Cov teeb meem ntawm cov xim puv xim LED kuj tseem hloov pauv, yog li nws tsis yooj yim los piav qhia meej txog qhov teeb meem twg yog qhov nthuav dav, yog li cia peb tham txog cov txheej txheem tshuaj xyuas thiab kev kho cov kauj ruam ntawm cov xim puv xim LED kho. Yog tias qhov no tuaj yeem ua tau zoo, kuv xav tias LED muaj qhov xwm txheej ntawm lub sijhawm tseem ceeb, thiab cov laj thawj tuaj yeem kuaj xyuas los ntawm cov ntsiab lus no thiab qhov teeb meem tuaj yeem daws tau.
Full xim coj zaub
Cov kev tshawb pom ntawm kev saib xyuas kev saib xyuas yog luv-circuit detection method, resistance detection method, voltage detection method, and voltage drop detection method, yog li cia peb tham txog cov txheej txheem no kom ntxaws.
(1) Short circuit detection method
Teem lub multimeter mus rau lub short-circuit detection iav (feem ntau nrog lub tswb muaj nuj nqi, yog hais tias nws yog qhib, nws yuav beep) los xyuas seb puas muaj ib tug luv luv-circuit phenomenon, thiab lub short-circuit yuav tsum tau daws tam sim ntawd tom qab nws yog. pom. Qhov tshwm sim luv luv-circuit kuj tseem yog qhov tshwm sim feem ntau LED zaub module tsis ua haujlwm. Qee qhov tuaj yeem pom los ntawm kev soj ntsuam IC pins thiab header pins. Kev kuaj xyuas luv luv yuav tsum tau ua thaum lub tshuab hluav taws xob raug kaw kom tsis txhob muaj kev puas tsuaj rau multimeter. Txoj kev no yog txoj kev siv ntau tshaj plaws, yooj yim thiab siv tau zoo. 90 feem pua ntawm kev ua txhaum tuaj yeem kuaj pom thiab txiav txim los ntawm txoj kev no.
(2) Resistance detection method
Teem lub multimeter rau qhov kev tiv thaiv ntau yam, xyuas qhov kev tiv thaiv tus nqi ntawm qee qhov taw tes ntawm lub rooj tsav xwm ib txwm muaj, thiab tom qab ntawd xyuas tib lub ntsiab lus ntawm lwm lub rooj tsav xwm tib lub rooj sib tham los kuaj seb tus nqi tiv thaiv puas txawv ntawm qhov kev tiv thaiv ib txwm muaj, yog tias nws yog. txawv, nws yog txiav txim Qhov Scope ntawm qhov teeb meem.
(3) Txoj kev ntsuas hluav taws xob
Kho lub multimeter mus rau qhov voltage ntau, kuaj xyuas qhov voltage rau hauv av ntawm ib qho chaw ntawm lub voj voog uas xav tias muaj teeb meem, thiab sib piv seb nws puas zoo ib yam li tus nqi ib txwm muaj, uas tuaj yeem yooj yim txiav txim siab txog qhov teeb meem ntawm qhov teeb meem.
(4) Txoj kev ntsuas qhov ntsuas siab
Kho lub multimeter mus rau lub diode voltage nco iav iav, vim hais tias tag nrho cov ICs yog tsim los ntawm ntau yam yooj yim ib feem, tab sis lawv yog miniaturized, yog li thaum muaj ib tug tam sim no dhau los ntawm ib tug ntawm nws tus pin, nws yuav muaj nyob rau ntawm tus pin. Voltage poob. Feem ntau, qhov hluav taws xob poob ntawm tib tus pin ntawm tib hom IC zoo ib yam. Raws li qhov voltage poob tus nqi ntawm tus pin, nws yog ib qho tsim nyog yuav tsum tau ua haujlwm nrog lub zog hluav taws xob tawm.
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