Txhua tus uas tau kho cov khoom siv hluav taws xob paub tias qee zaum nws yog qhov tsim nyog los txiav txim siab nws tus nqi los ntawm qhov pom ntawm tus resistor. Txoj kev yooj yim tshaj plaws yog ntsuas qhov kev tiv thaiv nrog ohmmeter, tab sis qhov teeb meem yog, nws tsis yog ib txwm ua tau rau solder nws yam tsis muaj kev puas tsuaj rau lub rooj tsav xwm hauv Circuit Court, tshwj xeeb tshaj yog cov multilayer, tab sis nws tshwm sim tias muaj kev tsis ntseeg txog kev ncaj ncees ntawm kev sib cuag sab hauv.. Yog tias muaj ib lub voj voog, txhua yam yooj yim - koj tuaj yeem saib rau hauv nws thiab pom tias R18 yog, piv txwv li, 47 ohms. Thiab yog tias nws tsis nyob ntawd, tab sis koj yuav tsum paub nws, thiab koj yuav tau kos lub tswv yim koj tus kheej?
Zoo hmoov zoo, cov tuam txhab lag luam ntawm cov khoom siv hluav taws xob tau pom zoo ntawm lawv tus kheej, thiab muaj cov qauv cim ntawm cov resistors. Muaj tseeb tiag, thiab nws tau hloov pauv ntau xyoo dhau los.
Cov xim cim ntawm cov resistors yog qhov ntau tshaj plaws niaj hnub no. Nws yog ib qho yooj yim heev, thiab nyeem cov denomination, tuav ib tug yooj yim cardboard decoder nyob rau hauv koj txhais tes, yog ib tug teeb meem ntawm vib nas this. Cov cuab yeej no tau dav dav, muaj nyob rau hauv txhua lub khw hauv xov tooj cua thiab pheej yig heev, yog li nws tsis tsim nyog nco txog cov nqi xim. Lub cim ntawm cov resistors muaj nyob rau hauv qhov tseeb hais tias rings ntawm txawv xim yog pleev xim rau ntawm lub kuj,txhua qhov txhais tau tias tus lej, tus lej sib npaug, lossis qib ntawm qhov tseeb.
Strips muaj los ntawm peb mus rau tsib. Lawv yuav tsum tau nyeem los ntawm thawj zaug, nyob ze rau ib qho ntawm cov lus xaus. Piv txwv li, muaj plaub txoj kab. Thawj yog xim av, qhov thib ob yog dub, qhov thib peb yog liab, plaub yog grey. Koj yuav tsum hu rau cov xim no ntawm tus decoder, hla qhov thib peb (nyob ntawd koj yuav tsum xaiv txoj haujlwm "tsis muaj"). Ua tiav, qhov ntawd yog 1 kΩ nrog qhov tseeb ntawm 0.05%. Yog tias muaj peb kab, qhov tseeb yog 20%.
Qee zaum yuav tsum tau ua nrog cov cuab yeej qub qub qub qub uas tseem siv tau. Thaum nws raug cem, nws zoo li tsis paub thiab dab tuag, tab sis lub sijhawm tau qhia qhov tseem ceeb ntawm qee qhov qauv ntawm cov cuab yeej no, thiab tam sim no nws tseem yog qee zaum hu ua "vintage". Lub cim ntawm Soviet-ua resistors yog txawm yooj yim dua li xim, tus nqi tsuas yog sau rau lawv, piv txwv li, 4K7 txhais tau tias 4,700 ohms. Thiab yog nws. Yooj yim thiab meej. Ib qho tsis zoo - cov ntawv sau no yuav nyob hauv qab, cov chaw tsim hluav taws xob Soviet tsis tshua siv "sawv" kev tawm tsam, cov neeg Nyij Pooj nyiam nws kom txuag tau qhov chaw ntawm lub rooj tsavxwm.
Lub tshuab hluav taws xob me me tau tso nws cov tuam txhab ua ntej ntawm qhov xav tau los tsim txoj hauv kev tshiab ntawm mounting. Lub classic soldering ntawm resistors los ntawm lub qhov ntawm lub rooj tsavxwm nyob rau hauv ib tug "sawv" los yog "dag" txoj hauj lwm yuav siv sij hawm ntau qhov chaw, thiab tam sim no ib tug tshiab txoj kev los sib sau ua ke microcircuits tau tshwm sim - smd. Hauv cov lus Askiv luv luv no, peb lo lus tau muab zais: "surface" - nto, "mount" - installation, thiab "technology" - qhov no yog qhov tseeb tias nws txhais li cas. me meqhov chaw yog soldered ncaj qha mus rau txoj kab ntawm qhov chaw, tsis muaj qhov thiab ob txhais ceg. Cov resistors yuav tsum tau rov sau npe, thiab lwm yam khoom xws li diodes thiab capacitors ib yam nkaus.
Kev kos smd resistors yog me ntsis nco txog txoj kev qub qub Soviet. Lawv kuj muaj cov lej thiab cov ntawv sau rau ntawm lawv. Tseem muaj qhov sib txawv. Tsab ntawv tsis yog tam sim no ib txwm muaj, yog tias tsim nyog, "R" yog siv los ua tus lej sib cais.
Piv txwv li, 2183 txhais tau hais tias 218 yuav tsum tau muab faib ua 1000 kom tau 218 kΩ. Kev tawm tsam nrog kev ua siab ntev txog li 10% yog cim nrog plaub tus lej, qhov kawg txhais tau hais tias lub zog uas koj xav tau nce kaum, thiab muab peb tus lej sib npaug los ntawm thawj ob tus lej los ntawm qhov txiaj ntsig no.
Ib qho nyuaj me ntsis nrog cov khoom zoo dua smd, nrog 1% kam rau ua. Ntawm no, qib kaum yog muab los ntawm tsab ntawv, piv txwv li, D yog 10 cubed. Yog tias 10D sau rau ntawm qhov tsis kam, nws txhais tau tias 10 kOhm.
Dhau li ntawm cov rooj saib, tus kws kho yuav xav tau lub iav tsom iav vim tias cov cim me me!
