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  【英语翻译Turnonyouraudiosourceandadjustthevolumesoyoucanbarelyheartheoutputonyourspeakerandthensetupthelaserandreceiversothatthebeamstrikesthefrontfaceofthephotoresistor.Assoonasthebeamhitsthephotoresist】

  英语翻译

  Turnonyouraudiosourceandadjustthevolumesoyoucanbarelyheartheoutputonyourspeakerandthensetupthelaserandreceiversothatthebeamstrikesthefrontfaceofthephotoresistor.Assoonasthebeamhitsthephotoresistor,theimpedancewillvarysignificantlyandyouwillhearapopandprobablyabunchofnoise.Playaroundwiththepositionofthebeamtoseehowthepositionofthebeamonthefaceofthephotoresistoraltersthereceptionoftheaudiosignal.Youwillseethattheoptimalpositionforthebeamisjusttouchingthesurfaceofthephotocellsothatanychangesinthebeampositionfromthevibrationswillresultinthemostsignificantswinginvoltageattheoutputofyourheadphones.Ifallyouhearisaloudhum,thenyouprobablyhavetoomuchambientlightinyourroom.Incandescentlightbulbsactuallyvibrateat50or60Hertz,andyouwillhearthatinyoursystemasaloudconstanthum.Asyouhaveprobablyguessed,theLaserSpysystemwillnotperformverywellinthedaytimeduetoambientlightsourcescompetingwithyourlaserbeam,butthisisfinesincerealspiesusuallyoperateinthedarkness!

  Ifyouhaveyourspeakerandlasersetuponthesameworkbench,thentheprocessoftargetingyourphotoresistorwasprobablyonlya10secondjob.Now,trytoplaceyourspeakerattheothersideofyourroomandseehowlongittakestogetthebeambacktothetarget!IfoundthatthedistanceacrossaroommadethealignmentsignificantlymoredifficultandeventhedeflectiononthefloorasIwalkedaroundmadehugechangesinthepositionofthebeam.Youwillalsohavenoticedthatanyslightvibrationsofyourdeskorspeakerstandresultedinallsortsofwildandwackysoundeffectscomingthroughyourheadphones.Atonepoint,Iwasabletohearmyownvoiceduetothethinsurfaceofoneofmytablesvibratingthespeakerstand.

  TheseinitialtestsbecomeveryimportantsothatyouunderstandhowwelltheLaserSpysystemworks,butatthesametimehowincrediblefinickyitwillbetoalignatanyrealdistance.Eventhoughyourtestrigconsistsofnothingmorethanacheaplaserpointerandthreesemiconductors,itisactuallyafullyoperationalunitthatcouldactuallylistentoaconversationamileawayifyoucouldsomehowcapturethereturnbeam.Seriously,this$2unitisnotmuchinferiort

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2020-12-2111:36
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刘仲彬

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2020-12-21 11:38:19
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