Lub resistor nqi - txoj kev ntawm cov ntaubntawv povthawj siv

Resistors - lub ntsiab ntawm hluav taws xob circuits muaj kam mus rau lub tso cai ntawm lub fais tam sim no. Lawv yog siv nyob rau hauv tag nrho cov hluav taws xob circuits, txawm nyob rau hauv lub feem ntau elementary. Paub qhov txawv resistors los ntawm cov nram qab no nta: hwj chim ntawm lub nominal kuj cov chav kawm ntawv ntawm cov neeg . Ntawm lub siab, thiab lwm yam Nyob rau hauv no tsab xov xwm, peb yuav xav txog xws li ib tug tshaj plaws li kuj muaj nuj nqis. Yuav ua li cas yog nws? Nyob rau hauv lub denomination ntawm cov kuj caij txhais li cas theem nqi ntawm Internal kuj cov zaj uas lub fais tam sim no therethrough. Cov hluav taws xob resistor tus nqi yog denoted los ntawm Latin cov tsiaj ntawv R. Qhov no tus nqi yog feem ntau sau ib daim ntawv nyob rau hauv xws units, raws li Om. Qhov no unit yog muaj npe tom qab tus naas ej German physicist Georg Simon Ohm, lub npe hu rau nws ua hauj lwm nyob rau hauv lub teb ntawm hluav taws xob tam sim no. Yuav ua li cas koj yuav tsum tau paub qhov muaj nqis ntawm resistors? Yuav ua li cas yuav koj xaiv lub ntsiab rau ib tug tswvyim tsim los tos ib tug analog ntawm kho ntaus ntawv.

Xav txog cov ntaubntawv povthawj siv txoj kev nominal kuj tseem ceeb rau lub tsev hais. Muaj peb txoj kev npav resistors: Cov - muaj xws li xwb tus xov tooj; cim - yog ib tug ua ke, nrog rau cov zauv thiab cov tsiaj ntawv yog tam sim no; thiab thaum kawg cov xim - yog ib tug series ntawm transverse bands ntawm cov xim txawv, tus xov tooj ntawm kab khiav yog sib txawv, los ntawm 3 mus rau 5.

Ntxiv tsom xam raws li sau tseg resistor nqi nyob ntawm seb lub hom caij. Qhov kuj hlau-hom ntsiab yog cylindrical chim. Cim los ntawm xws li hais nyob rau hauv tag nrho peb txoj hau kev. Cov ntaubntawv povthawj siv yog tsuas yog siv rau resistors, tus nqi ntawm cov nominal tus nqi uas tsis pub tshaj 999 ohms. Nws zoo raws li nram no: 2.0; 220; 750. Txhais tau tias feem 2 ohms, 220 ohms thiab 750 ohms. Tom ntej no cov ntaubntawv povthawj siv hom siv ib tug tsis nco qab cov tsiaj ntawv ntawm lub Latin tsiaj ntawv: R - yog ib chav tsev; K - ib tug kilo, piv txwv li 1000; M - mega, piv txwv li 1000000. Nws hloov tawm hais tias nrog no cov ntaubntawv povthawj siv txoj kev, nyob rau hauv thiaj li yuav tau lub resistor nqi yuav tsum yuav ib tug numeric tus nqi khoo los ntawm tus nqi ntawm cov literal. Ib qho piv txwv ntawm xws li ib tug cov ntaub ntawv 220 R - 220 ohms txhais tau tias; 3K2 - txhais tau tias 3200 ohms; 1M1 - txhais tau tias 1100 ohms.

Xim coding ntawm lub nyob tus nqi yog thov nyob rau cov ntaubntawv povthawj ntawm lub cylindrical lub cev neeg. Lub resistors Soviet ua npav twb thov nrog ib tug offset mus rau ib sab, nws qhia tias lub keeb kwm ntawm lub seev suab. Nyob rau hauv niaj hnub hais tas los band yeej ib txwm kub los yog nyiaj bar code, thiab nws txhais tau tias tus kuj raug chav kawm ntawv (5 los yog 10 tauj ib xees). Nyob rau hauv cov kev tshwm sim hais tias cov npav muaj tsuas yog peb bands, lub neej ntawd kam chav kawm ntawv yog meant 20 feem pua. Encoding muaj 3-4 bands nyob rau hauv thawj ob nqi comprises ib nominal tus nqi, thiab lub thib peb - tus nqi ntawm cov d. Encoding ntawm 5-6 bands nyob rau hauv thawj peb lub nqi comprises lub nominal, thiab nyob rau hauv plaub - tus nqi ntawm cov d.

Tom ntej no saib kuj - ib tug nti resistor los yog ib tug SMD-resistor. Nyob rau hauv xws resistors npav yog numeric thiab leb. Nws cia li sawv: nyob rau hauv lub digital npav thawj tug lej tom qab qhia cov nominal tus nqi, thiab rau tom kawg ntawm tus xov tooj ntawm zeros; nyob rau hauv cim - tus thawj ob tug lej qhia seb denomination, thiab lub xeem ua cim - tus nqi ntawm cov d.

Nyob rau hauv lub nce mus nce los resistor , tus qauv cov ntaubntawv povthawj siv lub nominal tus nqi siv xov tooj thiab cov tsiaj ntawv ntawm lub Latin niam ntawv.