DESIGN AND CONSTRUCTION OF A MULTIPURPOSE SECURITY SYSTEM WITH ALARM AND DISPLAY

DESIGN AND CONSTRUCTION OF A MULTIPURPOSE SECURITY SYSTEM WITH ALARM AND DISPLAY

ABSTRACT

This project report is a thesis written specifically to cover the design, analysis, construction, testing, and packaging of a multipurpose security system made from readily available electric components.

The report discusses the various alarm system units and stages, which include:

a) Unit for clock generation and frequency division.

b) The control and section unit, which includes a one-shot 555 timer multiplexer, a sound amplifier, and a latch.

c) The detection and switching unit, which includes the fire and burglar sensors as well as the priority encoder.

d) The output unit, which includes the visual display and audio systems. These units have been clearly represented with block diagrams, and the calculations and analysis of each component in the circuit have been carried out.

Each block was completed in the subsequent chapters of this section.

My project, on the other hand, is intended to serve three functions: to detect human touch, burglar operation, and fire, and to provide the appropriate alarms and indications.

When there is a need to monitor the movement of people in a confidential building or restricted area, or to alert security-men in the event of a fire outbreak, a multipurpose security system is an electronic device that detects human shadow, human touch, and fire and alerts security-men through an alarm, as well as displaying the specific room or area in which the target was hit.

The multi-purpose security system employs a Light Dependent Resistor (LDR) to detect human shadows, a touch switch to detect human touch, and a thermistor to detect heat.

to detect fire.

The circuit is designed in such a way that if a sensor is installed in each different room, say rooms 1, 2, and 3, etc. If an intruder tries to enter, say, room 2, and touches the door handle, the touch sensor detects his touch, triggering an alarm and displaying room 2 on a large display board. If a fire breaks out in the same room 2, the fire sensor will detect it, sound an alarm, and display room 2. This also applies to the entire room that has the sensor.

A multipurpose security system can be used to protect lives and property in banks, industries, financial institutions, schools, and homes.

CHAPTER ONE

INTRODUCTION

The current and likely future state of the world economy as a whole, and particularly that of Nigeria as a developing country, has made life uncomfortable and unsatisfactory for the masses.

Every day, we hear about wars, conflicts, massive natural disasters, fatal accidents, tribal, racial, and religious conflicts, to name a few.

All of these occurrences always result in the wanton destruction of life and property worth millions of naira.

As a result of these heinous situations in our country today, in particular, coupled with unemployment, which has resulted in a decline in our standard of living, a crime wave has erupted. Because the youths and young school leavers were unable to find work that would have kept them occupied.

Furthermore, since the idle Mind is the devil’s workshop; they engage in heinous and scandalous crimes to make ends meet. Assassination, highway robbery, house burglary, arson, car snatching, and other crimes have become the norm. Criminals deliberately set fire to public markets in order to steal people’s hard-earned merchandise. As a result, our markets have recently been on fire.