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DESIGN AND CONSTRUCTION OF A DIGITAL TRAINERS SYSTEM

 

ABSTRACT

This work is on digital trainers system. The Digital Trainer is a general-purpose digital experiment board equipped with different built-in circuits as well as a standard PB-501 breadboard. There are: 8 Data Switches - The data switch circuits provides eight DATA OUTPUT pins D1 to D8 whose output level is adjusted using slide switches.

 

CHAPTER ONE
1.1                                                        INTRODUCTION
Digital Trainer is a self contained set of electronic circuits that can be interlinked by students to create working circuits. Component parts cannot be removed or lost in the classroom and intrlinking is performed by short coloured cables fitted with small insulated alligator clips.
Digital logic is the processing of only two states or conditions of ON and OFF. There are certain electronic chips (called gates) that convert simple on and off conditions to create a third on or off condition. The basic gates are AND, OR, NAND, NOR and NOT. These digital gates are explained and combinations of these simple gates in various configurations permits more complex logic or counting and maths to be computed.

When prototyping digital electronic circuits, the digital circuits require specific digital (0-5V) input signals, which then generate digital (0-5V) output signals for monitoring. To accomplish this task a teaching device known as a ‘Digital Trainer’ is utilised. The trainer includes (among other functions) switches for providing digital logic inputs and LED indicators to specify digital logic outputs.

Unfortunately it is impractical to loan out these digital trainers to students, for reason such as: the limited number of digital trainers (compared to the student numbers); the need to use the trainers in multiple repeat laboratories; and the effort required to replace any lost boards. Additionally, the cost of the digital trainer boards makes it unfeasible for students to purchase their own board. Hence students are limited to using the digital trainers within their scheduled laboratory sessions, which inhibits the students gaining extended practice in order to improve their skills.
To provide a method for students to test digital circuits outside the scheduled laboratory times, this device was introduced. The work is a simple and inexpensive limited version of a digital trainer. The device needed be simple enough for the students to construct themselves, and to be affordable enough so that the students could permanently retain the device. The result was the ‘PortBuffer’ system; its development and implementation is described in the following sections.

1.2                                             OBJECTIVE OF THE PROJECT
This objective of this work is study and constructs training modules which display its output via seven segment display.  It is a versatile trainer used as an instructional aid in colleges and universities.  digital trainer circuit prototyping system, for students in their first year digital electronic course. The primary goal was to design an inexpensive, simple to use device that could be retained by students, so that they could undertake digital experimentation in school or at home.

1.3                                              PURPOSE OF THE PROJECT
This digital application trainer is designed to provide further and more extensive studies about some important digital circuits. The trainer offers wide range of most common digital application circuits that are used in digital electronics.

1.4                                         SIGNIFICANCE OF THE PROJECT
The Digital Trainer is a general-purpose digital experiment board equipped with different built-in circuits as well as a standard breadboard. It is as a flexible instructional aid for academic institutions and a powerful development kit in Labs.

1.5                                          APPLICATION OF THE PROJECT
Digital training module is used in:

  • Design student projects
  • Familiarize components used in microprocessor based instruments
  • Design application oriented equipment
  • Design and debugging techniques
  • Perform input / output experiments

1.6                                           LIMITATION OF THE PROJECT
Digital training module to do more work per unit time is to accept that they generate more heat, and somehow this power needs to be got in (as electricity), and then got out again (as waste heat). It is the latter which is causing the greater problems (and has done for most of the time since the invention of the integrated circuit).

1.7                          PROJECT WORK ORGANISATION
The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:
Chapter one of this work is on the introduction to the study. In this chapter, the background, significance, objective limitation and problem of the study were discussed.
Chapter two is on literature review of this study. In this chapter, all the literature pertaining to this work was reviewed.
Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.
Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.
Chapter five is on conclusion, recommendation and references.

 

 

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