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ELECTRICALPARAMETERSOPERATED

THROUGHWIRELESSMONITOR

Presented by

A.SRIKANTH (08W41A0403)

D.CHAITHANYA (08W41A0429)

D.RAMESH KUMAR (08W41A0435)

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DESCRIPTION

ThemainobjectiveofthisprojectistooperateelectricalparametersthatareusedathomeappliancesandindustriesusingwirelessPC.Thescope

ofthisprojectis

1.ThatwecanON/OFFsomeelectricalpareameterslikefan,light,motors

etc,.

2.Itshelpsinreducingthehumanwork.

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EMBEDDED SYSTEM

DEFINITION:

It is a combination of computer hardware & software, that is specifically

designed for a particular application implementing the software code to

interact directly with that particular hardware what we built .TYPES OF EMBEDDED SYSTEMS:

1. Stand alone embedded systems

Ex: Digital camera, CD Player, Air Conditioner

2. Real time embedded systems

i. Hardware Real time systemsii. Software Real time systems

3. Networked information appliances

Ex: A web camera is connected to the internet.

4. Mobile devices

Ex: Mobile phone, Personal digital assistants, smart phones etc

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M

I

C

R

O

C

ON

T

R

OL

L

E

R

AMicrocontrollerisasmallcomputeronasingleintegrated

circuitcontainingaprocessorcore,memory(RAM,ROM),and

programmableinput/outputperipherals.

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P

I

N

D

I

AG

R

A

M

FEATURES

4.0Vto5.5VOperatingRange

FullyStaticOperation:0Hzto33MHz

InternalRAMof128bytes

InternalROMof8k

32ProgrammableI/OLines

Two16-bitTimer/Counters

SixInterruptSources

PinDiagramofAT89S52

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POWERSUPPLY

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BLOCKDIAGRAMOFTRANSMITTER

TRANSMITTER

Encoder

Max 232

RF Tx

PC

MICROCONTROLLER

AT89S52

RPS

Crystal

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BLOCKDIAGRAMOFRECIEVER

RECIEVER

MICROCONTROLLER

AT89S52

Decoder

Crystal

Relay

RPS

Relay

Light

RF Rx

DC FAN

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RADIOFREQUENCY

Radiofrequencyreferstoanalternatingelectricalcurrentwith

certainpropertiesthatallowIttobebroadcastfromanantenna.

Ifthecurrentgeneratesanelectromagneticfieldorwaveata

frequencythatissuitableforbroadcastingtelevisionorradio

signals,thenitisconsideredaradiofrequency.

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RFTRANSMITTER

Radiofrequency(RF)transmittersarewidelyusedinradiofrequency

communicationssystems. Thefunctionofaradiofrequency(RF)transmitteristomodulate,

upconvert,andamplifysignalsfortransmissionintofreespaceSPECIFICATIONS:Voltage :3to12volts

Current :10to15mA

Speed :4Kbps

Frequency :315/433MHz

workingmode:AM

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ENCODER HT640

FEATURES

Operatingvoltage:2.4V~12V

LowpowerandhighnoiseimmunityCMOStechnology

Lowstandbycurrent

EasyinterfacewithanRForinfraredtransmissionmedia

Minimalexternalcomponents

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RF RECEIVER

Aradioreceiverisusedforperformingreceivingoperation,

wherebyahighfrequencysignaltransmittedfromradiotransmitter

isreceivedthroughanotherantenna.

RFreceiverconsistsofHT648Ldecoder

SPECIFICATIONS

Voltage :5v

Frequency :315/433MHz

Speed :4KB/S

Current :0.5-0.8mA

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DECODER HT648L

FEATURES

Operatingvoltage:2.4v~12v

Lowpowerandhighnoiseimmunitycmostechnology

Lowstandbycurrent

Capableofdecoding18bitsofinformation

Validtransmissionindicator

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RELAYCIRCUIT

Relaysaredeviceswhichallowlowpowercircuitstoswitcha

relativelyhighCurrent/VoltageON/OFF

Annpn transistor BC547isbeingusedtocontroltherelay

Microcontroller

P0.0

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APPLICATIONS

Smokeandfirealarmsystem

Cardoorcontrollers

Caralarmsystem

Securitysystem

Otherremotecontrolsystems

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ADVANTAGES

LOWCOST

SIMPLETODESIGN

REDUCESHUMANEFFORT

RELIABLECIRCUIT

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CONCLUSION

ThemainobjectiveofthisprojectistoswitchON/OFFtheelectrical

parametersbyusingwirelessPC.

Fromtheabovemethodsandtheories,resultsanddiscussion,the

prototypehasbeensuccessfullyworking.