dtmf based door opening system report

8/16/2019 DTMF based door opening system REPORT

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DTMF BASED DOOR OPENING SYSTEM WITH SECURED PASSWORD

Abstract:

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 openclose 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

openclose 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.

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


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TABLE OF CONTENTS

Sl.No. Contents Page.No.

1. CHAPTER 1 Introduction

!. CHAPTER !

!.1 Ob"ecti#e $

!.! Bloc% &iagra' (

!. Co')onent List *

. CHAPTER

.1 &esigning +

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

. Selection o 'icrocontroller /

.$ Selection o 0S obile 11

.( Selection o &TF R2 IC 11

.3 Selection o oter 11.* Connections 1!

$. CHAPTER $

Sot,are Re4uire'ent 1

(. 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. (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 onoff&hook. *roperly

understanding and interfacing with these standards is of utmost importance for successful

operation.

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


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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 netor54 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 to&/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 pa00or!

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 9pa00or! entere! '. the 10er:

mat)he0 *th the pa00or! 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 ;$


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B;OC- DIAGRAM

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


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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! Pa00or!4

PO7ER S8PPL9

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


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

COPONENT LIST

Sr. no E4ui)'ent :uantit-

I) /01 #) 2 #T //30 "T#$ I)

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


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4 )rystal %4.135161mh7'

6 8O9T;( +(;-9TO+

1 )+


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.1 &ESI0NIN06

=ince the main intension of this project is to design a "T#$ ?=(" "OO+ 9O)CI@;

=


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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'



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wireless applications, machine to machine or user to machine and remote data

communications in many applications.

.( SELECTION OF &TF 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, Dhara!Pa"e #$


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.*. ! 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:8IREENTS

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


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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=T0, 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, Dhara!Pa"e #=


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#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(

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


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

Table 1. "T#$ keypad frequencies

%with sound clips)

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


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$ig 1. "T#$ keypad layout

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

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


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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.comembeded&projectspic&>&f&//3 project .html



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• http:en.m.wikipedia.orgwikipicLcontrollerMsectionLfooter

• http:microchip.comymsL5100&sensor.html

• www.microe.com

• nd www.triindia.co.in

Department of ECE, SDMCET, Dhara!

dtmf based door opening system report

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