mobile operated vehicle

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Cell Phone Operated Vehicle

CHAPTER 1

INTRODUCTION

In this project, the robot is controlled by a mobile phone that makes a call to the mobile

phone attached to the robot. In the course of a call, if any button is pressed, a tone

corresponding to the button pressed is heard at the other end of the call. This tone is called

dual-tone multiple-freuency !"T#$% tone. The robot percei&es this "T#$ tone 'ith the

help of the phone stacked in the robot

The recei&ed tone is processed by the microcontroller 'ith the help of "T#$ decoder

#T(()* .The decoder decodes the "T#$ tone into its eui&alent binary digit and this binary

number is sent to the microcontroller. The microcontroller is pre programmed to take a

decision for any gi&en input and outputs its decision to motor dri&ers in order to dri&e the

motors for for'ard or back'ard motion or a turn. The mobile that makes a call to the mobile

phone stacked in the robot acts as a remote. +o this simple robotic project does not reuire

the construction of recei&er and transmitter units.

1.1 LITERATURE SURVEY

The First Remote Control Vehicle Precision !"i#e# $e%&on'This propeller dri&en radio controlled boat, built by ikola Tesla in (/(, is the

original prototype of all modern-day uninhabited aerial &ehicles and precision guided

'eapons. In fact, all remotely operated &ehicles in air, land or sea. Po'ered by lead-

acid batteries and an electric dri&e motor, the &essel 'as designed to be maneu&ered

alongside target using instructions recei&ed from a 'ireless remote-control

transmitter. Once in position, a command 'ould be sent to detonate an e0plosi&e

charge contained 'ithin the boat1s for'ard compartment. The 'eapon1s guidance

system incorporated a secure communications link bet'een the pilot1s controller and

the surface-running torpedo in an effort to assure that control could be maintained

e&en in the presence of electronic countermeasures. To learn more about tesla1s

system for secure 'ireless communications and his pioneering implementation of the

electronic logic-gate circuit read 2ikola Tesla-3uided 4eapons 5 Computer

Technology1, Tesla Presents +eries Part 6, 'ith commentary by 7eland 8nderson.


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Use O( Remote Controlle# Vehicles D"rin) $orl# $%r II'"uring 4orld 4ar II 9uropean Theater the :.+. 8ir $orce e0perimented 'ith three

basic forms radio-control guided 'eapons. In each case, The 'eapon 'ould be

directed to its target by a cre' member on a control plane. The first 'eapon 'as

essentially a standard bomb fitted 'ith steering controls. The ne0t e&olution in&ol&ed

The fitting of a bomb to a glider airframe, one &ersion, the 3;-< ha&ing a TV camera

to assist the controller 'ith targeting. The third class of guided 'eapon 'as the

remote controlled ;-).

It1s kno'n that 3ermany deployed a number of more ad&anced guided strike 'eapons

that sa' combat before either the V- or V-=. They 'ere the radio-controlled

>enschel1s >s =/68 and ?uhrstahl1s +"


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SYSTE* RE+UIRE*ENTS

6


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CHAPTER ,

SYSTE* RE+UIRE*ENTS'

,.1 HARD$ARE RE+UIRE*ENTS'

,.1.1 L*-/ A*PLIFIER'

Descri&tion'

The 7#D( series consists of t'o independent, high gain, internally freuency compensated

operational amplifiers 'hich 'ere designed specifically to operate from a single po'er

supply o&er a 'ide range of &oltages. Operation from split po'er supplies is also possible

and the lo' po'er supply current drain is independent of the magnitude of the po'er supply

&oltage. 8pplication areas include transducer amplifiers, dc gain blocks and all the

con&entional op amp circuits. 4hich no' can be more easily implemented in single po'er

supply systems. $or e0ample, the 7#D( series can be directly operated off of the standard

EDV po'er supply &oltage 'hich is used in digital systems and 'ill easily pro&ide the

reuired interface electronics 'ithout reuiring the additional FDV po'er supplies.

The 7#6D( and 7#=/*< are a&ailable in a chip siBed package !(-;ump "+;38% using TIGs

"+;38 package technology.

$ig =.H 7#6D( Operational 8mplifier


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,.1., DUAL0TONE *ULTI0FRE+UENCY DT*F2'

"T#$ is a generic communication term for touch tone !a ?egistered Trademark of 8T5T%.

The tones produced 'hen dialing on the keypad on the phone could be used to represent the

digits, and a separate tone is used for each digit. >o'e&er, there is al'ays a chance that arandom sound 'ill be on the same freuency 'hich 'ill trip up the system. It 'as suggested

that if t'o tones 'ere used to represent a digit, the likelihood of a false signal occurring is

ruled out. This is the basis of using dual tone in "T#$ communications. "T#$ dialing uses

a keypad 'ith =J buttons. 9ach key pressed on the phone generates t'o tones of specific

freuencies, so a &oice or a random signal cannot imitate the tones. One tone is generated

from a high freuency group of tones and the other from lo' freuency group. The

freuencies generated on pressing different phone.

Fe%t"res'

K Complete "T#$ ?ecei&er

K 7o' po'er consumption

K Internal gain setting amplifier

K 8djustable guard time

K Central office uality

A&&lic%tions

K ?ecei&er system for ;ritish Telecom !;T% or C9PT +pec !#T(()*"

K Paging systems

K ?epeater systemsmobile radio

K Credit card systems

K ?emote control

K Personal computers

K Telephone ans'ering machine

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Description:

8n #T(()* series "T#$ decoder is used here. The #T(()*"#T(()*"- is a complete

"T#$ recei&er integrating both the band split filter and digital decoder functions. The filter

section uses s'itched capacitor techniues.

$ig =.6H "T#$ Leypad $reuencies!4ith +ound Clips%

There are four freuencies associated 'ith the four ro's, and three freuencies associated

'ith the three columns. 9ach key then specifies t'o freuencies. The "T#$ signal for that

key is the sum of t'o sinusoidal 'a&es, one at each freuency. +o for e0ample, the digit GB. and the other at =*/ >B.

,.1., H03RID!E'

8n >-bridge is an arrangement of transistors that allo's a circuit full control o&er a standard

electric "C motor. That is, 'ith an >-bridge a microcontroller, logic chip, or remote control

can electronically command the motor to go for'ard, re&erse, brake, and coast.

The basic >-bridge that is a good choice for most robots !including ;98# robots% and

portable gadgets. This >-bridge can operate from a po'er source as lo' as t'o nearly-

e0hausted G888G batteries !=.=V% all the 'ay up to a fresh /V battery !/.JV%.

The >-bridge circuit !belo'% looks complicated at first glance, but it is really just four copies

of a resistor E transistor E diode.

J


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$ig =.


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D10D5H "iodes pro&ide a safe path for the motor energy to be dispersed or returned to the

battery 'hen the motor is commanded to coast or stop.

*1H This is a direct-current !"C% motor. These are &ery common. 8nd can find them in

surplus stores online or in sal&aged toys. The motor should ha&e only t'o 'ires. #easure the

resistance of the t'o motor 'ires using a multimeter. If it is much less than D ohms, then the

transistor parts listed in this article are too 'eak to po'er the motor.

Controllin) the H06ri#)e motor #ri7er

The resistors are the inputs that control the >-bridge. ;y connecting a resistor to either

EV"C or 3", it turns on or off the corresponding transistor. !EV"C is the positi&e end of

the battery. 3" is the negati&e end of the battery.% 4hen a particular pair of transistors is

turned on, the motor does something.

Table =.HControlling >-;ridge

Comm%n# R1 R, R- R5

Co%stRollO((

'

3" or

disconnected

EV"C or

disconnected

3" or

disconnected

EV"C or

disconnected

For8%r#' 3" or

disconnected

3" EV"C EV"C or

disconnected

Re7erse' EV"C EV"C or

disconnected

3" or

disconnected

3"

3r%9eSlo8

Do8n'

EV"C EV"C or

disconnected

EV"C EV"C or

disconnected

+ince there are < resistors, there are actually si0teen possible 'ays this circuit can be

commanded. Ne7er apply EV"C to ? and 3" to ?= at the same time.

Ne7er apply EV"C to ?6 and 3" to ?< at the same time, ;attery get short circuited.

8s for the other parts, the resistors !?-?-bridge can be almost any brand,

material, or 'attage. The ma0imum current passing through them 'ill be about / mA, so

wattage isn't a concern. Also, the resistance doesn't have to be exactly

1000 ohms, so precision isn't a concern.

(


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The diodes !"-"-;ridge motor dri&er circuit on a solderless breadboard.

Connect the positi&e end of a battery to the &ery top ro' of the board !EV"C%. Connect the

negati&e end of a battery to the &ery bottom ro' of the board !E3"%.

To try it out, connect a 'ire from 3" to the right-side of ?=. Then, connect a 'ire from

EV"C to the left-side of ?6. The motor should spin for'ard.

,.1.- DC *OTOR'

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8 "C motor relies on the fact that like magnet poles repel and unlike magnetic poles attract

each other. 8 coil of 'ire 'ith a current running through it generates an electromagnetic field

aligned 'ith the center of the coil. ;y s'itching the current on or off in a coil its magnet field

can be s'itched on or off or by s'itching the direction of the current in the coil the direction

of the generated magnetic field can be s'itched (*. 8 simple DC motor typically has a

stationary set of magnets in the stator and an armature 'ith a series of t'o or more 'indings

of 'ire 'rapped in insulated stack slots around iron pole pieces !called stack teeth% 'ith the

ends of the 'ires terminating on a commutator . The armature includes the mounting bearings

that keep it in the center of the motor and the po'er shaft of the motor and the commutator

connections. The 'inding in the armature continues to loop all the 'ay around the armature

and uses either single or parallel conductors !'ires%, and can circle se&eral times around the

stack teeth. The total amount of current sent to the coil, the coilGs siBe and 'hat itGs 'rappedaround dictate the strength of the electromagnetic field created. The seuence of turning a

particular coil on or off dictates 'hat direction the effecti&e electromagnetic fields are

pointed. ;y turning on and off coils in seuence a rotating magnetic field can be created.

These rotating magnetic fields interact 'ith the magnetic fields of the magnets !permanent or

electromagnets% in the stationary part of the motor !stator% to create a force on the armature

'hich causes it to rotate. In some "C motor designs the stator fields use electromagnets to

create their magnetic fields 'hich allo' greater control o&er the motor. 8t high po'er le&els,

"C motors are almost al'ays cooled using forced air.

The commutator allo's each armature coil to be acti&ated in turn. The current in the coil is

typically supplied &ia t'o brushes that make mo&ing contact 'ith the commutator. o',

some brushless "C motors ha&e electronics that s'itch the "C current to each coil on and off

and ha&e no brushes to 'ear out or create sparks.

"ifferent number of stator and armature fields as 'ell as ho' they are connected pro&ide

different inherent speedtorue regulation characteristics. The speed of a "C motor can be

controlled by changing the &oltage applied to the armature. The introduction of &ariable

resistance in the armature circuit or field circuit allo'ed speed control. #odern "C motors

are often controlled by po'er electronics systems 'hich adjust the &oltage by chopping the

"C current into on and off cycles 'hich ha&e an effecti&e lo'er &oltage.

*

http://en.wikipedia.org/wiki/Electromagnetichttp://en.wikipedia.org/wiki/Statorhttp://en.wikipedia.org/wiki/Statorhttp://en.wikipedia.org/wiki/Armaturehttp://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Electromagnethttp://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Power_electronicshttp://en.wikipedia.org/wiki/Power_electronicshttp://en.wikipedia.org/wiki/Statorhttp://en.wikipedia.org/wiki/Armaturehttp://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Electromagnethttp://en.wikipedia.org/wiki/Commutator_(electric)http://en.wikipedia.org/wiki/Power_electronicshttp://en.wikipedia.org/wiki/Electromagnetic


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+ince the series-'ound "C motor de&elops its highest torue at lo' speed, it is often used in

traction applications such as electric locomoti&es, and trams. The "C motor 'as the mainstay

of electric traction dri&es on both electric and diesel-electric locomoti&es, street-carstrams

and diesel electric drilling rigs for many years.

If e0ternal po'er is applied to a "C motor it acts as a "C generator, a dynamo. This feature

is used to slo' do'n and recharge batteries on hybrid car and electric cars or to return

electricity back to the electric grid used on a street car or electric po'ered train line 'hen

they slo' do'n. This process is called regenerati&e braking on hybrid and electric cars. In

diesel electric locomoti&es they also use their "C motors as generators to slo' do'n but

dissipate the energy in resistor stacks. e'er designs are adding large battery packs to

recapture some of this energy.

$ig =.JH "C 3eared motor!** rpm%

,.1.5 RE!ULATED PO$ER SUPPLY'

Descri&tion'

The #C)(@@7#)(@@#C)(@@8 series of three terminal positi&e regulators are a&ailable

in the TO-==*"-P8L package and 'ith se&eral fi0ed output &oltages, making them useful in

a 'ide range of applications. 9ach type employs internal current limiting, thermal shut do'n

and safe operating area protection, making it essentially indestructible. If adeuate heat

sinking is pro&ided, they can deli&er o&er 8 output current. 8lthough designed primarily as

http://en.wikipedia.org/wiki/Railway_electrification_systemhttp://en.wikipedia.org/wiki/Railway_electrification_systemhttp://en.wikipedia.org/wiki/Traction_drivehttp://en.wikipedia.org/wiki/Diesel-electric_locomotivehttp://en.wikipedia.org/wiki/Diesel-electric_locomotivehttp://en.wikipedia.org/wiki/Dynamohttp://en.wikipedia.org/wiki/Hybrid_carhttp://en.wikipedia.org/wiki/Regenerative_brakinghttp://en.wikipedia.org/wiki/Railway_electrification_systemhttp://en.wikipedia.org/wiki/Traction_drivehttp://en.wikipedia.org/wiki/Diesel-electric_locomotivehttp://en.wikipedia.org/wiki/Dynamohttp://en.wikipedia.org/wiki/Hybrid_carhttp://en.wikipedia.org/wiki/Regenerative_braking


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fi0ed &oltage regulators, these de&ices can be used 'ith e0ternal components to obtain

adjustable &oltages and currents

$ig =.)H Pin "iagram Of )(*D

Features

• Output Current up to 1A

• Output Voltages o !

• "hermal Overload #rotection

• $hort Circuit #rotection

• Output "ransistor $ae Operating Area #rotection

$ig =.(HCircuit diagram of ?egulated po'er +upply

,.1. *ICROCONTROLLER'

=


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$ig =./H Pin "iagram of Pic Jf()=

Table =.H Pin Out "escription

6


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D


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*emor: Or)%ni;%tion'

There are three memory blocks in the PICJ$()=. The Program #emory and "ata #emory

ha&e separate buses so that concurrent access can occur. 8dditional information on de&ice

memory may be found in the PICmicroQ #id-?ange ?eference #anual!"+66*=6%.

Pro)r%m *emor: Or)%ni;%tion'

The PICJ$()= has a 6-bit program counter capable of addressing an (L 'ord 0 < bit

program memory space. The PICJ$()= de&ice actually has =L 'ords of $78+> program

memory. 8ccessing a location abo&e the physically implemented address 'ill cause a

'raparound. The ?9+9T &ector is at ****h and the interrupt &ector is at ***


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D%t% *emor: Or)%ni;%tion'

The data memory is partitioned into multiple banks 'hich contain the 3eneral Purpose

?egisters and the +pecial $unction ?egisters. ;its ?P !+T8T:+RJS% and ?P*

!+T8T:+RDS% are the bank select bits.Table =.=H ?epresenting ;anks

RP1'RP< 3%n9

** *

*

* =

6

9ach bank e0tends up to )$h !=( bytes%. The lo'er locations of each bank are reser&ed for

the +pecial $unction ?egisters. 8bo&e the +pecial $unction ?egisters are 3eneral Purpose

?egisters, implemented as static ?8#. 8ll implemented banks contain +pecial $unction

?egisters. +ome freuently used +pecial $unction ?egisters from one bank may be mirrored

in another bank for code reduction and uicker access.

Hi)h Per(orm%nce Risc C&"'

• Only 6D single 'ord instructions to learn

• 8ll single cycle instructions e0cept for program branches, 'hich are t'o-cycle

• Operating speedH "C - =* #>B clock input "C - =** ns instruction cycle

• =L 0 < 'ords of $78+> Program #emory

• =( bytes of "ata #emory !?8#%

• J< bytes of 99P?O# "ata #emory

• Pinout compatible to the PICJC)=8

• Interrupt capability !up to * sources%

• 9ight le&el deep hard'are stack • "irect, Indirect and ?elati&e 8ddressing modes

Peri&her%l Fe%t"res'

% >igh +ink+ource CurrentH =D m8% Timer*H (-bit timercounter 'ith (-bit prescaler

)


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% TimerH J-bit timercounter 'ith prescaler, can be incremented during +799P &ia

e0ternal crystalclock % Timer=H (-bit timercounter 'ith (-bit period register, prescaler and postscaler % One Capture, Compare, P4# module

o Capture is J-bit, ma0. resolution is =.D ns

o Compare is J-bit, ma0. resolution is =** nso P4# ma0. resolution is *-bit

% *-bit, D-channel 8nalog-to-"igital con&erter !8"%% +ynchronous +erial Port !++P% 'ith +PIQ !#aster mode% and I=CQ !#aster+la&e%% ;ro'n-out detection circuitry for ;ro'n-out ?eset !;O?%

Cmos Technolo):'

% 7o' po'er, high speed C#O+ $78+>99P?O technology% 4ide operating &oltage rangeH =.*V to D.DV

% $ully static design% Commercial, Industrial and 90tended temperature ranges% 7o' po'er consumptionH

o R = m8 typical DV, < #>B

o =* U8 typical 6V, 6= k>B

o R U8 typical standby current

S&eci%l *icrocontroller Fe%t"res'

% Po'er-on ?eset !PO?%, Po'er-up Timer !P4?T% and Oscillator +tart-up Timer

!O+T%% 4atchdog Timer !4"T% 'ith its o'n on-chip ?C oscillator for reliable operation% Programmable code protection% Po'er sa&ing +799P mode% +electable oscillator options% In-Circuit +erial ProgrammingQ !IC+PQ% &ia t'o pins% +ingle DV In-Circuit +erial Programming capability% In-Circuit "ebugging &ia t'o pins% Processor read'rite access to program memory

De7ice O7er7ie8'

This document contains de&ice specific information about the PICJ$()= microcontroller.

8dditional information may be found in the PICmicroQ #id-?ang ?eference #anual

!"+66*=6%, 'hich may be obtained from local #icrochip +ales ?epresentati&e or

do'nloaded from the #icrochip 'ebsite. The ?eference #anual should be considered a

complementary document to this data sheet, and is highly recommended reading for a better

(


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understanding of the de&ice architecture and operation of the peripheral modules. The block

diagram of the PICJ$()= architecture is sho'n in $igure =.. 8 pinout description is

pro&ided in Table =.6

Table =.6H Ley $eatures of The Pic J$()=

Intern%l Architect"re'

/


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$ig =.H internal architecture of PICJ$()=

,., SOFT$ARE RE+UIRE*ENTS'

=*


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2.2.1 DIP TRACE :

"ip trace is 9"8 soft'are for creating schematic diagrams and printed circuit boards. The

first &ersion of "ip Trace 'as released in 8ugust, =**EIL'

The WVision I"9 from Leil combines project management, make facilities, source code

editing, program debugging, and complete simulation in one po'erful en&ironment. The

WVision de&elopment platform is easy-to-use and helping you uickly create embedded

programs that 'ork. The WVision editor and debugger are integrated in a single application

that pro&ides a seamless embedded project de&elopment en&ironment.

$ig =./H 4orking 'ith W&ision Leil

2.2.3 FLASH MAGIC:

=

http://en.wikipedia.org/wiki/Schematichttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Parallax,_Inc._(company)http://en.wikipedia.org/wiki/Schematichttp://en.wikipedia.org/wiki/Printed_circuit_boardhttp://en.wikipedia.org/wiki/Parallax,_Inc._(company)


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@P +emiconductors produce a range of #icrocontrollers that feature both on-chip $lash

memory and the ability to be reprogrammed using In-+ystem Programming technology. $lash

#agic is 4indo's soft'are from the 9mbedded +ystems 8cademy that allo's easy access to

all the I+P features pro&ided by the de&ices. These features includeH

& 9rasing the $lash memory !indi&idual blocks or the 'hole de&ice%& Programming the $lash memory& #odifying the ;oot Vector and +tatus ;yte& ?eading $lash memory& Performing a blank check on a section of $lash memory& ?eading the signature bytes& ?eading and 'riting the security bits& "irect load of a ne' baud rate !high speed communications%& +ending commands to place de&ice in ;ootloader mode

$lash #agic pro&ides a clear and simple user interface to these features and more as

described in the follo'ing sections. :nder 4indo's, only one application may ha&e access

the CO# Port at any one time, pre&enting other applications from using the CO# Port. $lash

#agic only obtains access to the selected CO# Port 'hen I+P operations are being

performed. This means that other applications that need to use the CO# Port, such as

debugging tools, may be used 'hile $lash #agic is loaded. ote that in this manual third

party Compilers are listed alphabetically. o preferences are indicated or implied.

$ig =.*H 4orking 'ith $lash #agic

==


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PRO?ECT I*PLE*ENTATION

CHAPTER -

PRO?ECT I*PLE*ENTATION'

=6


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-.1 3LOC> DIA!RA*'

$ig 6.H ;lock "iagram

The robot is so controlled by a mobile phone that makes a call to the mobile phone attached

to the robot. In the course of a call, if any button is pressed, a tone corresponding to the

button pressed is heard at the other end of the call. This tone is called 2dual tone multiple

freuency1 !"T#$% tone. The robot percei&es this "T#$ tone 'ith the help of the phone

stacked in the robot. The amplifier is used to amplify the recei&ed "T#$ signal. The recei&er

tone is processed by (*Dmicrocontroller 'ith the help of a "T#$ decoder C#(()*. The

decoder decodes the "T#$ tone into its eui&alent binary digit and this binary number is

sent to the microcontroller. The microcontroller is preprogrammed to take a decision for any

gi&en input and outputs its decision to motor dri&ers in order to dri&e the motors for for'ard

or back'ard motion or a turn. The mobile that makes a call to the mobile phone stacked in

the robot acts as a remote.

. -., FLO$ CHART'

=


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$ig 6.=H Operational $lo' chart

-.5 APPLICATIONS'

=D


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Scienti(ic '

?emote control &ehicles ha&e &arious scientific uses including haBardous en&ironments,

'orking in the deep ocean , and space e0ploration. The majority of the probes to the other

planets in our solar system ha&e been remote control &ehicles, although some of the more

recent ones 'ere partially autonomous. The sophistication of these de&ices has fueled greater

debate on the need for manned spaceflight and e0ploration. The Voyager I spacecraft is the

first craft of any kind to lea&e the solar system. The #artian e0plorers +pirit and Opportunity

ha&e pro&ided continuous data about the surface of #ars since anuary 6, =**


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=J o&, =**( in #umbai, India. The loss of military personnel can be largely reduced by

using these ad&anced methods. This 'as demonstrated by the successful use of :8Vs during

the =**( hurricanes that struck 7ouisiana and Te0as.

Recre%tion An# Ho66:'

+ee ?adio-controlled model. +mall scale remote control &ehicles ha&e long been popular

among hobbyists. These remote controlled &ehicles span a 'ide range in terms of price and

sophistication. There are many types of radio controlled &ehicles. These include on-road

cars, off-road trucks, boats, airplanes, and e&en helicopters. The robots no' popular in

tele&ision sho's such as ?obot 4ars, are a recent e0tension of this hobby !these &ehicles do

not meet the classical definition of a robotX they are remotely controlled by a human%. ?adio-

controlled submarine also e0ist.

=)


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CONCLUSION @ FUTURE SCOPE

=(


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CONCLUSION'

The primary purpose of the mobile phone operated land ro&er 'ith "T#$ decoder is to

kno' the information in the places 'here 'e cannot mo&e. The robot percei&es the "T#$

tone 'ith the help of the phone stacked in the robot. It pro&ides the ad&antage of robust

control, 'orking range as large as co&erage area of ser&ice pro&ider.

FUTURE SCOPE

IR Sensors'

I? sensors can be used to automatically detect 5 a&oid obstacles if the robot goes beyond

line of sight. This a&oids damage to the &ehicle if 'e are maneu&ering it from a distant place.

P%ss8or# Protection'

Project can be modified in order to pass'ord protect the robot so that it can be operated only

if correct pass'ord is entered. 9ither cell phone should be pass'ord protected or necessary

modification should be made in the assembly language code. This introduces conditioned

access 5 increases security to a great e0tent.

Al%rm Phone Di%ler';y replacing "T#$ "ecoder IC C#(()* by a G"T#$ Transcei&er IC1 C#(((*, "T#$

tones can be generated from the robot. +o, a project called G8larm Phone "ialerG can be built

'hich 'ill generate necessary alarms for something that is desired to be monitored !usually

by triggering a relay%. $or e0ample, a high 'ater alarm, lo' temperature alarm, opening of

back 'indo', garage door, etc.

4hen the system is acti&ated it 'ill call a number of programmed numbers to let the user

kno' the alarm has been acti&ated. This 'ould be great to get alerts of alarm conditions from

home 'hen user is at 'ork.

=/


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REFERENCES

6*


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REFERENCES'

1Y AThe (*D #icrocontroller and 9mbedded +ystems ;y #uhammad 8li #aBidi and

anice 3illispie #aBidi. Pearson 9ducation.

Z=Y +. Chemishkian, A;uilding smart ser&ices for smart home, Proceedings of I999

mobile operated vehicle

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