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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.
TABLE OF CONTENTS PAGE
Title page i
Approval page ii
Dedication iii
Acknowledgement iv
Abstract v
Table of contents vi
List of figures ix
List of table’s x
CHAPTER ONE: INTRODUCTION
- Background of the study 1
- The aim and objective 2
- Scope of the project 2
- Project report organization 3
CHAPTER TWO: LITERATURE REVIEW
- Historical background 4
- Speedometer 5
- Voltage regulator 8
- Transformer 9
- Diodes 9
- The opt-coupler 11
- Potentiometer 13
- Transistor 14
- Resistor 17
- Microcontroller 19
CHAPTER THREE: SYSTEM OPERATION
- Block diagram of the project 23
- Circuit diagram and operation 25
CHAPTER FOUR: SYSTEM DESIGN AND CONSTRUCTION
- Software designing 32
- Calculating led resistor value 33
- Constructed system circuit 34
CHAPTER FIVE: TEST OF RESULTS, PACKAGING
- Testing of the individual components 36
- Unit by unit testing 36
- System testing 36
- Integration 36
- Packaging 36
CHAPTER SIX: CONCLUSION AND RECOMMENDATION
- Conclusion 38
- Problems encountered and solutions 38
- Suggestion for further improvements 38
- Recommendation 38
APPENDIX A: List of system components 40
APPENDIX B: Component cost table 41
APPENDIX C: System source code 43
BIBLIOGRAPHY 55
LIST OF FIGURES
PAGE
Fig1.1: A modern speedometer 2
Fig2.1: A7805 voltage regulator 8
Fig2.2: Diagram of step down transformer 9
Fig2.3: Diode and its symbol 9
Fig2.4: Diode curve graph 10
Fig2.5: Opt-isolator with phototransistor 12
Fig2.6: LED and its circuit symbol 12
Fig2.7: Potentiometer 14
Fig2.8: Transistor symbol 15
Fig2.9: Resistor and its symbol 17
Fig2.10: Resistor with colour bands 18
Fig2.11: The pin layout of the microcontroller 21
Fig2.12: Architecture of the PIC16F88 microcontroller 22
Fig3.1: Block diagram of the project 23
Fig 3.2: Flow chart 24
Fig3.3: Power supply diagram 26
Fig3.4: Hall Effect module 27
Fig3.5: LED integrated to the control unit (microcontroller) 30
Fig3.6: Complete system diagram 31
Fig4.1: Calculating LED resistor value 33
Fig4.2: System unit 34
LIST OF TABLES
PAGE
Table 2.1: The data sheet 16
Table 2.2: Colour code and tolerance 17
Appendix B Component cost analysis table 41
CHAPTER ONE: INTRODUCTION
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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Abstract should provide a concise summary of the Construction Of Microcontroller Based Vehicle Speed Alarm., including the issue statement, methodology, findings, and conclusion.
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