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1、InfraredremotecontroldecodermicrocontrollerAbstractRemoteeasytouse,featuresandmore.HasbeenwidelyusedinTVsets,VCD,DVD,airconditioningandotherhouseholdappliances,andthepriceischeap,veryeasytobuyonthemarket.Ifyoucansetalotofbuttonsontheremotecontroldecoded.SCMsystemfortheinput.Itistosolvetheconven
2、tionalmatrixkeypadcircuitboardistoolarge,complexwiring,occupyI/Oporttoomanyills.Andthroughtheuseofremotecontroloperationcanbetheseparationofmanandequipment,whichismoreconvenienttouse.Inaddition,thesystemhas16key,whichcanbeusedtoextendthecontrolotherappliances.Thisdesignschemebasedonthedemandoft
3、hemarket,combinedwithinfraredremotecontroldesign,simple,cheap,easycharacteristics.Keywords:infraredremotecontrol、infrared、codes91InfraredTechnology1.1InfraredIR(Infraredrays)isalight,becauseofitswavelengththanredlight(750nm)islonger,thanthehumaneyecanidentifythe(visiblelight)range,sowecannotsee
4、it,alsoknownasinfraredradiation,usually0.75~1000μmwavelengthoflightarecalledinfrared.Generallyuseinfraredcommunicationwithintheinfraredbandnearinfrared,wavelengthsbetween0.75μmto25μm.Infraredisawirelesscommunicationmeansforwirelessdatatransmission1.2ApplicationofinfraredExtremelywiderangeofinfr
5、aredapplications,canbewidelyusedinmedicine,biology,electronics,telecommunicationsandotherindustries.Inmodernelectricalengineeringapplications,theIRisoftenusedasacloselineofsightcommunicationscarrier,themosttypicalapplicationistheTVremotecontrol.Doneusingtheinfraredsignalcarrierhasmanyadvantages
6、:lowcost,scopeanddirectionofpropagationanddistancecanbecontrolled(notthroughthewall,ontheimpactoftelevisionnextdoor),doesnotproduceelectromagneticradiation,butalsodisturbedandsoon.Withinfraredtechnologybecomemoresophisticated,increasingthestandardspecification,theapplicationofinfraredinthenewsl
7、etteralsoincreasing.1.3InfraredremotecontrolformMainlytheremotecontroltransmitter,integratedreceiver,microcontroller,interfacecircuit.Remotecontrolremotecontrolcodeusedtogeneratepulsestodriveinfraredemissioncontrolinfraredremoteco
