6. Integrated Circuit
6.1 SOIC mhando yekurongedza ine polarity.Polarity mamaki :1) ribhoni, 2) chiratidzo, 3) notches uye grooves, 4) bevel
6.2 PACKAGE yeSOP kana QFP mhando ine polarity.Polarity yakanyorwa :1) notch/groove yakanyorwa, 2) Imwe poindi yakasiyana (saizi/chimiro) kubva kune mamwe maviri/mapoinzi matatu.
6.3 QFN mhando encapsulation ine polarity.Polarity inoratidzwa: 1) imwe pfungwa yakasiyana nedzimwe mbiri (hukuru / chimiro), 2) hypotenuse inoratidzwa, 3) chiratidzo chinoratidzwa (bha /" + "chiratidzo / dot).
7. Bhora Grid Array
7.1 Chikamu polarity: notch/groove/dot/denderedzwa;Polarity yePCB board: denderedzwa/doti/tsamba “1 kana A”/bevel mark.Iyo polarity poindi yechikamu inoenderana neiyo polarity point paPCB.SMT kuramba identification nzira
Kazhinji, kune 12 mavara eruvara mhete resistors: brown, tsvuku, orenji, yero, yegirini, yebhuruu, yepepuru, grey, chena, nhema, goridhe nesirivha.Pakati pawo, mavara gumi ekutanga anomiririra 1 ~ 9 (dema rinomiririra 0), uye goridhe nesirivha zvakateerana zvinomiririra marudzi maviri ekukanganisa (pamwe kana kubvisa 5% uye kuwedzera kana kubvisa gumi muzana).
Mavara maviri ekutanga anomiririra Mverengo dzakachena.Semuenzaniso, orenji nedema zvinomiririra nhamba makumi matatu (kwete kuti kuramba i30 euros), uye yechitatu mhete yeruvara inomiririra nhamba yemazero.Semuenzaniso, kana mhete yechitatu yeruvara yakatsvuka, zvinoreva nhamba ye30 inoteverwa nemazero maviri, uye kukosha kwekupikisa uku ndiko 30 00 euros (3k euros).
Mhete yekupedzisira yeruvara ingave yegoridhe kana sirivha.Semuenzaniso, kana mhete yekupedzisira yemuvara iri sirivheri, kushorwa kwekupokana kuchave pakati pe3000 ohms plus kana minus 10% (kupikisa kwechokwadi kwekupokana kuchave chero kukosha chaiko mukati meiyi chiyero).
SMT capacitance polarity kutonga uye kugona kugona
Capacitor inonyanya kukamurwa kuita electrolytic capacitor uye wafer capacitor.Chimiro cheelectrolytic capacitor icylinder, uye humburumbira hwayo hunoratidzwa nehukuru hwayo hwekugona, uye ine polarity (rutsoka rurefu ndiro danda rakanaka, tsoka pfupi ndiyo danda risina kunaka).
Kune rimwe divi, wafer capacitance haina polarity.Inowanzo kuumbwa sedenderedzwa uye yakanyorwa neNhamba nhatu, pakati peiyo nhamba yekutanga neyechipiri inomiririra kukosha kwekugona uye nhamba yechitatu inomiririra nhamba yezero, senge 233, inomiririra capacitance kukosha kwe23000PF kana 0.023 micromethod.
NeoDen inopa yakazara SMT mutsetse mhinduro, kusanganisira SMT reflow oven, wave soldering muchina, pick nekuisa muchina, solder paste printer, Reflow oven, PCB loader, PCB unloader, chip mounter, SMT AOI muchina, SMT SPI muchina, SMT X- Ray muchina, SMT mutsara mutsara mudziyo, PCB yekugadzira Equipment SMT spare parts, etc chero mhando dzeSMT michina yaungade, ndapota taura nesu kuti uwane rumwe ruzivo:
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Nguva yekutumira: Nov-06-2020