A step-by-step approach to the construction of a type of transistionized power regulator of known output voltage. A power regulator is described in the course of this project. The zener diode reverse voltage breakdown is used to the advantage to produce a power regulator diode. That is to say, it is possible to use a zener diode to produce a relative constant voltage from a supply voltage, which can itself fluctuate considerably. This kind of diode belongs to a class of material called “semi-conductor” device, which have intermediate values of resistivities between conductors and insulator. These devices have an important property of conducting current in two independent way i.e. by negative charged (free electrons) and positive charge (holes) and that effectively controlled. In a power regulator circuit, zener diode functions as a voltage-regulating device, when connected across a voltage supply source to a load. It maintains constant potential difference across the load despite the fluctuation in the value of the load resistance or of the voltage from the supply source.         

Title Page

Certification

Dedication

Acknowledgement

Abstract

Table of Content 

1.0 Introduction

1.1 Statement of problem

1.2 Aim and objectives of the study

1.3 Justification of study

1.4 Limitation of study 

2.0 Literature review (background information of study)

2.1 Units of power supply regulator

2.2 Transformer

2.3 Rectifier 

2.4 Smoothing 

2.5 Zener diode 

3.0 Design of a stabilized power regulator

3.1 Circuit diagram

4.0 Power regulator and zener characteristic  

5.0 Construction and testing of a power regulator 

5.1 Conclusion