Smd-resistors: description, calaamadeynta

Smd (Dhulka Fardoolayda Devices) turjumay in English ka dhigan tahay "qalab Jaha dushiisa." Smd-qaybood toban jeer ka yar oo size iyo miisaanka badan qaybaha caadiga ah, oon ku gaari karo cufnaanta sare oo sii kordhaya on a guddiga circuit daabacay qalabka. Maalmahan korantada horumariyo xawaaraha wayn, mid ka mid ah meelaha - waa in la yareeyo dhinacyada guud iyo miisaanka ah qalabka. Smd-qaybood - sabab u ah ay size, kharash yar, tayo sare leh - helay faafinta weyn oo sii kordheysa bedelay xubno classical la Xarkaha horseedka.

sawir hoose wuxuu muujinayaa-smd resistors waxaa lagu dhejiyay on PCB ah. Waxaad arki kartaa in, ay sabab u tahay baaxadda yar oo xubno ka ah gaari cufnaanta ah xirxirida sare. Sida caadiga ah waxyaabaha la geliyo galay godadkii in guddida iyo ku-smd resistors waxaa soldered meesha on dusha sare ee waddooyinka daabacay xiriir guddiga circuit (Piglet), kaas oo sidoo kale nayaa ee design iyo shirkii aaladaha radio-electronic. Iyada oo awood u leh inay Buur lifaaqa ka mid ah qaybaha radio waxaa suuragal ka dhigay in ay soo saaraan loox wareeg daabacan ma aha oo kaliya laba geesoodka ah, laakiin sidoo kale multi-israac, dusha u eg cake lakabka ah.

soo saaray habka soo socda ee wax soo saarka warshadaha, kabida smd-qaybood: guddiga track inaad la xiriirto Alxan ka codsatay thermopaste gaar ah (ka daadanayo waxaa ku qasmay budada Alxan), ka dib markii taas oo robot uu leeyahay meel ee xubno la doonayo ay ka mid yihiin smd-resistors. Details hogaansamo Jinka Alxan waxa lagu meeleeyey mas'uul gaar ah foorno halkaas oo la kululeeyo si heer kulka la doonayo ee Alxan ah dhalaalayaa in koollada ka baxa dheecaan. Sayidka faahfaahinta ka heli kursiga. Intaas ka dib, PCB waa lagaa saarayaa ka foornada oo la qaboojiyey.

Waayo, qaybaha kabida, nooca smd guriga u baahan doontaa qalabka soo socda: walxihii, mudac, kelbed, weynaynaya silingaha galaas irbad qaro weyn, bir ah, kabida leh tip a ganaax, saldhiga, kabida hawada kulul. Of isticmaalo loo baahan yahay Alxan, ka daadanayo oo dareere ah. Waa suurad wacan, dabcan, u isticmaalaan saldhig Laxaamaddu, laakiin haddii aadan samayn, waxaad ka heli kartaa by bir ah, kabida. Marka kabida, wax ugu weyn ee - si looga hortago kulayl dheeraad ah qaybaha iyo PCB ah. Si xubno ma guurto iyo ma xayiran in Micida birta, kabida, a, waa in ay la cadaadisay on board irbadda.

Smd-resistors soo bandhigayaa arrin tiro balaadhan oo ah qiimaha magacaaban ka mid soddon Ohm megohm. heerkulka Operating of resistors kala duwan -550 ° C si + 1250 ° C. Power smd-resistor gaadho 1W. By kordhinaya awooda kordhin dhinacyada guud. Tusaale ahaan, resistors smd awood 0.05 W uu leeyahay cabbirada 0.6 * 0.3 * 0.23 mm iyo awoodda ah 1 W - 3.2 * 6.35 * 0.55 mm.

Calaamadaynta resistors kuwan kartaa ahaan saddex nooc: saddex lambar, afar-god iyo saddex characters,

- Labada lambar ee koobaad ayaa tilmaamaya qiimaha ugu qiimaha resistor in ohms, iyo la soo dhaafay - tirada eber. Tusaale ahaan, sixitaanka at resistor ah 102 1000 ohms ama 1k.

- Saddexda lambar koowaad ee resistor waxay muujinaysaa qiimaha magacaaban ee ohms, iyo kan ugu dambeeya - tirada eber. Tusaale ahaan, sixitaanka resistor ee 5302 waa 53 kohm.

- Labada characters marka hore waxay muujinayaan qiimaha resistor in ohms qiimaha magacaaban, qaaday miiska kore ka, iyo qof ee la soo dhaafay muujinaysaa qiimaha multiplier a: S = 10-2; R = 10-1; B = 10; C = 102; D = 103; E = 104; F = 105. Tusaale ahaan, sixitaanka 11c resistor waa 12.7 kohm.