DTMF based door opening system REPORT

DTMF BASED DOOR OPENING SYSTEM WITH SECURED PASSWORD

Abst Abstra ract ct : The main objective of this project is to unlock a door by a mobile phone using a unique password entered through the keypad of the phone. Opening and closing of doors involves human labor. In this proposed system, the opening and closing of a door is achieved by using a mobile phone. The owner can call to a mobile phone interfaced to the system which in turn is connected to the door that can openclose the door by entering the password. This method is very convenient as one doesn!t have to carry a key or has to perform any manual labour to openclose the door physically. This project is based on the concept of "T#$ %dual tone multi & frequency'. (very numeric button on the keypad of a mobile phone generates a unique frequency when pressed. These frequencies are decoded by the "T#$ decoder I) at the receiving end which is fed to the microcontroller. If this decoded values %password entered by the user' matches with the password stored in the microcontroller, then the microcontroller initiates a mechanism to open the door through a motor driver interface. $urther this project can be incorporated with an ((*+O# i.e., a non&volatile memory so that the password can be changed by the owner.

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TABLE OF CONTENTS Sl.No. 1.

Contents CHAPTER 1 In Introduction

!. !.1 !.! !. .

(.



$ ( *

CHAPTER  .1 .! . . .$ .( .3 .*

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CHAPTER ! Ob"ecti#e Bloc% &iagra' Co Co')onent List

Page.No.

&esigning Po Po,er Su))l- Section Sele Se lect ctio ion n o 'icr 'icro ocont contro roll ller er Selection o 0S obile Selection o &TF R2 IC Selection o oter Connections

+ + / 11 11 11 1!

CHAPTER $ Sot,are Re4uire'ent

1

CHAPTER ( Circuit O)eration

1(

A))lications and Ad#antages Future &e#elo)'ent Reerence

1* 1* 1+

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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. (ven 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. ousehold entry has long been a very manual routine with little effort to automate the process. (ntry 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. Once 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 frequency %"T#$', caller identification %)I"', and some applicable telephony circuit standards. )aller identification will be used in the first level of security to verify the caller and "T#$ 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 successful operation.

Department of ECE, SDMCET, Dhara! Pa"e %


CHAPTER&$

O'(e)t*+e

-e./e00 entr. ha0 'een a /121r. ho0e a+a*/a'*/*t. *0 )on3ne! pr*mar*/. to +eh*)/e04 The )e// phone 0e)1r*t. 0.0tem ta5e0 th*0 *!ea of 5e./e00 entr. an! tran0form0 *t *nto a )on+en*ent, +er0at*/e 0e)1r*t. 0.0tem that 1t*/*6e0 )e// phone te)hno/o". an! the /an!/*ne te/ephone netor54 B. ta5*n" a!+anta"e of )a//er *!ent*3)at*on an! !1a/&tone m1/t*&fre71en). 0*"na/*n", the 0e)1r*t. 0.0tem ha0 the a'*/*t. to *ntro!1)e to&/e+e/0 of 0e)1r*t.4 The 3r0t /e+e/ *// 'e !e)o!*n" the )a//*n" part.80 *!ent*3)at*on *nformat*on h*/e the 0e)on! /e+e/ o1/! )on0*0t of the 10er attempt*n" a pa00or! entr.

o+er

the

phone4

B.

)om'*n*n"

the

mo'*/*t.

of

th*0

te/e)omm1n*)at*on me!*1m *th m*)ro)ontro//er0, the 0.0tem a)h*e+e0 a 0e)1re, )on+en*ent, an! a1tomate! form of 0e)1r*t. for a p/a)e of re0*!en)e Th*0 pro(e)t *0 'a0e! on the )on)ept of DTMF 9!1a/ tone m1/t* & fre71en).:4 E+er. n1mer*) '1tton on the 5e.pa! of

a mo'*/e phone

"enerate0 a 1n*71e fre71en). hen pre00e!4 The0e fre71en)*e0 are !e)o!e! '. the DTMF !e)o!er IC at the re)e*+*n" en! h*)h *0 fe! to the m*)ro)ontro//er4 If the0e !e)o!e! +a/1e0 9pa00or! entere! '. the 10er: mat)he0 *th the pa00or! 0tore! *n the m*)ro)ontro//er, then the m*)ro)ontro//er *n*t*ate0 a me)han*0m to open the !oor thro1"h a motor !r*+er *nterfa)e The '/o)5 !*a"ram !ep*)t0 the ent*re or5*n" of the 0.0tem 4 The 10er80 )e// phone !*a/0 to the )e// phone atta)he! to the 0.0tem4 It a1tomat*)a//. p*)50 1p the )a// an! re)e*+e0 the DTMF tone0 an! 0en!0 *t a0 an *np1t to DTMF !e)o!er to !e)o!e *t0 BCD )o!e4 The BCD )o!e *0 then 0ent to the m*)ro&)ontro//er h*)h on re)e*+*n" the *np1t on one of *t0 port a)t0 a))or!*n" to the pro"ram '1rnt *n *t4It, on re)e*+*n" the 0*"na/, 0en!0 the )omman! +*a ;$<%D !r*+er to the DC motor an! DC motor a)t0 a))or!*n"/.4 Department of ECE, SDMCET, Dhara! Pa"e =


B;OC- DIAGRAM

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F*"4$4# B/o)5 D*a"ram of DTMF Ba0e! Door Open*n" S.0tem W*th Se)1re! Pa00or!4

PO7ER S8PPL9

Department of ECE, SDMCET, Dhara! Pa"e ?


F*"4$4$ B/o)5 D*a"ram of Poer S1pp/.4

COPONENT LIST Sr. no  2

E4ui)'ent I) /01 #) #T //30 "T#$ I)

Department of ECE, SDMCET, Dhara! Pa"e @

:uantit 


4 6

)rystal %4.135161mh7' 8O9T;( +(;-9TO+

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)+<=T9 O=)I99TO+%.0152mh7' "IO"( *-= ?-TTO@ 9("= +(=I=T(+%220A,6.3kA,0k A' )*)ITO+=%0uf,000uf' #OTO+ 9254"

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> 3 / 5 0  2

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CHAPTER5

CIRC8IT &ISCRIPTION6

Department of ECE, SDMCET, Dhara! Pa"e 

  6 ?OB 1  


.1 &ESI0NIN06 =ince the main intension of this project is to design a "T#$ ?=(" "OO+ 9O)CI@; =<=T(#. In order to fulfill this application there are few steps that has been performed i.e. ' "esigning the power supply for the entire circuitry. 2' =election of microcontroller that suits our application. 4' =election of ;=# #O?I9(. 6' =election of "T#$ +B I).. 1' =election of #OTO+. )omplete studies of all the above points are useful to develop this project.

.! PO7ER S8PPL9 SECTION6 In&order to work with any components basic requirement is power supply. In this section there is a requirement of two different voltage levels. Those are ' 18 ") power supply. 2' 58 ") power supply.

@ow the aim is to design the power supply section which converts 2408 ) in to 18 "). =ince 2408 ) is too high to reduce it to directly 18 "), therefore we need a step&down transformer that reduces the line voltage to certain voltage that will help us to convert it in to a 18 "). )onsidering the efficiency factor of the bridge rectifier, we came to a conclusion to choose a transformer, whose secondary voltage is 4 to 6 8 higher than the required voltage i.e. 18. $or this application 0&58 transformers is used, since it is easily available in the market.

The output of the transformer is 58 )D it feed to rectifier that converts ) to pulsating "). s we all know that there are 4 kind of rectifiers that is ' half wave Department of ECE, SDMCET, Dhara! Pa"e <


2' $ull wave and 4' ?ridge rectifier ere we short listed to use ?ridge rectifier, because half wave rectifier has we less in efficiency. (ven though the efficiency of full wave and bridge rectifier are the same, since there is no requirement for any negative voltage for our application, we gone with bridge rectifier. =ince the output voltage of the rectifier is pulsating "), in order to convert it into pure ") we use a high value %000-$100-$' of capacitor in parallel that acts as a filter. The most easy way to regulate this voltage is by using a 3/01 voltage regulator, whose output voltage is constant 18 ") irrespective of any fluctuation in line voltage.

. SELECTION OF ICROCONTROLLER6 s we know that there so many types of micro controller families that are available in the market. Those are ' /01 $amily 2' 8+ microcontroller $amily 4' *I) microcontroller $amily 6' +# $amily ?asic /01 family is enough for our applicationD hence we are not concentrating on higher end controller families. In order to fulfill our application basic that is T/5)1 controller is enough. ?ut still we selected T/5=12 controller because of inbuilt I=* %in system programmer' option. There are minimum siE requirements for proper operation of microcontroller. Those are: ' power supply section 2' pull&ups for ports %it is must for *O+T0' Department of ECE, SDMCET, Dhara! Pa"e #


4' +eset circuit 6' )rystal circuit 1' I=* circuit %for program dumping' >' (8** pin is connected to 8cc. *O+T0 is open collector that!s why we are using pull&up resistor which makes *O+T0 as an IO port. +eset circuit is used to reset the microcontroller. )rystal circuit is used for the microcontroller for timing pluses. In this project we are not using eEternal memory that!s why (8** pin in the microcontroller is connected to 8cc that indicates internal memory is used for this application.

E2ternal interru) In ts ter C ru P )t O 8 Co S nt C rol

On O 5 n5 c;i c; ) i) RO Bu $ R s I
Ti'er
'e r1 r= S e T2& r i R2& a l P o r t

Co un ter In )u ts

$ig 4.: /01 #icrocontroller

.$ SELECTION OF 0S OBILE6 ;=# %;lobal =ystem for #obile communications' is an open, digital cellular technology used for transmitting mobile voice and data services. ere we are using it only for transmitting and receiving the messages. ;=# wireless data module is used for remote

Department of ECE, SDMCET, Dhara! Pa"e ##


wireless applications, machine to machine or user to machine and remote data communications in many applications.

.( SELECTION OF &TF R> IC6 The #T//30"#T//30"& is a complete "T#$ receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high and lowgroup filters D the decoder uses digital counting techniques to detect and decode all > "T#$ tonepairs into a 6&bit code. (Eternal component count is minimi7ed by on chip provision of a differential input amplifier , clock oscillator and latched three&state bus Interface

.3 SELECTION OF OTOR6 =tepper #otor is widely used in )@) machine drives , robots, and wherever an accurate positioning is required . In such applications, step angle , direction , operating modes% single coil or double coil',

speed and position are important considerations.

stepper motor is a simple dc motor with a permanent magnet rotor and a stator with armature consisting of coils. These coils produce a magnetic field when suitable current flows through them this field produces a torque in the rotor which makes it rotate.Fell these are a little more complicated to control than the simple ") motors but these provide eEact step wise rotation

with an overall turn of ./ degrees  step .

The step wise motion can be easily controlled by a stepper controller which is a simple circuit which takes digital logic and then uses it to turn the motor step wise

.*. 1 CONNECTIONS OF OBILE HEA&SET 6 The mobile head set should be connected to "T#$ +B I) inputs. G fter that "T#$ decoder I) output should be connected to the microcontroller.

Department of ECE, SDMCET, Dhara! Pa"e #$


.*. ! CONNECTIONS OF STEPPER OTOR6 In this project we are using one driver I) 9254" to O@HO$$ the stepper motor. The terminals of this 9254" is connected to the *O+T2. %*2.' of microcontroller.

$ig 4.2: *in "iagram Of #otor

CHAPTER5$

SOFT7ARE RE:8IREENTS Department of ECE, SDMCET, Dhara! Pa"e #%


Ceil an +# )ompany makes ) compilers, macro assemblers, real&time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for +#3+#5)orteE, B)>E)>E=T0, 21, and /01 #)- families )ompilers are programs used to convert a igh 9evel 9anguage to object code. "esktop compilers produce an output object code for the underlying microprocessor, but not for other microprocessors. i.e., the programs written in one of the 99 like )! will compile the code to run on the system for a particular processor like E/> %underlying microprocessor in the computer'.

Department of ECE, SDMCET, Dhara! Pa"e #=


#any companies provide the /01 assembler, some of them provide shareware version of their product on the Feb, Ciel is one of them. Fe can download them from their Febsites. owever, the si7e of code for these shareware versions is limited and we have to consider which assembler is suitable for our application.

CHAPTER5(

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CIRC8IT OPERATION6 In this application we are using mobile phones. To this mobile we are connecting one head set . This head set output is connected to "T#$ +B I) G This is connected to one microcontroller and after that microcontroller connected to the stepper motor through the 9254" "+I8(+ I).In this application we are connecting one door type device to stepper motor. ere the operation is we are calling to the target mobile . then the mobile release some dual tone multiple frequencies. These frequencies are received by the "T#$ +B I) and it converted to binary data. nd It 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 .

Table 1. "T#$ keypad frequencies %with sound clips)

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$ig 1. "T#$ keypad layout

$ig.1.2 =chematic diagram of *OF(+ =-**9<

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$ig.1.4 pplication )ircuit with #icro )ontroller

A))lications and Ad#antages6

. This project can be used in offices, companies also at home. It will provide keyless entry. 2. This can be used in ?anks for safety lock. 4. -ser don!t have to carry keys along with him.

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Future &e#elo)'ent6

. Fe can monitor parameters like fire, overheat 2. Fe can provide voice feedback system 4. Fe can interface ;=# modem which will send sms if invalid attempt is made to open the lock.

REFERENCES

•

J/01 and embedded systemK by #a7idi and #a7idi ll datasheets from www.datasheetcatalog.com bout T/5s/212 from www.atmel.com

•

http:www.atml.comembeded&projectspic&>&f&//3 project .html

• •

Department of ECE, SDMCET, Dhara! Pa"e #<


•

http:en.m.wikipedia.orgwikipicLcontrollerMsectionLfooter

•

http:microchip.comymsL5100&sensor.html

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www.microe.com

•

nd www.triindia.co.in

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DTMF based door opening system REPORT

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