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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.