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

Electrical Electronics Engineering | Industrial Physics | Physics

The design and construction of a blown fuse indicator circuit with LED display involve the meticulous integration of electronic components to create a reliable system for identifying and signaling when a fuse has malfunctioned. This circuit is essential for enhancing safety in electrical systems by promptly alerting users to a faulty fuse. The key components include resistors, transistors, and LEDs. By strategically connecting these elements, the circuit can accurately detect a blown fuse and activate the LED display, providing a visual indication of the issue. Careful consideration of the circuit’s layout and proper selection of components are crucial to ensure its effectiveness. Additionally, incorporating protective measures to prevent false indications and optimizing the circuit for various voltage levels contribute to the circuit’s robustness and applicability in diverse electrical setups.

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

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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.