DESIGN AND CONSTRUCTION OF A LOW VOLTAGE (± 15 VOLTS) POWER SUPPLY UNIT
TABLE OF CONTENTS
CHAPTER ONE
- Introduction 1
1.1 Background of the Study (Aim/Objective) 1
- Statement of Problem 2
CHAPTER TWO
- Literature Review 3
2.1 The Working Principle of a Transformer 3
- Components of a Transformer 6
- Types of Transformers 6
- Rectifier Circuit 7
- Types of Diodes 8
- Analysis of the Components and their Functions 9
- Rectifier Diode 13
- Regulator Stage (Circuit) 16
- Filter Circuit 17
CHAPTER THREE
3.0Construction and Design of a Low 20
Voltage 15v d.c Power Supply Unit
3.1 Circuit Diagram of the Unit 20
3.2Mode of Construction 20
3.3Specifications 21
CHAPTER FOUR
4.0Testing Result, Conclusion and 23
Recommendations
4.1 Precautions Taken During Construction 24
4.2Troubleshooting 24
4.3References 26
CHAPTER ONE
- INTRODUCTION
A low voltage power supply unit is basically al unit that can supply a (variable) d.c voltage output according to the designer(s) specifications. In this case the d.c voltage output is 15v (full wave rectification). (The condition of a (variable) d.c power unit distinguishes it from the power supplied by the National Electric) power Authority (NEPA) or the likes.
BACKGROUNDOF THE STUDY (AIM/OBJECTIVE)
a low voltage power supply unit is designed generally for use in portable electrical and for electronic appliances, namely, portable radio, prano, charging of batteries used in emergency lights and also orders, and for changing of hand sits batteries its importance in battery changing is more obvious due to the frequent NEPA cut.
