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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 numerical 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 patella 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 in stable multi bibrator. 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 reset 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.
Instrumentation engineering has advanced widely with the introduction of medium scale integration (MSI), large scale integration (LSI) and very large scale integration (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.
1.1 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 throat 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.
1.2 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 eradicated all the
stress, tricks and pranks encounter when playing ludo game.
1.3 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 prevail based on chance because all bias will be eradicated 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.
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.
It will be an unfair treatment to this project of the discussion of limitations that handicapped this important research work is overlooked. Hence it is considered necessary for it will be a stepping stone for the improvement in further work.
The work is limited to just playing and displaying of the number got and the generation of sound though emphasis was not laid on the sound system. Part of the limitations in this project is as a result of their non-inclusion in the scope while others are due to constraints. The design specification was to achieve an electronic dice display that can display from 1-6. also the system is not protected from wrong voltage supplies. Voltage polarities wrongly connected or supplies greater than the specified supply voltage will damage the system.
Most of the constraints were due to lack of tests with detailed information on the theory and the practice of electronic dice display (EDD). As 90% of the components are poverty digital, they are not readily available on the market, some of the components especially the transistors used in sound display were not found in the market so I was forced to use the equivalents as specified in the data book and when some of these components are found they are usually very expensive.
Another problem was lack of equipment in to departmental laboratory for the execution and monitoring of the project, some of the equipment used in the other department market were bad and gave false result. The oscilloscope used was not supplicated enough to display very low frequency outputs of about 1Hz. Also lack of textbooks was another major problem. The few books seen treated components of dice display so shallowly. This calls for designing and redesigning till a working circuit was realized.
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