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DTMF BASED DOOR OPENING SYSTEM WITH SECURED PASSWORD

TABLE OF CONTENTS

Sl.No. Contents Page.No.

1. CHAPTER 1

Introduction 3

. CHAPTER

.1 O!"ecti#e $

. Bloc% &iagra' (

.3 Co')onent List *

3. CHAPTER 3

3.1 &esigning +

3. Po,er Su))l- Section +

3.3 Selection o 'icrocontroller /

3.$ Selection o 0S o!ile 113.( Selection o &TF R2 IC 11

3. Selection o oter 11

3.* Connections 1

$. CHAPTER $

Sot,are Re4uire'ent 13

(. CHAPTER (Circuit O)eration 1(

A))lications and Ad#antages 1*

Future &e#elo)'ent 1*

Reerence 1+

Department of ECE, SDMCET, Dhara!Pa"e #


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CHAPTER 51

Introduction6

The cell phone security system is the result of a fusion of a creative idea with an attempt to

motivate change. Even though modern technology has allowed for the automation of many

aspects of domestic lifestyles, from automatic motion sensing lights to automatic garage door

openers, home security has not seen much benefit from this revolution. Household entry has

long been a very manual routine with little effort to automate the process. Entry into a

residence is still primarily limited to a manual process which involves inserting a key into a

bolt and physically moving the locking mechanism. The cell phone security system aims to

change this. The system takes advantage of the widespread acceptance of cell phones in

today’s society in conjunction with the deep-rooted standards of the landline telephone

network to introduce automation and convenience. The system will allow a user to use their

cell phone to place a call into their home security system. nce the system verifies the caller,

the caller is then allowed to attempt a password entry. !pon successfully entering a

password, the system will automatically unlock the door and grant entrance. This automation

introduces a form of secure, keyless entry into a residence along with the convenience of a

fully responsive security system monitor. The system will primarily interface with telephony

protocols which include dual tone multi fre"uency #$T%&', caller identification #()$', and

some applicable telephony circuit standards. (aller identification will be used in the first

level of security to verify the caller and $T%& will be used in the second level to decode the

button presses that form the password. The telephony standards are necessary for

implementing a correct interface that will allow the phone line to go on*off-hook. +roperly

understanding and interfacing with these standards is of utmost importance for successfuloperation.

CHAPTER$%

Department of ECE, SDMCET, Dhara!Pa"e %


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O&'e(t)*e+

e-.e// entr- ha/ &een a .010r- ho/e a*a).a&).)t- )/ (on2ne! pr)mar).-

to *eh)(.e/3 The (e.. phone /e(0r)t- /-/tem ta4e/ th)/ )!ea of 4e-.e// entr-

an! tran/form/ )t )nto a (on*en)ent, *er/at).e /e(0r)t- /-/tem that 0t).)5e/

(e.. phone te(hno.o"- an! the .an!.)ne te.ephone netor43 B- ta4)n"

a!*anta"e of (a..er )!ent)2(at)on an! !0a.$tone m0.t)$fre60en(- /)"na.)n",

the /e(0r)t- /-/tem ha/ the a&).)t- to )ntro!0(e to$.e*e./ of /e(0r)t-3 The

2r/t .e*e. ).. &e !e(o!)n" the (a..)n" part-7/ )!ent)2(at)on )nformat)on

h).e the /e(on! .e*e. o0.! (on/)/t of the 0/er attempt)n" a pa//or!

entr- o*er the phone3 B- (om&)n)n" the mo&).)t- of th)/

te.e(omm0n)(at)on me!)0m )th m)(ro(ontro..er/, the /-/tem a(h)e*e/ a

/e(0re, (on*en)ent, an! a0tomate! form of /e(0r)t- for a p.a(e of

re/)!en(e Th)/ pro'e(t )/ &a/e! on the (on(ept of DTMF 8!0a. tone m0.t) $

fre60en(-93 E*er- n0mer)( &0tton on the 4e-pa! of a mo&).e phone

"enerate/ a 0n)60e fre60en(- hen pre//e!3 The/e fre60en()e/ are

!e(o!e! &- the DTMF !e(o!er IC at the re(e)*)n" en! h)(h )/ fe! to the

m)(ro(ontro..er3 If the/e !e(o!e! *a.0e/ 8pa//or! entere! &- the 0/er9

mat(he/ )th the pa//or! /tore! )n the m)(ro(ontro..er, then the

m)(ro(ontro..er )n)t)ate/ a me(han)/m to open the !oor thro0"h a motor

!r)*er )nterfa(e

The &.o(4 !)a"ram !ep)(t/ the ent)re or4)n" of the /-/tem 3 The 0/er7/

(e.. phone !)a./ to the (e.. phone atta(he! to the /-/tem3 It a0tomat)(a..-

p)(4/ 0p the (a.. an! re(e)*e/ the DTMF tone/ an! /en!/ )t a/ an )np0t to

DTMF !e(o!er to !e(o!e )t/ BCD (o!e3 The BCD (o!e )/ then /ent to the

m)(ro$(ontro..er h)(h on re(e)*)n" the )np0t on one of )t/ port a(t/

a((or!)n" to the pro"ram &0rnt )n )t3It, on re(e)*)n" the /)"na., /en!/ the

(omman! *)a :%;


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B:OC DIAGRAM

Department of ECE, SDMCET, Dhara!Pa"e =


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F)"3%3# B.o(4 D)a"ram of DTMF Ba/e! Door Open)n" S-/tem W)th Se(0re! Pa//or!3

PO7ER S8PPL9

F)"3%3% B.o(4 D)a"ram of Poer S0pp.-3

Department of ECE, SDMCET, Dhara!Pa"e >


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COPONENT LIST

Sr. no E4ui)'ent :uantit- )( / %(

0 %T 1 $T%& )(

2 (rystal #2./13/4/mh5'

4 67T89E :E9!78T:

/ (:;A

(8+8()T:


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CHAPTER53

CIRC8IT &ISCRIPTION6

3.1 &ESI0NIN06

8


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The output of the transformer is 36 8(C it feed to rectifier that converts 8( to pulsating $(.

8s we all know that there are 2 kind of rectifiers that is

' half wave

0' &ull wave and

2' >ridge rectifier

Here we short listed to use >ridge rectifier, because half wave rectifier has we less in

efficiency. Even though the efficiency of full wave and bridge rectifier are the same, since

there is no re"uirement for any negative voltage for our application, we gone with bridge

rectifier.


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3.$ SELECTION OF 0S OBILE6

9


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3.*. 1 CONNECTIONS OF OBILE HEA&SET 6

The mobile head set should be connected to $T%& :A )( inputs. G 8fter that $T%&

decoder )( output should be connected to the microcontroller.

3.*. CONNECTIONS OF STEPPER OTOR6

)n this project we are using one driver )( 7032$ to ?&& the stepper motor. The

terminals of this 7032$ is connected to the +:T0. #+0.' of microcontroller.

&ig 2.0 +in $iagram f %otor

Department of ECE, SDMCET, Dhara!Pa"e ##


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CHAPTER5$

SOFT7ARE RE:8IREENTS

Beil an 8:% (ompany makes ( compilers, macro assemblers, real-time kernels, debuggers,

simulators, integrated environments, evaluation boards, and emulators for

8:%1*8:%3*(orteD-%2, A(=D*(=D*


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%any companies provide the / assembler, some of them provide shareware version of

their product on the Feb, Biel is one of them. Fe can download them from their Febsites.

However, the si5e of code for these shareware versions is limited and we have to consider

which assembler is suitable for our application.



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CHAPTER5(

CIRC8IT OPERATION6

)n this application we are using mobile phones. To this mobile we are connecting one head

set . This head set output is connected to $T%& :A )( G This is connected to one

microcontroller and after that microcontroller connected to the stepper motor through the

7032$ $:)6E: )(.)n this application we are connecting one door type device to stepper

motor. Here the operation is we are calling to the target mobile . then the mobile release some

dual tone multiple fre"uencies. These fre"uencies are received by the $T%& :A )( and it

converted to binary data. 8nd )t received by the microcontroller and then it can do particular

operation depending upon the binary information. then controller can turn the motor to open

the door as well as close the door by pressing the keys on the keyboard .

Department of ECE, SDMCET, Dhara!Pa"e #=


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Table /. $T%& keypad fre"uencies#with sound clips)

&ig /. $T%& keypad layout

Department of ECE, SDMCET, Dhara!Pa"e #>


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&ig./.0 &ig./.2 8pplication (ircuit with %icro (ontroller

Department of ECE, SDMCET, Dhara!Pa"e #?


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A))lications and Ad#antages6

. This project can be used in offices, companies also at home. )t will provide keyless entry.

0. This can be used in >anks for safety lock.

2. !ser don’t have to carry keys along with him.

Future &e#elo)'ent6

. Fe can monitor parameters like fire, overheat

0. Fe can provide voice feedback system

2. Fe can interface 9


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REFERENCES

• J/ and embedded systemK by %a5idi and %a5idi

• 8ll datasheets from www.datasheetcatalog.com

• 8bout 8T3s0/0 from www.atmel.com

• http**www.atml.com*embeded-projects*pic-=-f-1 project .html

• http**en.m.wikipedia.org*wiki*picLcontrollerMsectionLfooter

• http**microchip.com*ymsL3/-sensor.html

• www.microe.com

• 8nd www.triindia.co.in


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