study & construction of burglar alarm

7/25/2019 STUDY & CONSTRUCTION OF BURGLAR ALARM

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STUDY OF BURGLAR ALARM

NAME: BISHALMUKHERJEE

CLASS: XII B

ROLL NO:

SCHOOL: KENDRIYAVIDYALAYA, MALIGAON

GUIDED BY: W.B. Singha


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This is to certify that Bishal Mukherjeehassatisfactorily completed the course of PHYSICS

INVESIGATORY PROJECT prescribed by the CBSE

under the AISSCE course in the laboratory of the

school in the year of 2015-2016.

(Date) (Signature of the teacher)


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I would like to sincerely and profusely thank

Miss. W.B. Singha for the valuable guidance,

advice and for giving useful suggestions and

relevant ideas that facilitate an easy and

early completion of the project.


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CONTENTS

AIM

INTRODUCTION

THEORY

MATERIALS REQUIRED

EXPERIMENTAL PROCEDURE

RESULT

OBSERVATION

PRECAUTIONS

BIBLOGRAPHY


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To study the working of a simple burglar alarm


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Burglar(or intrusion), alarms are systemsdesigned to detect unauthorized entry intoa building or area. They consist of an array

of sensors, a control panel and alertingsystem, and interconnections. Sensors

detect intruders by many methods such asmonitoring door and window contacts, by

passive infrared motion detectors,

ultrasound, vibration, electric or magneticfields, or microwaves. Sensors may bedirectly wired to a control panel that

provides sensor power, or maycommunicate wirelessly.

Burglar alarms (orperimeter security systems,perimeter detection

systems, Perimeter protection, intrusion detection systemsand

other terms for the same thing) are used in residential, industrial, and

commercial properties for protection against theft or

property damage.


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What is a burglar alarm?

Basically, the burglar alarm is a device that monitors

the designated area or areas to detect the presence of

suspicious elements. The system takes the help of the

sensor to detect such elements. Once found, the

system sends emergency signals to the user or to the

monitor station if the user so intends.

How the entire system works?

The work of the home security system begins with the

sensors and motion detectors. These devices are

installed in different places that they monitor in their

own ways. However, they send emergency signals to

the control panel once they detect something that

surpasses their tolerance level.

Theory


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Materials Required


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1.An appropriate circuit diagram was made which

showed the appropriate placement ofcomponents.

2.The circuit was completed with the appropriate

application of LDR.

A photoresistor or light-dependent resistor (LDR)

or photocell is a light-controlled variable resistor.

The resistance of a photoresistor decreases with

increasing incident light intensity; in other words,

it exhibits photoconductivity.


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The burglar alarm circuit is made in accordance

with the circuit diagram which uses an LDR andbuzzer and thus a high pitch frequently varying

sound is produced. It can be used in different

ways depending upon the requirement.


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It can be used in many ways:

1. It can be used as a siren in the police vehicles,

fire brigade vehicles and ambulances as it attracts

the attention of the people on the road

immediately.

2. It can also be used as a security system in

banks and other such places to alert the police.

3. It can also be used as a part of a burglar alarm

system as its frequently varying high pitch soundgrabs the attention of the nearby people as well

as alerts the burglar.

4. It can be used as a call bell.

5. It can be fitted in the vehicles of the VIPs.


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1.All the plugs and connections should be neat,

clean, and tight.

2.All the components should be working and

checked.

3.

The current source should be adjustable.


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Comprehensive Laboratory Manual in

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