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Microcontroller Base Dot Matrix Advert Display
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1) 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
2) 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.
3) 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.
1.6 BLOCK DIAGRAM OVERVIEW The entire project given as an overview is shown in diagrammatically.
Fig
1.0: Block Diagram Overview of the project As the name implies, this
project is micro-controller based, hence a micro-controller called
AT89c51 is employed to serve the purpose with RAM and some other
discrete components that are to be discussed later. In other to reduce
the risk and complications involved in using only discrete components
the project is made up some integrated circuits. Meanwhile,
this project, microcontroller based dot matrix advert display system has
sub units such as: · The mains unit. · The power supply
unit · The switching and timing unit · The address
generators unit · The memory unit/ Micro-controller ·
1.7
PROJECT REPORT ORGANIZATION Six chapters were covered in the
course of design and development of this project. The chapters and their
contents are as follows: Chapter one is the introductory chapter that
gives the aim, scope and justification for the project. This part shows
the significant and the justification of this project that is the
literature review of microcontroller dot matrix advert display system
and its components reviewed, also the history of the project and its
uses were discussed. Chapter Two is literature review. It deliberates on
different related works done by several authors with dates. It also
discusses on the limitations of some of these works. In chapter three, I
discussed the practical system analysis based on what a microcontroller
based dot matrix advert display system will do when fully constructed
and installed. Also discussed is the requirement analysis, which is all
the information, gathered form a wide research on microcontroller based
dot matrix advert display board, data analysis, system design
approaches, top-down, bottom-up, choice of design approaches, data flow
arrangement and the system flow chart are also discussed. Chapter four
deals with the design/preliminary design of how the system will achieve
its function, all these are illustrated here in form of circuit diagram
to show how the main system is linked to the sub system or the modules.
Also discussed here is the user interface design that comprises the
input design and the output design. The software design and
implementation is also discussed in this chapter. The choices of
programming language, soft-hard, and sub-system implementation is also
discussed here. In chapter five I discussed the system testing and the
appropriate software testing strategy to achieve the expected result and
the actual. The performance evolution is also analyzed here. Also
discussed is the system testing and integration, how the components were
tested. The reference evaluation and cost analysis is also discussed
here. Finally the summary of this project is discussed in detail in
chapter six. The contributions of the project, achievements, and
problems for further enhancement, development and advanced discussions
on this topic
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