Abstract
The project is based on Construction of microcontroller vehicle speed alarm system
which automatically warns the driver by activating a panic alarm which is triggered
on when the driver exceeds the speed limit set in the system which also stops the
alarm when the speed is reduced below the set speed limit. A speedometer system is
used to monitor the speed of the car. The voltage output of the speedometer system
is used to set the time the alarm comes on. The other component parts of the system
are power unit which comprises of 5volts regulator and diode for reverse voltage
prevention, micro controller, analog to digital converter (ADC), LED, resistors,
transistors, wires and potentiometer. By proper steps, time and knowledge, one was
able to couple the components together to achieve the desired functions which are
stated in the various chapters of this report. This system can be used for road safety
and measures taken to prevent accident caused by over speeding.
1.1 BACKGROUND OF THE STUDY
The dashboard instrument cluster in a car organizes a variety of sensors and
gauges, including the oil pressure gauge, coolant temperature gauge, fuel level
gauge, tachometer and more. But the most prominent gauge and perhaps the most
important, at least in terms of how many times you look at it while driving is the
speedometer. The job of the speedometer is to indicate the speed of a car in miles
per hour, kilometers per hour or both. Even in late-model cars, it’s an analog device
that uses a needle to point to a specific speed, which the driver reads as a number
printed on a dial.
As with any emerging technology, the first speedometers were expensive and
available only as options. It wasn’t until 1910 that automobile manufacturers began
to include the speedometer as standard equipment. One of the first speedometer
suppliers was Otto Schulze Auto meter (OSA), a legacy company of Siemens
VDO Automotive AG, one of the leading developers of modern instrument
clusters. The first OSA speedometer was built in 1923 and its basic design didn’t
change significantly for 60 years. In this project report, high lights will be on the
history of speedometers, how they work and digitalization of speedometer, add-on
speed checker, and what the future may hold for speedometer design, below is a
pictorial overview of a speedometer.
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Fig1.1: A modern speedometer.
1.2 THE AIM AND OBJECTIVE OF THE PROJECT
? To design a digital speedometer.
? Incorporate a speed monitor with respect to set threshold.
1.3 SCOPE OF THE PROJECT
? Actualization of speed using analog to digital conversion technique;
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? Displaying the analog value in a digital format using an alphanumeric
LCD display;
? Entering the speed limit using keyboard built around to push to make
switches (mode and adjustment keys)
? Implementing hall -effect technique.
1.4 PROJECT REPORT ORGANIZATION
The chapter one is the introductory chapter of the project, chapter two highlights
on the literature review of the project, chapter three highlights on the system
operation chapter four circuit design and implementation, chapter five testing and
results of the project, chapter six summary, recommendation and conclusion of the
project non-chapter pages are: the reference page and appendix.