This system “MICROCONTROLLER BASED AUTOMATIC HAND DRYER SYSTEM” comprises of many modules which are: The Sensor/Input Unit, Microcontroller Unit and the Output Interface. The sensor detects when the hand approaches the nozzle. Once the approaching hand is detected, the hand dryer produces a very hot to dry the hand as well as displaying “busy” on the display unit of the design. Once the hand is removed, the hot air automatically stops and the display unit displays “idle”. In this design I 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 program is embedded in the chip.
TABLE OF CONTENT
Title page…………………………………………………………… i
Certification…………………………………………………….. Ii
Approval Page……………………………………………………iii
Dedication………………………………………………………… iv
Acknowledgment………………………………………………. V
Table of Content……………………………………………….vii
List of Figures……………………………………………………xi
List of Tables……………………………………………………..xii
Abstract……………………………………………………………vi
CHAPTER ONE
AN OVERVIEW OF THE SYSTEM
1.1 Aims and Objectives……………… 14
1.2 Project Specification…………………………………… 15
1.3 Overall System Description/block Diagram…… 16
1.4 Organisation of the Project…………………………. 17
CHAPTER TWO
LITERATURE REVIEW
2.1 Introduction…………………………………………………. 18
2.3 Real-time Computing and Control…………… 18
2.4 Control Systems…………………………. 19
2.4 Implementation Techniques/Design……….… 20
CHAPTER THREE
DESCRIPTION OF MAJOR COMPONENTS
3.1 Information Gathering ………………………….. 21
3.2 Data Analysis …………………………..22
3.3 System Flowchart …………………………………………23
3.4 Power Supply …………………………………24
3.5 Capacitors ………………………………………..25
3.6 Voltage Regulators ………………………………26
Transistors………………………………………….27
Resistors …………………………………………..38
Diode…………………………………………………39
CHAPTER FOUR
SYSTEM DESIGN
4.1 Theory of Design……………………… 40
4.2 Hardware System Specification…………….45
4.3 Port Interface…………………………………………46
4.4 Control Software Design…………………….49
4.4 Requirements…………….52
4.5 Design and Implementation………………………………….54
CHAPTER FIVE
SYSTEM TESTING, INTEGRATION AND PACKAGING
5.1 Test Specifications … … … … … … … … 55
5.2 Test Equipments and Software … … … … … … 56
5.3 System Testing
5.3.1 LED Array Refresh Time Requirements … … … 57
5.3.2 Command/Response Requirements … … … 58
5.4 Power Supply Test
5.4.1Integration Testing and Performance Test….80
5.4.3 System Packaging……………………………………86
CHAPTER SIX
SUMMARY AND CONCLUSION
6.1 Summary of Achievements………………………...……… 100
6.2 Problems Encountered and Solutions………………102
6.3 Recommendation…………………………………………….…103
References
Bibliography……………………………………………………….…….
Appendix A: List of Components
Appendix B: Cost Analysis of Components
Appendix C: Circiut Components Layout
Appendix D: Circiut Wiring Schedule
Appendix E: Full Circiut Design and Wiring Diagram
Appendix F: Source Code Listing
Appendix G: Project Package Photograph
Appendix H: Microcomputer Minimum Specification Required
Appendix E: Project Users Guide
