6. Integrated Circuit Court
6.1 SOIC hom ntim muaj polarity.Polarity cov cim: 1) ribbon, 2) cim, 3) notches thiab grooves, 4) bevel
6.2 LUB PACKAGE ntawm SOP lossis QFP hom muaj polarity.Polarity sau npe: 1) notch/groove labeled, 2) Ib point yog txawv (loj/puab) los ntawm lwm yam ob/peb ntsiab lus.
6.3 QFN hom encapsulation muaj polarity.Polarity qhia: 1) ib qho taw qhia txawv ntawm ob lub ntsiab lus (loj / duab), 2) hypotenuse qhia, 3) cim qhia (bar/" + "cim / dot).
7. Pob Grid Array
7.1 Ib feem polarity: notch/groove/dot/circle;Polarity ntawm PCB board: lub voj voog / dot / ntawv "1 lossis A" / bevel mark.Lub polarity point ntawm ib feem sib raug mus rau polarity point ntawm PCB.SMT tiv thaiv kev txheeb xyuas
Feem ntau, muaj 12 xim ntawm cov xim nplhaib resistors: xim av, liab, txiv kab ntxwv, daj, ntsuab, xiav, ntshav, grey, dawb, dub, kub thiab nyiaj.Ntawm lawv, thawj kaum xim sawv cev 1 ~ 9 (dub sawv cev rau 0), thiab kub thiab nyiaj feem sawv cev rau ob hom kev ua yuam kev (ntxiv lossis rho tawm 5% thiab ntxiv lossis rho tawm 10%).
Thawj ob lub xim sawv cev rau cov lej ntshiab.Piv txwv li, txiv kab ntxwv thiab dub sawv cev rau tus lej 30 (tsis hais qhov kev tawm tsam yog 30 euros), thiab lub nplhaib xim thib peb sawv cev rau tus lej ntawm xoom.Piv txwv li, yog lub nplhaib thib peb xim liab, nws txhais tau hais tias tus lej 30 yog ua raws li ob xoom, thiab tus nqi ntawm qhov kev tawm tsam no yog 30 00 euros (3k euros).
Lub nplhaib xim kawg yog kub lossis nyiaj.Piv txwv li, yog tias lub nplhaib xim kawg yog nyiaj, qhov kev tawm tsam ntawm qhov kev tawm tsam yuav nyob nruab nrab ntawm 3000 ohms ntxiv lossis rho tawm 10% (qhov tseeb ntawm qhov kev tawm tsam yuav yog qhov tseeb ntawm qhov no).
SMT capacitance polarity kev txiav txim thiab kev txheeb xyuas lub peev xwm
Capacitor feem ntau muab faib ua electrolytic capacitor thiab wafer capacitor.Cov duab ntawm electrolytic capacitor yog ib lub tog raj kheej, thiab nws lub tog raj kheej nto yog cim nrog nws cov capacitance loj, thiab nws muaj polarity (qhov ntev ko taw yog tus ncej zoo, ko taw luv yog tus ncej tsis zoo).
Ntawm qhov tod tes, wafer capacitance tsis muaj polarity.Nws yog feem ntau zoo li lub voj voog thiab cim nrog peb tus lej, ntawm cov lej thib ib thiab thib ob sawv cev tus nqi capacitance thiab tus lej thib peb sawv cev rau tus lej xoom, xws li 233, uas sawv cev rau tus nqi capacitance ntawm 23000PF lossis 0.023 micromethod.
NeoDen muab tag nrho SMT sib dhos kab kev daws teeb meem, suav nrog SMT reflow qhov cub, yoj lub tshuab siv lub tshuab, tuaj tos thiab tso tshuab, tshuab luam ntawv tshuab luam ntawv, Reflow qhov cub, PCB loader, PCB unloader, nti mounter, SMT AOI tshuab, SMT SPI tshuab, SMT X- Ray tshuab, SMT sib dhos kab khoom, PCB ntau lawm Equipment SMT spare qhov chaw, thiab lwm yam yam SMT tshuab koj xav tau, thov hu rau peb kom paub ntau ntxiv:
Hangzhou NeoDen Technology Co., Ltd
Email:info@neodentech.com
Post lub sij hawm: Nov-06-2020