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科技论文题目TheApplicationofLCD系别尚德光伏学院专业计算机控制技术班级0801学生姓名陈燕学号080403指导教师梁永昌2010年12月BurglartelephonealarmcontrollercircuitdesignSummary：Withthecontinuousdevelopmentofelectronics,appliedelectronicsissteadilymovingtowardanewera.Electronictechnology,electronicdesign,electronicproducts,suchastheever-changingupdatetothepeople'slivesisabigconvenience.Thispaperintroducedaconfusingphone-basedanti-theftcontrollercircuit,ifyouareawayfromhome,aslongasyoumakeaphonecalltohome,yourhomewillsoundtaperecorders,dark,theinteriorlightswillbebright.Thecircuitbythesignalinputcircuit,triggercircuit,drivercircuit,lightsensors,integratedelectronicswitchcircuit.Thedesigndetailoftheanti-theftalarmdetectionphonepartofthewholeproductionprocess,butalsobythecontentofthedesigndoneakindofsuccess.Keywords:telephoneanti-theftelectronicswitchA,designofpurposeandmeaning1.Learningbasictheoryinpracticecomprehensiveuseoftheinitialexperience,masterthebasicmethodsofelectroniccircuitdesign,thedesignprocedure,theabilityoftrainingcomprehensivedesign,2.Throughtheactualsystemapplicationandoperation,todeepentheunderstandingoftheknowledge,3.Throughtheassemblyanddebuggingcultivationofpracticalskills,improvetheanalysisandtheabilitytosolvepracticalproblems.Second,designplanning1,designideaConfuseanti-thefttelephonecontrollercircuit,ifyougooutintheoutside,aslongasyoutocallhome,yourhousewillbeissuedavoicerecorder,dark,indoorlightwillshine.Thiscircuitbypowersupplycircuit,signalinputcircuit,triggercircuit,drivecircuitandphotosensitivesensors,integratedelectronicswitchcircuitcomposed.2,designchartsThird,eachpartofthecircuitdesign1andpowercircuitdesignThedirectcurrentvoltage-stabilizedsourcestructurediagram:UtilityvoltagetransformerandpassthroughthefuseIN4007dioderectifier,lowerbloodpressure,LM7805capactancefiltering,avroutput,useredledsinstructionspowercircuitworkconditionandpowercircuitprincipleasfigure2shows.Figure2powercircuit220VutilityaftertransformerTstep-down,outputvoltage,communicationabout9Vdiode(VD1~VD4)bridgerectifier,capacitanceC1filteroutthehigh-frequencyclutterafterLM7805feet,1to2feetgrounding,3footstableoutputvoltage,voltagefor9V.C2furtherfilterhighfrequencyinterference,supplycircuitwork,redissueddiodeisthepowerindicatorlightemittingdiode,R1isthecurrentlimitingresistor,lightemittingdiodecurrentfornormalworkof10mA.Transformerprincipleisverysimpleelfevidenttransformerismainfunctionofvariablepressure,alsoischangevoltage.Transformerisprincipleelectromagneticinductiontechnology,transformerhastwoindependentlyofsharingacoreofcoil.Respectivelycalledtransformersubprimecoilandprimarycoil.Currentdirectionandsizevarieswithtime,transformerprimarytongonac,transformercorecreatedalternatingmagneticfield,(includingconnectpowerofwindingcalledprimarycoil,therestofthewindingcalledsubprimecoil.Inthesamefrequencyinductionsubprimeistheacvoltage.Thefirstleveloftransformerwindingofturmsthanequalvoltagethan.Transformercanonlychangeacvoltagedcvoltage,anddonotchange,becausethedirectcurrentisnotchange,currentthroughthetransformerwon'tproducealternatingmagneticfield,soonlyinsubprimecoildirectlyconnectedmomentproducesainstantaneouselectriccurrentandvoltage.LM7805isthreeterminalvoltagestabilizerfig.03shows:(1)thefeettotheinputvoltageregulatorUi,3feetforthegroundingend;2feetforvoltagestabilizingvoltageUooutputterminal.LM7805have5V,6V,9V,12V,18Vand24V15V,sevendifferentfixedoutputvoltage,whicharewidelyusedinvariouskindsofelectronicequipment.Maximumoutputcurrentfor1.5mA.LM7805stabilizerwithinternalover-current,thermaloverloadandoutputcrystalfigure3LM7805tubefeetbodytubesafetyprotectionfunction,circuitusedSafeandreliable.Althoughaccordingtofixedvoltagestabilizerwhichdesign,butexternalpickafewcomponents,canmakeadjustablevoltagestabilizeroradjustablestablizedimplementuse.2,signalinputcircuitdesignWhenthetelephoneinhangcondition,telephonelinesL1,L2between40~60Vofdcvoltage,duetothecapacitanceC1,C2role,notbyintegratedcircuitIC1triggeredsuchcomponentsdelaycircuit.Whenpeoplecallscoringcomes,L1,L2comingsignalsubmittedvariablestate,ringingthecapacitanceC!C2coupling,diodes,VD1,VD2timespressurerectification,electricityLettheC3filteredintoapositivedcvoltageuptotriodeV,resultinginthebaseofVsaturatedconductivity3,triggercircuitdesignThiscircuitadoptsNE555time-basedcircuitasschmidttriggercircuit,triggeringhighsensitivityandreliability.Figure8isbythetimebasecircuit555andRA,RB,RCminoritycomponentsadjustablethresholdvoltageSchmitttoggle,visiblebycomparatordriveschmidttriggercircuit,totaloutputhastwoport:oneis3feetofrectangularpulseoutput,Adischargeend(DSC)7feetdischargewaveform(externalcapacitor).(a)circuitdiagram(b)schmidttriggercharacteristics图8AseparatepressureinthecircuitsparesomeinputinRPpotentiometersignalforVin,adjustRPwillinputsignalhasacertainrangechange,accordingtothetriggerresetand555buyacharacteristics,anditsoutputterminalVo(3feet)willhasthefollowingchanges:WhentheinputtriggeredsignalsVin(figure8-lessthanVAb),set2feetforlevellowlevel0,thesixfeetalsoforlowlevel0,theninastate,buy555feethighpotential