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- No of Pages: 69

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Introduction:

Abstract

This work deals extensively with the design and construction of an electronic dice display (EOD) with audio unit. The device displays the of a hudo dice in numberical form and also produces sound as it displays the number.



The device works with principle of chance employee by ludo game players. The output of the display is usually very rapid that the player does actually sex 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 patellar 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) generated by times (555 times) by connecting in an instable multibibrator. The output from this timer is used in clocking the binary counter (mod to counter) but this counter is biased to count just from zero through six (0-6) as we have in a lodo game dice. To achieve this bias in the mod 10 counter, the output from Qo, Q1 and Q2 were connected to the riset prins so that once the counter finishes the count of six or 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 covert the binary values to the decinal values that are being used in the ludo game dice. The seven segment then displays the numbers by lighting the diodes that make up that particular value.



This device is being regulated by a latch (4-edge triggered flipflope) 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.

Table of Content

Title page



Abstract



Organization of work



List of figures



List of table



Table of content



CHAPTER ONE



INTRODUCTION



1.0 Statement of problem



1.1 purpose of study



1.2 Aims and objectives



1.3 Scope



1.4 Limitations



1.5 Definitions of terms



CHAPTER TWO



Literature Review



CHAPTER THREE



Description and Analysis of the Existing System



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 flowchart



CHAPTER SIX



Documentation



CHAPTER SEVEN



Recommendation and Conclusion



7.1 Recommendation



7.2 Conclusion



Reference

LIST OF FIGURES

FIG 1.0 and gate diagram



Fig 1.1 capacitor diagram



Fig 1.2 seven segment diagram



Fig 3.01 block schematic diagram of an electronic dice display



Fig 3.02 block schematic diagram of an audio unit



Fig 3.03 555 timer schematic circuit diagram



Fig 3.04 555 timer block diagram



Fig 3.05 555 timer configuration



Fig 3.06 pin-out connection of a 555 timer



Fig 3.07a 555 timers in astable mode



Fig 3.07b timing diagram



Fig 3.08 Jk flip flop symbol



Fig 3.09 delay flip-flop from Jk flip-flop



Fig 3.10a delay flip-flop from JK flip-flop



Fig 3.10b D flip-flop timing diagram



Fig 3.11 D type flip-flop in TTL



Fig 3.12 Quad-and gate symbol



Fig 3.13a Circuit block diagram of a digital counter



Fig 3.13b Output wave forms



Fig 3.14a circuit block diagram of mod 10 counter



Fig 3.14b output wave forms



Fig 3.15 Mod 6 counter using decade counter



Fig 3.16 functional logic diagram of BCD to decimal decoder



Fig 3.17 seven segment display layout arrangement



Fig 3.18 seven segment display connections



Fig 3.19 BCD to seven segment block diagram



Fig 3.20 7447 BCD to seven segment decoder driver functional



Fig 4.01 top view of 7414



Fig 4.02 counter configuration for the 7490A



Fig 4.03 top view of 7474



Fig 4.04 top view of SN 7447



Fig 4.05 top view of common unode display



Fig 5.01 output wave of 555 timers









LIST OF TABLE

Table 3.1 time table for sK flip-flop



Table 3.2 delay flip-flop forms flip-flop



Table 3.4 and logic gate truth table



Table 3.5 table of counter output in various forms.



Table 3.7 bid 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

Introduction

Instrumentation engineering has advanced widely with the introduction of medium scale integration (MSI), large scale integration (LSI) and very large scale intergration (VLSI). For purpose of accuracy and reliability, analogue instruments are being replaced by the digital ones. The electronic dice display (DD) with audio unit is among this new bread of instruments.







1.0 STATEMENT OF PROBLEM



The design of an electronic dice display is invented because of the quest for reducing strenuous activities encountered by man, especially in the area of its recreational activities. This device is used in indo game. The indo game in its manual operation can be manipulated by the experts so that it can no longer be a game of chance. Sometimes players can employ tricks on their opponents when playing the game, for example, of the both players are not vigilant, one of them can event thoart 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’s can on the ludo board can even give cracks in the glass covering the ludo board. One can even experience the dice getting cost 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 constructing the electronic dice display.







1.1 PURPOSE OF STUDY



As stated earlier, the design of this device is to help man conguer his environment with the advent of medium scale integration (MSI), integrated circuits (IC) can be used to design devices. That can help man perform his work effectively, with little or no stress and even sometimes at a cheaper into. The devices too will eradieated all the stress, tricks and pranks encounted when playing ludo game.







1.2 AIMS AND OBJECTIVES



The device will in crease the fun derived in play the game, even little kids can now join since they only need to press buttons for the device to work. The game will now be prvely based on chance because all bias will be eradicted no expert can manipulate the device no mater how many times you use it. The normal phenomenon of playing tricks will be in thing of the past.







1.3 SCOPE



The work covered the playing and displaying of the number got. This means that the device when switched on and start button is pressed it will be rapidly displaying the numbers, that is, all the numbers of a ludo dice but when the stop button is dressed a particular number will be shown and this is the number the player got. This means that the player still needs to get a ludo board and the seeds for the game.