THE DESIGN AND CONSTRUCTION OF A MICROCONTROLLER BASED DOT MATRIX ADVERT DISPLAY
TABLE OF CONTENT
Title pageCertificationDedicationAcknowledgmentTable of contentCHAPTER ONE1.0 Introduction1.1 Objective of the project design1.2 Preamble1.3 Justification of the project1.4 Scope of the project1.5 Constraints1.6 Block diagram overview1.7 Project report organizationCHAPTER TWOLiterature review2.1 Origin/History of the project2.2 Technology of DOT MATRIX display2.3 Uses of the project2.4 Advantages of the design2.5 Types of DOT MATRIX displayCHAPTER THREE3.0 Design process and implementation3.1 The mains unit3.2 The power supply unit3.3 The address generator’s unit3.4 The memory unit/micro-controller3.5 The drivers unit3.6 Design process3.7 Preliminaries of the design3.8 Detail of design3.9 Software design3.10 Development process3.11 Program entry and editing3.12 Assembling and linking3.13 System control program steps3.14 Software for the programmer3.15 Soft to hard design3.16 Flash or EPROM programmer3.17 Using a personal computer to program the AT89C51CHAPTER FOURMethodology4.1 Information gathering4.2 data analysis4.3 System design approaches4.4 Choice of design approaches4.5 Data flow arrangement4.6 System flowchartCHAPTER FIVESummary and conclusion5.1 Summary of achievement5.2 Problems encountered and solution5.3 Suggestions for further improvement5.4 ConclusionReferencesAppendix 2: Acronyms and their meanings
CHAPTER ONE INTRODUCTION
The purpose of this project is to produce a narrative description of the design and construction of a microcontroller based dot matrix advert display. Firstly computer aided design is the modeling of physical system on Computers allowing both interactive and automatic analysis of design variant and the expression of design in a form suitable for manufacturing. This follows by explaining the microcontroller based dot matrix advert display as a device which is fast gaining wide acceptance and application in the present days due to its ability to provide a very high precision timing. The dot matrix advert display can be describe as an electro-mechanical system for processing information in which the information is represented by physical quantities, which are so constrained to take only discrete values that can be referred to as binary signals. In this design we have implored the use of both hardware and software to bring about the entire project. The hardware components are solely coordinated by the AT89S51 micro controller chip while the C- programming language is used to program the chip.
1.1 OBJECTIVE OF THE PROJECT DESIGN Depending on ones intention, microcontroller based dot matrix advert display system have many aims and objectives. For instance, this one in particular aims at displaying a moveable coded letters that says ‘UNIVERSITY CAFETERIA” Also microcontroller based dot matrix advert display system can be used to control the traffic misunderstanding among motorists especially in junctions. This is achieved by displaying stop, get ready, or move. Some traffic control electronic system displays symbols or color that represents the stated commands above Moreover, microcontroller based dot matrix advert display system is used in electronic scoreboard during football matches to display when a goal is scored, also to display the name of that player who scored the goal. Above all, this system has contributed a lot in boosting advertisement.
1.2 PREAMBLE Micro controller programmable Dot matrix information display system, is a system electronically designed and constructed, that is used to display different information to the view of the masses. The information to be displayed could be diagrams, symbols, letters, colors, numbers, codes, etc depending on what is needed at a particular place and time. This without doubt, has made life easier for the people in different ways; however micro-controller, which is the heart of this system, can be described thus: A micro controller is a computer. All computers, whether we are talking about a personal desktop computer you are using is a general – purpose computer that can run any of thousands of programs. Micron-controllers are special purpose computers. Micro controllers do one thing well. There are a number of other common characteristics that define micro controllers. If a computer matches a majority of these characteristics, then you can call it a micro controller,
Micro controllers are embedded inside some other device (often a consumer product) so that they can control the features or actions of the product. Another name for a micro controller, therefore, is embedded controller Micro controllers are dedicated to one task and run one specific program. The program is stored in ROM (read – only memory) and generally does not change. Micro controllers are often low power devices. A desktop computer is almost always plugged into a wall socket and mighty consumes 50 watts of electricity. A battery-operated micro controller might consume 50 milliwatts. A micro controller has a dedicated input device and often (but not always) has a small LED or LCD display for output. A micro controller also takes input from the device it is controlling and controls the device. Meanwhile the use of a micro-controller to implement an electronic display system design made up of LEDs connected in common cathode matrix form is referred to as micro-controller based programmable dot matrix information display system. This project design is a welcome compliment that displays ‘UNIVERSITY CAFETERIA’
1.3 JUSTIFICATION OF THE PROJECT Due to the various problems encountered in the manual/analog design and construction of signposts for advertisement, there is every need for an automated electronic display system that will solve this problem. This will ensure that viewers get the adequate information that is displayed in good and attractive colors. The though the manual/analog way of displaying information to the view of the people is still targeted viewer are attracted. The height in which advertisement in Nigeria have attained will be maintained if some of its design/construction operation is computerized (Micro controller based information display) especially the one’s that has to do with bigger companies. This will also maintain the good relationship between the company and its numerous customers.
1.4 SCOPE OF THE PROJECT This project can serve in any aspect of life this project (microcontroller based dot matrix advert display) is based on a computer aided design. . In the implementation of this project, the scopes that I shall concentrate more on are: the architecture of the microcontroller port interface, multiplexing the data port control sequence and algorithm of the traffic light. The features of the AT89S51 were exploited to achieve the desired sequence of operation of this project.
1.5 CONSTRAINTS One of the obvious constraints I had in the course of this project was the scarcity of sometimes outright unavailability of some of the required components in the markets. Since scarcity is followed by a hike in price, when such components were even found, they were out rightly expensive. Another major constraint I had was time constraints. I had a relatively short time to source out materials from net, libraries, etc, fully understand the underlying principles and come up with a design that would work. As a result, I had to forgo pleasure and even leisure in order to achieve this.