Dab tsi qauv multimeter ntsuas LED teeb hlaws zoo thiab tsis zoo siv
Pointer multimeter, tig mus rau qhov tsis kam 10K cov ntaub ntawv, nrog cov cwj mem liab thiab dub tau ntsuas LED teeb hlaws, qhov zoo thiab qhov tsis zoo ntawm qhov ntsuas, thaum ntsuas mus rau pawg sib npaug ntawm ob lub teeb hlaws tib lub sijhawm fluorescent teeb, tus taw tes ua haujlwm, yog tias countermeasurement ntawm tsis kaj, lub meter pointer kuj tsis txav, yog li ntawd koj yuav tau paub ib zaug lub zoo thiab tsis zoo theem ntawm LED teeb, lub liab kawg ntawm tus cwj mem rau qhov tsis zoo, yog hais tias koj muab lub LED teeb hlaws dai ntawm lub DC lub zog, nrog rau kev ntsuas ntawm 10K cov ntaub ntawv thaum tus cwj mem Tsuas yog qhov sib txawv, tus cwj mem liab kawg yog qhov zoo.
Nrog lub pointer multimeter los ntsuas lub teeb LED nws qhov zoo tuaj yeem yog los ntawm qhov taw tes taw qhia, lub teeb hlaws ci ntsa iab, Kuv xav tias tsis yog phem dua li lwm cov lus ua tau zoo, koj tuaj yeem sim!
10k tsis kam ua ntaub ntawv siv lub roj teeb 9 txog 15V, thaum txuas nrog hauv cov khoom siv loj, xyuas kom lub pointer rov qab mus rau xoom, koj tuaj yeem ntsuas ntau dua 10k tsis kam.
Vim hais tias cov hlaws LED teeb nrog tsuas yog ob peb milliamps ntawm tam sim no, thaum nws ntsuas qhov tsis kam, qhov me me tam sim no tsim lub voj voog rau LED, ua haujlwm thiab tawm lub teeb daj ntseg.
Ntawm no los ntawm txoj kev los qhia me me ntau lawm: vim hais tias lub multimeter nruab nrog lub roj teeb tsis ruaj khov, kuv nrhiav ob lub xov tooj ntawm tes roj teeb hauv series rau 8v, kom qhov voltage tsis txaus, tus pointer tsis tuaj yeem rov qab mus rau xoom, Kuv yuav hloov lub resistor los ntawm ib tug loj tus naj npawb ntawm resistors nyob rau hauv kev xaiv ntawm ib tug zoo ua ke ntawm resistors, kev hloov kuj zoo heev, siv ib xyoo tom qab nrhiav tau ntawm 10k cov ntaub ntawv pointer tsis tuaj yeem rov qab mus rau xoom, qhia tias lub roj teeb yuav tsum. recharged, nws yooj yim heev kom txuag tau sijhawm.
Cov multimeter feem ntau tuaj yeem ntsuas tau sai heev, ua ntej kuv tshaj tawm lub multimeter los ntsuas lub teeb ci LED hlaws zoo lossis tsis zoo, nrog rau cov ntaub ntawv multimeter diode tuaj yeem ua tau, tam sim no cov multimeter digital yuav luag txhua tus qauv muaj cov iav no, yog li tsis muaj teeb meem twg multimeter. , tuaj yeem ntsuas tau sai heev (tsuas yog rau cov digital, pointer tsis siv ntau).
Series kev sib txuas
Txoj kev tshawb nrhiav no kuj yooj yim heev, thawj zaug yuav tsum tau sim qhib lub teeb pom kev ntawm LED teeb hlaws, liab qab tawm ntawm LED teeb hlaws, feem ntau hauv LED teeb hlaws dai txuas nrog hauv series, yog li xaiv cov iav diode. tuaj yeem siv tau los ntawm LED teeb hlaws, yog tias lub polarity tsis txuas rau qhov thim rov qab, rau ib txwm LED teeb hlaws yuav ci, tsis zoo LED teeb hlaws yuav tsis ci, vim tias peb xaiv lub diode iav, yog li hauv cov zaub vim peb xaiv lub diode iav, yog li nyob rau hauv cov zaub kuj yuav pom tseeb heev los qhia qhov phem LED teeb hlaws thiab zoo LED lub teeb hlaws cov ntsiab lus sib txawv.
Parallel kev twb kev txuas
Rau ntau tshaj ib lub teeb LED hlaws dai nyob rau hauv qhov sib npaug ntawm qhov no, tej zaum yuav muaj cov ntaub ntawv diode thiab tsis tuaj yeem tsav ntau lub teeb hlaws, yog li koj tuaj yeem sim siv 5V fais fab mov hauv nruab nrab ntawm 330Ω series. resistor, lub electrode txuas nrog rau ob hnub ntawm LED teeb hlaws, yog tias koj pom ntau tshaj ib lub teeb ci LED hlaws yog ci, tus neeg LED teeb hlaws tsis teeb, ces qhov yooj yim koj tuaj yeem paub tseeb tias tsis txhob teeb lub hlaws hlaws. lub teeb hlaws dai tsis zoo.
Raws li feem ntau pointer multimeter yog siv ob lub 1.5V roj teeb raws li R × 1-R × 1K tsis kam iav fais fab mov, hauv R × 10K thaiv siv 9V accumulator roj teeb, ntsuas cov hlaws LED yog qhov zoo lossis qhov tsis zoo yuav ua tsis tau. ua kom pom kev zoo li qub.
Txhawm rau ntsuas lub teeb ci LED hlaws kom nws lub teeb, koj yuav tsum siv ntau tshaj 4.5V fais fab mov multimeter.
Kuv ntsia rau tes siv ob peb hom multimeter los ua thwmsim los sib piv, thiab thaum kawg tsuas yog ib tug multimeter yuav muaj peev xwm, nws yog siv 12V me me roj teeb-powered me me portable multimeter, lub ntim yog heev me me, muaj nuj nqi kuj puv. , qhov ntsuas ntawm LED qhov zoo thiab qhov tsis zoo yog qhov yooj yim heev thiab yooj yim.
Cov iav yuav raug hu mus rau "on-off" ntsuas iav, tab sis kuj diode ntsuas thaiv, tus cwj mem liab txuas nrog LED "+" ncej, tus cwj mem dub txuas nrog "-", tuaj yeem ua rau nws lub teeb, ntsuas online kuj yog ib txoj hauv kev zoo los ntsuas qhov LED. Yuav ua rau nws lub teeb, kev ntsuas hauv online kuj tuaj yeem ua tau, tsis muaj kev cuam tshuam. Lub teeb yog qhov zoo, tsis lub teeb yog qhov phem, intuitive heev.
