izindaba

Ngezinye izikhathi okudingekayo nje ukwakha okuthile okuthakazelisayo ukuhlanganisa izingxenye ezindala ezifanayo ngezindlela ezihlukene.[Sayantan Pal] wenze lokhu ku-matrix ye-RGB LED ethobekile, edala inguqulo encane kakhulu ngokushumeka i-WS2812b NeoPixel LED ku-PCB.
I-WS2812B edumile inobude obungu-1.6 mm, okwenzeka ukujiya kwe-PCB okuvame ukusetshenziswa kakhulu.Isebenzisa i-EasyEDA, [i-Sayantan] idizayine i-matrix engu-8×8 enephakheji elungisiwe ye-WS2812B.I-cutout encane kancane yengezwa ukuze kwakhiwe ukulingana kokungqubuzana. ye-LED, futhi amaphedi athuthelwe ngemuva kwephaneli ngaphandle kwe-cutout futhi izabelo zabo zaphetshwa.I-PCB ihlanganiswe ibheke phansi, futhi wonke amaphedi adayiswa ngesandla.Ngeshwa, lokhu kwakha ibhuloho elikhulu kakhulu, inyusa kancane ukushuba okuphelele kwephaneli, futhi ingase ingafaneleki ukukhiqizwa kusetshenziswa ukuhlanganiswa kwendawo yokukhetha nendawo.
Sesivele sibone ezinye izindlela ezifanayo zezingxenye ze-PCB zisebenzisa ama-PCB anengqimba.Abakhiqizi sebeqale nokushumeka izingxenye kuma-PCB anezingqimba eziningi.
Lokhu kufanele kube indinganiso entsha yokupakisha izinto!Usebenzisa ibhodi elishibhile elinezingqimba ezine, asiyidingi indawo yezintambo ezingaka, futhi singafakwa kalula noma sidayiswe ngokuzenzela ukuze sithathe indawo ye-DIP.Ungabeka ngaphezulu i-inductor ngqo phezulu i-chip ku-PCB yazo zonke izingxenye zayo ezingenzi lutho.Ukungqubuzana kungase kunikeze ukusekela komshini.
Ukusika kungahle kuthambekele kancane noma kumise okwefaneli futhi kwenziwe ngomsiki we-laser, ngakho-ke ukugawula ingxenye akudingi ukunemba okuningi futhi kungasetshenzwa kabusha ngokufudumeza nokuphusha ngaphandle kolunye uhlangothi.
Ebhodini elifana nesithombe esiku-athikili, angicabangi ukuthi lidinga ukudlula u-2L. Uma ungathola ama-LED kuphakheji "ye-gull-wing", ungathola kalula ingxenye eyisicaba nencane.
Ngiyazibuza ukuthi kungenzeka yini ukusebenzisa isendlalelo sangaphakathi ukuvimbela i-soldering kungqimba lwangaphandle (ngokwenza ukusika okuncane ukuze ufinyelele lezi zendlalelo, ngakho-ke i-solder izoba yi-flush ngaphezulu.
Noma sebenzisa i-solder paste kanye ne-oven.Sebenzisa u-2 mm FR4, yenza iphakethe libe ngu-1.6 mm ukushona, beka iphedi phansi elingaphakathi, gcoba i-solder paste bese uyinamathisela kuhhavini.U-Bob ungumfowabo kayihlo, futhi ama-LED ayashaywa.
Ngaphambi kokufunda sonke isiqephu sendatshana, ngicabanga ukuthi ukudluliswa kokushisa okungcono kuzoba yikona okugxilwe kulo. Yeqa ithusi lebhodi le-n-layer, vele ubeke noma yiluphi uhlobo lwesinki ngemuva, namanye amaphedi ashisayo (angazi amatemu alungile).
Ungakwazi ukugeleza kabusha i-LED kuyisekethe ephrintiwe yohlobo lwefilimu ye-polyimide (Kapton) esikhundleni sokudayisa ngesandla konke lokhu kuxhunywa ohlangothini olungemuva: ugqinsi lwama-mils angu-10 kuphela, okungenzeka lube mancane kunamabhampa adayiswe ngesandla.
Ingabe ukwakheka okujwayelekile kwalawa maphaneli akusebenzisi ama-substrates aguquguqukayo?Okwami ​​kunje.Izendlalelo ezimbili, ngakho-ke kukhona ukunqanyulwa kokushisa okuthile-okudingeka kakhulu kulawa maqoqo amakhulu.Ngine-16×16, ingakwazi ukumunca okuningi. okwamanje.
Ngincamela ukubona umuntu eklama uhlaka lwe-aluminium core PCB-an amide board adhesive layer enamathiselwe ocezwini lwe-aluminium.
Imichilo yomugqa (1-D) ivame ukutholakala kuma-substrate aguquguqukayo.Angikaze ngibone iphaneli enezinhlangothi ezimbili enalesi sakhiwo.Ingabe sikhona isixhumanisi salesi osishilo?
I-PCB ewumgogodla omncane we-aluminium iwusizo njengosinki wokushisa, kodwa isashisa: kusadingeka ukhiphe ukushisa ndawana thize ekugcineni.Ngohlelo lwami lwamandla aphezulu, ngifake i-polyimide eguquguqukayo (hhayi i-amide!) i-substrate ngqo ku-a. usinki omkhulu wokushisa one-epoxy oshisayo.Angisebenzisi izinhlobo zokunamathela ezizwela ukucindezela.Ngisho noma kukhona i-convection kuphela, kulula ukuyilahla >1W/cm^2.Ngizogijima kokuthi 4W/cm^2 imizuzu embalwa isikhathi, kodwa ngisho namaphiko ajulile angu-3 cm, azoba mnandi kakhulu.
Kulezi zinsuku, ama-PCB agqitshwe ngamapulangwe ethusi noma e-aluminium avame kakhulu.Ezintweni engizisebenzisayo mina, ngingancoma ukuthi kube lula ukuhlanganisa ithusi kune-aluminium.
Ngaphandle kokuthi uthengise idivayisi yethusi (ngendlela, uma kufanele), ngithola ukuthi i-epoxy eshisayo ebopha i-aluminium ingcono kakhulu kunethusi.Ngaqala ngafaka i-aluminium ngesisombululo se-1N NaOH cishe imizuzwana engu-30, bese ngihlanjululwa ngamanzi angcolile futhi ngiyomiswa. kahle.Ngaphambi kokuba i-oxide ikhule kabusha, iboshelwa phakathi nemizuzu embalwa.I-Damn eduze kwebhondi engabhubhi.
Ngokusebenzisa iwebhusayithi yethu namasevisi, uvumelana ngokucacile nokubekwa kwamakhukhi ethu okusebenza, ukusebenza kanye nokukhangisa.Funda kabanzi