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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
Physics.
Wikipedia - The Free Encyclopaedia
Google Images
YouTube
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