study
1.4 Limitations of the study
1.5 Definitions of terms.

CHAPTER TWO
LITERATURE REVIEW

CHAPTER THREE
DESCRIPTION AND ANALYSIS OF THE EXISTING SYSTEM FACT FINDING METHODS
Organization structure
Objectives of the existing system

CHAPTER FOUR

DESIGN OF THE NEW SYSTEM
Output specification and design
Input specification and design
File design.
Procedure chart
System flow chart
System Requirement.

CHAPTER FIVE
IMPLEMENTATION
Program Design
Program Flowchart
Pseudcodes

CHAPTER SIX
DOCUMENTATION

CHAPTER SEVEN
RECOMMENDATION
CONCLUSION

REFERENCE

CHAPTER ONE
INTRODUCTION
Instrumentation engineering has advanced widely with the introduction of medium scale integration (MIS), large scale Integration (LSI) and very large scale Integration (VLSI). For the purpose of accuracy and reliability analogue instruments are being replaced by the digital ones. The electronic dice display (EDD) with audio unit is among this now bread of instruments.

1.0 STATEMENT OF PROBLEM.
The design of an electronic dice display is invented because of the quest fort reducing strenuous activities encountered by man, especially on the area of its recreational activities. This device is used in ludo game. The ludo game on its manual operation, as he manipulated by the experts so that it can no longer be a game of chance. Sometimes players can employ tricks on their opponents which playing the game, for example if the both players are not vigilant, one of the them can event thwart the dice and claimed that nothing happened. The players too may get tired after playing two or three times because of the stress in shaking and playing the dice, the frequent hitting of the dice on the ludo board can even give cracks on the glass covering the ludo board. One can even experience the dice getting lost in the game because the dice is very small so if care is not taken, it can fall out from the board. All these problems were taken into consideration before