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Synopsis for

GSM based Home Security System

Abstract: Home/ Bank/ Office security has been a major issue

where crime is increasing and everybody wants to take proper

measures to prevent intrusion. In addition there was a need to

automate home so that user can take advantage of the

technological advancement in such a way that a person getting off

the office does not get melted with the hot climate.

1. Introduction

This project has 3 basic modules. First module of thisproject detects if person is entering in room. LC displayplaced outside the room displays this status. !nd ifperson has entered then bu""er is turned on. Second partof project ser#es the functionality of a door$latch openingusing a pass%ord entered through &eypad. !s %ell assending this data to a computer through serial port. Thismodule also turns on bu""er if 3 %rong pass%ords are

entered conse'uently. (ser can change this pass%ordanytime he)she %ish using a &eypad. Third module usesL*G gas sensor to detect the gas lea&age. +f there islea&age then bu""er is turned on.GSM modem is used to send the SMS %hene#er there arechanges in any of the three modules.

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2. Block Diagram

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MAJOR HARDWARE USED

1. ! command supporting "#$ mobile phone or "#$ modem

%. &' $icrocontroller

(. $a) %(% I*.

+. ,I' or -aser ') !)

. ire sensor

0. &oltage regulator 23.

. 4iode I5+332. "#$ ,hone

6. -," "as #ensor

13. -*4 107%

3. Block Diagram Description

+t mainly consist of follo%ing bloc&s

1. Transmitter: ,e are going to implement the *ersoncounter module using - transmitters and - recei#ers. ,eare going to use +nfra$ed transmitters because infraredbeams are not #isible to human eyes. Transmitter used is+ L/s

2. Receiver: ,e are going to use an +nfrared recei#er.+t is an acti#e lo% de#ice %hich means it gi#es lo% output%hen it recei#es the +nfrared rays.

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3. Microcontroller:This is the C*( 0central processingunit1 of our project. ,e are going to use a microcontrollerof 24- family. The #arious functions of microcontrollerare li&e +. eading the digital input from infrared recei#er

and 5nd out if person is entering inside house. ++. Sendingthis data to LC so that the person operating this projectshould read the number of persons inside the room. +++.Sensing the pass%ord using &eypad and to chec& %hetherit is a correct pass%ord or a %rong pass%ord and rotatethe stepper motor if the pass%ord entered is a correctpass%ord. +6. Sending the data to the computer usingserial port. This data consist of number of persons inside

the room and the status of entered pass%ord0Correct)%rong1

4. LCD: ,e are going to use -789 alphanumeric Li'uidCrystal isplay 0LC1 %hich means it can displayalphabets along %ith numbers on 9 lines each containing-7 characters.

5. GSM Moem: ,e are going to use sim3 as a GSMmodem. The #alues of number of persons inside theroom: L*G Gas lea&age status and the status of enteredpass%ord 0Correct)%rong1 %ill be sent to GSM modem.

!. "e#$a: (ser %ill enter the pass%ord using the&eypad. 6arious &eys of &eypad are as follo%ing: +. to ;++. /nter +++. /scape

Application and Advantage:

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