DESIGN AND CONSTRUCTION OF AUTOMATIC GENERATOR STARTING SWITCH
ABSTRACT
The very fundamental reason behind this project is to expose students to the very important aspect of private and independent research work. Not only in theories but also subsequent translation of theoretical research work into a practically functional system. This project the design and construction of an automatic generator switch has been done primarily as a proto type design. It could be further modified to switch other application when desired. Eg it can be connected to electric motor, which was attached to a sliding door to achieve automatic control of the door when a person approach, the door or an alarm bell to give a warning signal to the occupant of the house.
This thesis will prove a valuable aid to those who may wish to embark on project involving photo-devices.
TABLE OF CONTENTS
CHAPTER ONE
1.0    Introduction                                                                  1
1.1    Statement of Problems                                                  2
- Aims and Objective                                                      3
- Limitation of the Project                                                         3
CHAPTER TWO
- Literature Review                                                                   4
2.1    Historical                                                                      5
- Theoretical                                                                    6
CHAPTER THREE
- Design and Construction                                                        8
3.1    Design Method                                                             8
- Circuit Diagram and Description                                  9
- Constructional Method                                               16
CHAPTER FOUR
- Basic Principles of Operation the Components,
Description and Uses                                                    18
4.1    Modification of Resistors                                             19
- Method of Reading the Color Code                              21
- Transistors                                                                             27
- Diodes                                                                          32
- Light Emitting Diodes                                                   36
- Mode of Operation of the (LED) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 37
- Transformer                                                                  38
CHAPTER FIVE
- Conclusion and Recommendation                                44
References                                                                     45
Appendix                                                                              46
CHAPTER ONE
- INTRODUCTION
In the earlier days of the electronic age virtually all the operation of electrical and electronics gadgets were manually operated. Nowadays, most of these contrivances are operated atutomically. A typical device that brings about automatic operation of an automatic electronic generator starting switch. This device helps to reduce labour cost instead of some one being employed, switching the circuit on and off light when there is power failure the automatic switch does that automatically. Secondly, the most important application of this device is for security purposes. This is discussed fully in the chapters of this project.
The automatic generator starting switch works solely on the principle that some material such as selenium cadium sulphide. Selenude and indium automnida here their resistance altered when light falls on them i.e. when (illuminated). This leads us to the most vital components of the device known as light dependent resistor (LDR). If properly connected with a transistor or IC as the case may be and eliminated its resistance will kary. This variation in resistance of LDR will cause a subsequent voltage change at the input – of the transistor there by swinging the transistor into on or off state as the case may be.
