Tshawb xyuas LEDs nrog lub ntsuas ntsuas ntau: cov lus qhia ib kauj ruam, xyuas cov yam ntxwv

Cov txheej txheem:

Tshawb xyuas LEDs nrog lub ntsuas ntsuas ntau: cov lus qhia ib kauj ruam, xyuas cov yam ntxwv
Tshawb xyuas LEDs nrog lub ntsuas ntsuas ntau: cov lus qhia ib kauj ruam, xyuas cov yam ntxwv

Video: Tshawb xyuas LEDs nrog lub ntsuas ntsuas ntau: cov lus qhia ib kauj ruam, xyuas cov yam ntxwv

Video: Tshawb xyuas LEDs nrog lub ntsuas ntsuas ntau: cov lus qhia ib kauj ruam, xyuas cov yam ntxwv
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Hlis ntuj nqeg
Anonim

Cov teeb taws teeb yog yuav luag ib yam ntawm yav dhau los, muab txoj hauv kev rau ntau cov thev naus laus zis thiab lub zog-npaum LEDs. Tam sim no lawv tau siv txhua qhov chaw: hauv tsev, txoj kev, muaj teeb pom kev zoo, hauv kev lag luam tsheb. Tab sis, zoo li txhua yam khoom siv, cov khoom zoo li no tuaj yeem hlawv tawm. Yuav ua li cas yog tias ib qho ntawm lawv tsis ua haujlwm hauv Circuit Court? Tsis txhob hloov tag nrho cov saw! Qhov tseeb, qhov no tsis xav tau. Nws yuav yog hais txog kev kuaj xyuas LEDs nrog lub tshuab ntsuas ntau, yuav ua li cas nqa tawm thiab txiav txim siab lub anode thiab cathode siv lub tester.

Digital Multimeter
Digital Multimeter

Hom multimeters thiab lawv cov nta

Cov ntsuas no tuaj yeem muab faib ua 2 hom: digital thiab analog. Cov tom kawg tau tshwm sim ntau dhau los thiab muaj tus nqi qis dua, tab sis lawv qhov yuam kev yog ntau dua. Sab nraud, ib qho khoom siv analog tau yooj yim txawv ntawm ib qho digital los ntawm qhov muaj qhov ntsuas nrog tus xub. Txhawm rau kuaj cov LEDs nrog lub ntsuas ntsuas, tus nqi yuam kev tsis muaj teeb meem, tab sis yog tias yuav tsum ntsuas qhov ntsuas siab,Nws yog qhov zoo dua rau caj npab koj tus kheej nrog cov cuab yeej kim dua nruab nrog cov kua siv lead ua kua.

Ua haujlwm nrog cov khoom siv no yooj yim heev. Thaum txuas cov xov hlau nrog kev sojntsuam mus rau qhov sib thooj, nws yog qhov tsim nyog los teeb tsa qhov ntsuas ntsuas uas siv qhov hloov pauv ntawm lub vaj huam sib luag pem hauv ntej. Qee cov qauv xav tau kev ua kom sib cais nrog lub pob lossis hloov pauv.

Analog multimeter
Analog multimeter

Yuav ua li cas txheeb xyuas cov LEDs hauv daim kab xev? Cov lus qhia ib ntus

Tsis ntev los no, qhov teeb pom kev ntawm ob theem qab nthab lossis rooj tog tau dhau los ua ntau yam. Thiab nws yog qhov tsis kaj siab thaum ib feem ntawm qhov chaw lossis tag nrho cov kab xev tawm mus. Hauv qhov no, koj yuav tsum ua raws theem.

Raws li ib txwm, koj yuav tsum pib nrog qhov yooj yim tshaj plaws. Thiab tsuas yog tom qab ntawd txav mus rau ntau qhov nyuaj. Thawj qhov yuav tsum tau kuaj xyuas yog qhov hluav taws xob tso tawm los ntawm lub zog hluav taws xob. Txhawm rau ua qhov no, PSU txuas nrog lub network, qhov hloov pauv ntawm qhov ntsuas tau teeb tsa rau qhov tsim nyog qhov hluav taws xob tas li. Kev ntsuas yog coj los ntawm qhov zoo thiab qhov tsis zoo terminals. Tom ntej no, koj yuav tsum tau xyuas tag nrho cov xov hlau rau kev ncaj ncees. Ua li no, siv lub luv luv Circuit Court hom, uas yog ib qho yooj yim mus nrhiav tau. Los ntawm kov cov kev sojntsuam mus rau ob sab ntawm lub hauv paus, koj tuaj yeem hnov ib lub suab nrov, uas qhia tau tias tsis muaj kev tawg. Txwv tsis pub, cov hlau yuav tsum tau hloov. Yog tias txhua yam nyob hauv qhov kev txiav txim ntawm no, koj tuaj yeem mus kuaj xyuas cov LEDs nrog lub tshuab ntsuas ntau yam tsis tas yuav tshem tawm ntawm daim kab xev.

LED tester kev xeem
LED tester kev xeem

Tus hloov pauv tseem nyob hauv tib hom. Txhua LED yuav tsum tau kuaj.kov lub xov tooj liab mus rau sab ntxiv, thiab qhov kev sojntsuam dub mus rau sab minus. Cov khoom ua haujlwm yuav tsum teeb. Txawm li cas los xij, nws tshwm sim tias qhov no tsis tshwm sim. Hauv qhov no, koj yuav tsum tau saib ntawm qhov screen thiab nco ntsoov cov ntaub ntawv uas tshwm rau ntawm nws. Yuav tsum tau kuaj xyuas qhov polarity thim rov qab - nws yuav pom qhov kev tawg (qhov kev nyeem yuav zoo ib yam hauv ob qho lus qhia). Ntawm qhov tsis raug SMD tivthaiv, lawv yuav txawv heev. Tom qab mus dhau tag nrho cov ntsiab lus thiab nrhiav cov faulty, lawv raug soldered, hloov mus rau cov tshiab. Tom qab ntawd, qhov kev sim ntawm SMD LEDs nrog multimeter tuaj yeem txiav txim siab ua tiav.

Kuv yuav ua li cas yog tias daim kab xev yog coated nrog silicone?

Nyob rau hauv rooj plaub no, nws yog ib qho tsim nyog yuav tsum hloov kho qhov kev sojntsuam me ntsis. Rau qhov no koj yuav xav tau:

  • ob koob;
  • daim kab xev.

Peb siv cov koob rau kev sojntsuam kom lawv sib cuag nrog cov hlau. Tom qab ntawd koj tsuas yog yuav tsum tau khi lawv nrog hluav taws xob daim kab xev. Tam sim no nws yuav yooj yim heev rau tho cov silicone hauv qhov chaw zoo.

xyuas lub LED nrog ib tug multimeter tsis muaj soldering
xyuas lub LED nrog ib tug multimeter tsis muaj soldering

Ntawm cov ntsiab lus zoo tib yam

Yooj yim LEDs nrog ob txhais ceg kuj yooj yim los xyuas. Tib lo lus nug uas tus tswv tshiab muaj yog yuav ua li cas txiav txim siab lub anode thiab cathode. Yog tias lawv tsis tau "tom", tom qab ntawd lub ceg ntev yog lub anode, uas yuav tsum tau txuas nrog lub xov tooj liab. Raws li, ib qho kev sojntsuam dub yog hloov mus rau luv (cathode). Muab hais tias qhov loj ntawm ob txhais ceg yog tib yam, kev sib txuas yog ua nyob rau hauv random kev txiav txim. Nrog kev hloov kom raug, lub caij yuav teeb. Txawm li cas los xij, nws tsis yog ib txwm ua haujlwm raws li qhov xav tau. Ntawm no, ib yam nkaus, tej zaum yuav muajIb qho xwm txheej uas, thaum kuaj cov LEDs nrog lub multimeter, lawv tsis ci. Hauv qhov no, cov lej ntawm lub vijtsam yuav tsum yog raws li hauv qab no:

  • raug sojntsuam txuas - 100-800;
  • reverse - tsis tshaj 1.

Yog tias qhov ntsuas tsis hloov thaum hloov lub polarity, ces lub LED yog faulty. Ntawm ib qho, nws raug kaw tag, ntawm 100-800 nws tawg. Nws tseem tsuas yog muab pov tseg xws li lub hauv paus. Xav paub ntxiv txog qhov no hauv video tom ntej.

Image
Image

Kev ua haujlwm ntxiv ntawm cov ntsuas digital

Kev kuaj xyuas LEDs nrog lub ntsuas ntsuas tuaj yeem ua rau lwm txoj hauv kev, tsis tas siv tshuaj ntsuam xyuas. Tab sis qhov no tsuas yog muaj yog tias lub cuab yeej tau nruab nrog lub transistor test function. Ntawm qhov tshwj xeeb (feem ntau xiav) puag ncig lub platform ntawm cov khoom siv no, muaj qhov sib faib ua 2 ntu - NPN thiab PNP. Txhawm rau kuaj cov qauv LED, koj yuav tsum tau ntxig ob txhais ceg rau hauv NPN cov qhov hauv qab no: anode hauv C, cathode hauv E. Yog tias siv PNP platform compartment, ces kev sib txuas yuav rov qab.

Tshawb xyuas LEDs nrog multimeter yam tsis muaj kev ua haujlwm txuas ntxiv

Yog tias tus ntsuas ntsuas tsis nyob hauv txoj haujlwm xav tau, lwm txoj hauv kev tuaj yeem siv. Nrog rau 5V fais fab mov thiab qhov tsis kam ntawm 100 ohms, lub voj voog qhia hauv daim duab hauv qab no tau sib sau ua ke. Qhov hloov ntawm lub cuab yeej yog teem rau qhov tsis tu ncua voltage. Ntawm no, yog tias lub teeb pom kev zoo, lub teeb ci yuav tshwm sim.

Lub tswv yim rau kev sim LED nrog lub zog ntxiv
Lub tswv yim rau kev sim LED nrog lub zog ntxiv

Koj tuaj yeem siv hom ohmmeter. Yog tias qhov screen hauv ob qho tib sitxoj hauj lwm (thaum hloov polarity) tib cov ntsuas, uas txhais tau hais tias nws yog faulty. Xws li daim tshev yuav tsum tau ua yog tias tsis muaj cov cuab yeej digital ntawm tes lossis nws tau tsim los ntev. Cov khoom siv niaj hnub no, txawm tias pheej yig tshaj, tau nruab nrog cov haujlwm tsim nyog.

Yog tias nws yuav tsum tau sim cov LEDs muaj zog heev, xws li zener diode, siv 12V fais fab mov lossis 9V roj teeb, xws li Krona, raws li lub zog hluav taws xob rau lub voj voog qhia saum toj no.

Zoo kawg

Ntau zaus, cov neeg uas tsis paub yuav ua li cas kuaj LEDs nrog multimeter pov tseg ib daim kab xev tseem siv tau, txawm hais tias tsuas yog ib nti yuav tsum tau hloov hauv nws. Qhov no zoo nkauj irrational. Tsis tas li ntawd, kev ua haujlwm zoo li no tsis siv sijhawm ntau, thiab cov nyiaj khaws cia yog qhov tseem ceeb heev. Qhov ntawd txhais tau tias tsim nyog ua. Ntxiv mus, xws li ib qho kev ua ub no tsis xav tau kev paub.

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