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CHAPTER I
INTRODUCTION
In this chapter introduction is made on some general information about digital display for cars, analogue gauge readout, LED display, problem statement, research
objectives and scope of the project.
1.1 Project Overview
Digital display allows you to look at a completely different piece of information. Most cars have analogue readout for displaying fuel level and engine
temperature. Similar, the oil pressure is either shown on an analogue gauge. A digital display, being a numeric display, will not go off the scale easily. A digital display
will also be a lot more instantaneous than an analogue display i.e. it can respond a lot quicker to changing variables.
That is where this Digital Instrument Display comes in. it is designed to operate with any sensor or sender unit which varies its resistance or voltage signal
output and displays the result on four digit LED readout. Basically, it is ideal for use with sender units that have relatively slow changing values as found in fuel level, oil
pressure and temperature gauges.
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1.2 Problem Statement
Analogue displays have a pointer that moves over a graduated scale. This can be difficult to read because of the need to work out the value of the smallest scale
division. Reading through analog display will cause the parallax error. This is because the observers eye and pointer are not in a line perpendicular to the plane of
the scale. By using digital displays, values can be read directly and accurately. Values can also record automatically into a computer for further processing.
LCD display through conventional is too small for monitoring purposes or instances where the numbers would be have to be displayed publicly in hospital,
Bank or Post office as queue numbers. Games such as Sudoku would have to be displayed for people to see
especially during competition. 7-segment is cheap and clearly visible.
1.3 Project Objective
In order to ensure that the project objectives are met, one should: 1. be able to program Peripheral Interface Controller PIC microcontroller.
2. be able display numbers on 7-segment display. 3. be able to use the PIC as an interface to convert various quantities to the
numerical display.
1.4 Scope of Work
