DESIGN AND CONSTRUCTION OF AUTOMATIC GENERATOR STARTING SWITCH
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
1.0 Introduction 1
1.1 Statement of Problems 2
- Aims and Objective 3
- Limitation of the Project 3
- Literature Review 4
2.1 Historical 5
- Theoretical 6
- Design and Construction 8
3.1 Design Method 8
- Circuit Diagram and Description 9
- Constructional Method 16
- 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) 37
- Transformer 38
- Conclusion and Recommendation 44
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.