Kev tsom xam ntawm qhov chaw tam sim no faib rau cov teeb ci LED
Nyob rau yav dhau los incandescent teeb thiab lub zog txuag hluav taws xob ua lag luam, cov teeb ci tseem ceeb thiab cov teeb ci nrog cov kev txwv tshwj xeeb tsim los ntawm cov tuam txhab loj, hauv kev tsim lub zog tsav txhua hnub, nws nyuaj heev los daws qhov yuam kev ntawm cov khoom siv peripheral, ua rau kev tsav tsheb. lub hwj chim tsis muaj nyob deb ntawm lub hom phiaj tseem ceeb ntawm tus tsim. LED muaj nws daim ntawv thov yooj, uas yuav coj tau ntau lub zog mov tshwj xeeb hauv kev tsim yav tom ntej. Lub hauv paus ntsiab lus ntawm kev faib cov tam sim no tsis tu ncua yog los teeb tsa qhov chaw ywj pheej tsis tu ncua ntawm txhua ceg taw tes taw qhia los tswj, tswj thiab tswj ceg. Txoj kev thiab ceg, ceg thiab tag nrho cov kab stability.
Tam sim no, muaj qhov sib txawv loj ntawm kev thov ntawm cov khoom siv LED thiab lub neej ua haujlwm tiag tiag. Kev ruaj ntseg ntawm cov kab tsav yuav cuam tshuam ncaj qha rau tag nrho kev ruaj ntseg ntawm cov khoom. Yog vim li cas rau qhov muaj kev ntseeg siab ntawm cov thev naus laus zis niaj hnub tam sim no yog qhov AC lub zog hluav taws xob txuas ntxiv siv cov khoom siv hluav taws xob hloov hluav taws xob thiab siv cov khoom siv hluav taws xob tas li. Kev sib txuas ntawm kev hloov hluav taws xob siv thev naus laus zis yuav tsim cov xwm txheej zoo rau kev tsim hluav taws xob LED. Raws li tib lub zog tshwj xeeb tshwj xeeb, tsis tas yuav tsim cov qauv siv hluav taws xob tshiab, thiab lub zog tuaj yeem rov qab sib xws, txo cov khoom siv hluav taws xob zoo heev thiab txhim kho cov khoom siv hluav taws xob zoo sib xws.
Kev tsav tam sim no tas li yuav tsum tau tshawb pom tam sim no. Qhov kev coj ua ib txwm yog los txuas milli-txawm tias cov resistors hauv koob kom tau txais cov ntaub ntawv tawm tswv yim. Yuav kom ua tiav kev ua haujlwm siab, tus nqi kuj yuav me dua. me me dhau milli-txawm cov resistors yuav ua rau tsis yooj yim rau kev tsim khoom thiab kev sim. , Ordinary instruments tsis tuaj yeem txheeb xyuas tus nqi raug, thiab cov txheej txheem tsim khoom kuj tseem cuam tshuam rau qhov raug. Qhov kev tiv thaiv hom teeb tsa tam sim no yog ib txoj hauv kev ruaj khov, thiab kev hloov kho tsis yooj yim. Kev sib xyaw ua ke ntawm software thiab kho vajtse yuav qhib lub leap hauv LED daim ntawv thov thev naus laus zis. LED qhov tam sim no precision tus nqi yog software-raws li, uas tuaj yeem txhim kho qhov yooj yim ntawm LED daim ntawv thov. Los ntawm lub khoos phis tawj ua haujlwm software, qhov chaw teeb tsa tam sim no tuaj yeem ua tiav nrog kev sau ntawv digital, thiab cov khoom siv xoom nyob ib puag ncig tuaj yeem tsav tau. Nov yog peb lub hom phiaj. Peripheral zero pab kiag li lawm yuav tsis coj cov tsub zuj zuj ntawm tsim cov cuab yeej parameter yuam kev, yog li zoo heev txhim kho qhov tseeb ntawm qhov tam sim no.
Nws muaj peev xwm tsav LEDs nrog AC fais fab hauv ib qho kev sib txuas, tab sis ib qho kev sib txuas ib leeg tsuas yog ib feem me me ntawm LED tsav tsheb, thiab feem ntau cov ntawv thov muaj kev sib txuas sib txuas. Nyob rau hauv cov ntaub ntawv ntawm kev sib txuas ntawm cov tsav tsheb LED, cov ceg LEDs nyob rau hauv tag nrho qhov kev tsim tam sim no tsis tas yuav ua haujlwm nyob rau hauv lub xeev tam sim no, thiab LED tam sim no ntawm tag nrho cov khoom cuam tshuam ib leeg. Piv txwv li, nyob rau hauv kev tsim ntawm LED txoj kev teeb, tus tsim yuav tsis ncaj qha mus txuas ntau LEDs nyob rau hauv parallel. Cia li nce mus, vim hais tias tom qab ntawd qhov txaus ntshai yuav tshwm sim tam sim ntawd. Qhov kev coj ua ib txwm yog thawj qhov tsis tu ncua thiab tom qab ntawd DC qhov tam sim no, uas ua tiav los ntawm ob theem tsim. Peb paub tias DC tsav kev ua tau zoo yog tias nyob rau hauv qhov tsim nyog qhov hluav taws xob thiab kev thauj khoom, cov neeg tsav tsheb tam sim no tau muab faib ua ntu zus tuaj yeem muab lub peev xwm tsav optocoupler, thiab ib ceg tuaj yeem siv los ua tus sawv cev ntawm txhua ceg. Kev faib tawm tas li tam sim no tuaj yeem sib txuas lus nrog ib leeg kom paub txog kev hloov pauv kev sib txuas, thiab sib haum nrog kev tswj hwm, cov ntaub ntawv nyeem thiab sau cov haujlwm sib txuas.
Peb lub teb chaws txoj kev tsim khoom IC tam sim no tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm LED tsav qhov tseeb, tab sis peb tuaj yeem siv cov thev naus laus zis tshiab thiab cov txheej txheem tshiab kom ua tiav lub ntiaj teb sab saum toj qhov tseeb tam sim no. Precise drive tswj yog ib txoj hauv kev. Kev faib tawm tsis tu ncua tam sim no tuaj yeem suav tau tias yog ib qho kev ua tiav hauv kev siv, tab sis daim ntawv thov tiag tiag raug faib rau txhua qhov ntawm lub voj voog. Nws yog ib lub voj voog uas tuaj yeem tswj tau los ntawm qhov tam sim no thiab tuaj yeem sib txuas lus nrog ib leeg. Circuit Court configuration
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