Design And Construction Of A Blown Fuse Indicator Circuit With LED Display

This is a Blown Fuse indicator circuit by LED Display. A Fuse be the equipment protects that use often most. Because of cheapness can use protect electronics expensive circuit. Generally when fuse torn us can know immediately. but in sometimes Fuse torn already we don’t know. such as in electricity automobile system brake system , the system delays the electric current very much, etc. Fuse torn get into trouble at we must know for immediately the safety. It can show with LED that immediately when Fuse blown. In normally or Fuse is good, Current flow through it to D1-diode 1N4148 as forward bias, so cause Q1-PNP transistor do not conduct current, It not work so LED go out. But Fuse blown or damaged by high currents from overload, cause open circuit. So there the base current to Q1 it so bias or has higher current flow through R1-resistors, collector, emitter of Q1 and LED1 glow immediately.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

1.0      INTRODUCTION

1.1      BACKGROUND OF THE PROJECT

• PURPOSE OF THE PROJECT
• AIM OF THE PROJECT
• OBJECTIVE OF THE PROJECT
• PURPOSE OF THE PROJECT
• LIMITATION OF THE PROJECT
• ADVANTAGES OF THE PROJECT
• PROBLEM OF THE PROJECT
• APPLICATION OF THE PROJECT
• RESEARCH QUESTION
• PROJECT ORGANISATION

CHAPTER TWO

LITERATURE REVIEW

• OVERVIEW OF THE STUDY
• REVIEW OF THE RELATED STUDY

CHAPTER THREE

3.0     CONSTRUCTION METHODOLOGY

3.1      BASIC OF THE SYSTEM

3.2     BLOCK DIAGRAM OF THE SYSTEM

3.3      SYSTEM OPERATION

3.4      CIRCUIT DIAGRAM

3.5      CIRCUIT DESCRIPTION

3.6     DESCRIPTION OF COMPONENTS USED

3.7      POWER SUPPLY UNIT

CHAPTER FOUR

4.0      TESTING AND RESULTS

• CONSTRUCTION PROCEDURE AND TESTING
• INSTALLATION OF THE COMPLET DESIGN
• ASSEMBLING OF SECTIONS
• TESTING OF SYSTEM OPERATION
• COST ANALYSIS

CHAPTER FIVE

• CONCLUSION
• RECOMMENDATION
• REFERENCES

KEYWORD: blown fuse indicator circuit diagram, blown fuse indicator car, blown fuse indicator project report pdf, fuse holder with blown fuse indicator, fuse failure indicator, led indicator circuit diagram

So I would suggest this circuit is simple. It can show with LED that immediately when Fuse blown. See the illustration as Figure 1
In normally or Fuse is good, Current flow through it to D1-diode 1N4148 as forward bias, so cause Q1-PNP transistor do not conduct current, It not work so LED go out.

But Fuse blown or Damaged by high currents from overload, cause open circuit. So there the base current to Q1 it so bias or has higher current flow through R1-resistors, collector, emitter of Q1 and LED1 glow immediately.

by equipment value that show that note for Voltage Source 12V , but if friends want to apply to the level Volt the other.

As a result change value R1 and R2 get by can calculate from R1 = (Vin – 2) x 50 and R2 = (Vin – 2) x 10000/2. Think the work of the circuit has a little, It may help to give friends comfortably up.

How to builds.

This project is not used many components so can assemble on the universal PCB board.as Figure 2 and Figure 3 The wiring and placing components must be carefully for is the polarity of Diodes, LED , transistor BC558 correctly.