Yuav ua li cas sawv npav resistors dawb lias kab txaij?

Resistor - ib qho ntawm qhov yooj yim cov ntsiab ntawm ib tug hluav taws xob Circuit Court uas muaj ib tug tsis tu ncua los yog nce mus nce los resistor thiab ua hauj lwm pab rau hloov fais tam sim no mus rau hauv ib tug voltage (los yog vice versa), lub haum ntawm hluav taws xob thiab ua ntau lwm yam kev ua hauj lwm. Qhov no passive caij yog ib feem ntawm kev ntaus ntawv. Yog li ntawd xav tias koj nyob nraum ib txog tej electrician los yog cia li ib tug lover ntawm electronics, yog pab tau rau koj thiab npav resistors kab txaij xim thiab alphanumeric los rau cov kev sib piv ntawm cov yam ntxwv ntawm qhov sib txawv Cheebtsam.

Los ntawm resistors nyob rau hauv lub kos duab

Nyob rau lub tswvyim ntawm hluav taws xob pab kiag li lawm resistor yog denoted raws li ib tug duab plaub, uas yog muab tso rau sab saum toj ntawm tsab ntawv ntawm lub Latin tsiaj ntawv R. Tom qab ib lub cim yog ib tug naj npawb, los ntawm cov uas lub caij yuav mus nrhiav tau nyob rau hauv lub specification. Sau rau hauv Circuit Court los set ntawm cov zauv uas qhia cov nominal kuj. Yog li, ib tug inscription R12 100 yuav txhais hais tias lub resistor 12 yog teem rau 100 ohms.

Ib qho tseem ceeb cov yam ntxwv ntawm lub ntsiab yog lawv lub peev xwm. Uas raug nqi ntau qhov kev xaiv no, koj khiav txoj kev pheej hmoo ntawm kev puas tsuaj tag nrho tswvyim, txawm hais tias lub ntsiab txhais ntawm resistors labeling twb ua kom raug. Cov kos duab yuav qhia tau:

• Roman numerals xws li ntawm 1 mus rau 5 watts;
• kab rov tav sawb ntawm ib tug nqi ntawm 0.5 watts;
• ib tug los yog ob tug oblique kab ntawm ib lub hwj chim ntawm 0.25 Watts thiab 0,125 feem.

"*" Sign yog muab tso rau tom qab lub serial tooj ntawm ib co resistors. Nws txhais tau hais tias saum toj no specifications yog tsuas approximate. Lub caij nyoog tseem ceeb uas koj yuav tsum tau tos rau lawv tus kheej.

alphanumeric los

Alphanumeric npav yam ntxwv ntawm cov ntsiab ntawm cov Soviet lawm, raws li tau zoo raws li ib co ntiaj teb no-class khoom. Npav resistors mas thiab domestic khoom tej zaum yuav pib li ib daim duab thiab ib lub cim. Nyob rau hauv rooj plaub no tus units xws li nram no:

• lub cim "E" los yog «R» hais tias tus nominal tus nqi qhia nyob rau hauv ohms;
• tsab ntawv "M" qhia rau peb hais tias tsis kam yog hais nyob rau hauv megohms;
• kos npe rau "K" yog complemented los ntawm tag nrho cov zauv tseem ceeb hais nyob rau hauv kiloomah.

Yog hais tias lub cim tshwm tom qab cov zauv, tag nrho cov qhov tseem ceeb yog qhia nyob rau hauv tag nrho cov chav nyob (33E = 33 ohms). Yuav kom qhia tau tias cov feem tsab ntawv teeb lej tom qab (K55 = 0,55 kilohms = 550 ohms). Yog hais tias tus kos npe rau ntawm shares, lub resistivity qhia raws li integer qhov tseem ceeb uas ib tug fractional ib feem (1M3 = 1.3 megohms).

denomination xim

Qhov ntev ntawm ib co ntawm cov "tsis kam" tsuas yog ib tug ob peb millimeters. Thov thiab saib cov tsiaj ntawv thiab ua zauv rau ntawm no caij yog tsis tau. Rau kev sib piv ntawm cov Cheebtsam yog siv npav resistors dawb lias kab txaij. Thawj ob bands yeej ib txwm lub luag hauj lwm rau cov denomination. Lwm tus neeg rau lub sij hawm thaum ib daim hlab muaj lub ntsiab lus:

• nyob rau hauv lub 3- los yog 4-txoj kab cim peb khiav ceev sij d, thiab plaub - lub neeg;
• 5-txoj kev Designations peb xim qhia cov denomination, plaub - lub d, thiab lub thib tsib - yog cov neeg;
• thib rau txoj kab qhia qhov kub coefficient ntawm kuj los yog ib tug ntawm tes cia siab rau, yog tias thicker tshaj lwm tus.

Xim bar qhia cov zauv tseem ceeb muab rau lawv. Nrog cov lus no yuav pab resistors npav qhov twg txhua ntxoov ntxoo raws li ib tug tej yam tshaj yuav, los yog daim duab. Piv txwv li, peb muaj ib tug resistor nrog ib tug liab, ntsuab, daj thiab xiav kab txaij. Decipher lub ntsiab lus, peb paub hais tias peb lub ntsej muag ib resistor ntawm 25 ohms * 10 = 250 ohms raug ntawm 25%.

ib theem zuj zus ib daim hlab

Yuav ua li cas los mus txiav txim uas sab yuav pib seev suab? Tom qab labeling resistors dawb lias kab txaij yuav decoded nyob rau hauv ob qho tib si qhia. Kom tsis txhob tsis meej pem rau hauv no, nws yog tsim nyog los nco ntsoov tej yam yooj yim cov kev cai:

1. Yog hais tias muaj yog tsuas yog peb bands, cov thawj yuav yeej ib txwm tau nyob ze rau ntawm ntug tshaj lub xeem.
2. Tus 4-txoj kev uas hais txog qhov kev nyeem ntawv taw qhia yuav tsum tau txiav txim los ntawm cov nyiaj los yog golden xim - lawv yuav nco ntsoov yuav nyob los ze zog mus rau thaum xaus.
3. Nyob rau hauv lwm yam mob, nws yuav tsum tau nyeem thiaj li mus muab tau cov nqi ntawm cov nominal series. Yog hais tias tsis yog, nws yog tsim nyog los decipher rau lwm sab.

Ib tug cais cov ntaub ntawv yog qhov chaw ntawm ib tug dub jumper ntawm lub cev. Nws txhais tau tias lub caij twb tsis muaj kuj thiab yog siv raws li ib tug jumper. Tam sim no uas koj paub yuav ua li cas mus nyeem cov npav resistors dawb lias kab txaij, thiab muaj teeb meem nrog lub ntsiab txhais ntawm lub nominal lub caij koj yuav tsis muaj.