Ngamanye amaxesha konke okufunekayo ukwakha into enika umdla kukubeka amalungu amadala afanayo kunye ngeendlela ezahlukeneyo.[Sayantan Pal] wenze oku kwi-matrix ye-RGB ethobekileyo ye-LED, ukudala inguqulelo e-ultra-thin ngokufakela i-WS2812b NeoPixel LED kwi-PCB.
I-WS2812B edumileyo inobude obuyi-1.6 mm, okwenzeka ukuba yeyona isetyenziswa kakhulu ubukhulu bePCB.Usebenzisa i-EasyEDA, [i-Sayantan] yenze i-matrix eyi-8×8 ene-packout ye-WS2812B elungisiweyo.I-cutout encinci encinci yongezwa ukudala ukuhambelana kwefriction. ngenxa ye-LED, kunye neepads zasiwa ngasemva kwipaneli ngaphandle kwe-cutout kwaye izabelo zabo zaguqulwa.I-PCB ihlanganiswe ubuso phantsi, kwaye zonke iipads zithengiswa ngesandla.Ngelishwa, oku kudala ibhulorho ye-solder enkulu, enokuthi kwandisa kancinane ubukhulu bephaneli, kwaye isenokungafaneleki kwimveliso usebenzisa i-pick yemveli kunye nendibano yendawo.
Sele sibonile ezinye iindlela ezifanayo kumacandelo e-PCB kusetyenziswa ii-PCBs ezineleya.
Oku kufuneka ibe ngumgangatho omtsha wokupakisha izinto! Ukusebenzisa ibhodi enexabiso eliphantsi elinemigangatho emine, asidingi ndawo yocingo ingako, kwaye ingafakwa lula okanye ithengiswe ngesandla ukuze ithathe indawo ye DIP. itshiphu kwi-PCB yazo zonke iinxalenye zayo ezingenziyo.Ifriction inokubonelela ngenkxaso yomatshini.
Ukusikwa kunokuthambekela kancinane okanye kubunjwe ngefunnel kwaye kwenziwe yi-laser cutter, ngoko ke ukutshata inxalenye ayifuni ukuchaneka kakhulu kwaye inokulungiswa ngokutsha ngokufudumeza kunye nokutyhala ngaphandle kwelinye icala.
Kwibhodi efana nesithombe kwinqaku, andicingi ukuba kufuneka idlule i-2L. Ukuba unokufumana ii-LED kwiphakheji "ye-gull-wing", unokufumana lula icandelo elicaba kunye nelincinci.
Ndiyazibuza ukuba ngaba kunokwenzeka ukusebenzisa umaleko wangaphakathi ukukhusela i-soldering kwi-layer yangaphandle (ngokwenza ukusika okuncinci ukufikelela kula maleko, ngoko i-solder iya kuba yinto egungxulwayo ngakumbi.
Okanye sebenzisa i-solder paste kunye ne-oven.Sebenzisa i-2 mm FR4, yenza ipokotho ibe yi-1.6 mm ubunzulu, ubeke i-pad ezantsi ezantsi, sebenzisa i-solder paste kwaye uyincamathele kwi-oven.Bob ngumzalwana kayihlo, kwaye ii-LED ziyagungxula.
Ngaphambi kokuba ndifunde lonke inqaku, ndicinga ukuba ukuhanjiswa kobushushu kuya kuba kugxininiso lwale hacker.Tqa ubhedu lwebhodi ye-n-layer, ubeke nje naluphi na uhlobo lwe-heat sink ngasemva, kunye neepads ezishisayo (andazi isigama esichanekileyo).
Uyakwazi ukuhambisa kwakhona i-LED kwi-polyimide (Kapton) ifilimu yohlobo lwesekethe eprintiweyo endaweni yokuthengisa ngesandla zonke ezi ziqhagamshelo kwicala elingasemva: kuphela i-10 mils ubukhulu, enokuthi ibe ncinane kuneziqhuma ezithengiswa ngesandla.
Ngaba ulwakhiwo oluqhelekileyo lwezi panels alusebenzisi isubstrates eziguquguqukayo? Eyam ifana nale. Imigangatho emibini, ngoko kukho ukuchithwa kobushushu-okufuneka kakhulu kwezi zinto zinkulu. Ndine 16×16, inokufunxa kakhulu yangoku.
Ndingathanda ukubona umntu eyila i-aluminiyam engundoqo yePCB-ibhodi ye-amide encamathelayo umaleko encamathele kwisiqwenga se-aluminiyam.
Imicu yomgca (1-D) ixhaphake ngokufumaneka kwiisubstrates eziguquguqukayo.Andikhange ndiyibone ipaneli ene-dimensional-dimensional enolu lwakhiwo.Ingaba ikhona ikhonkco kule uyikhankanyileyo?
I-PCB encinci ye-aluminiyam iluncedo njengendawo yokutshisa ubushushu, kodwa iyaqhubeka ishushu: usafuna ukukhupha ubushushu kwenye indawo ekugqibeleni. Kuluhlu lwam lwamandla aphezulu, ndilamine i-polyimide eguquguqukayo (hayi i-amide!) i-substrate ngqo kwi-a Isinki enkulu yobushushu ephothiweyo ene-epoxy eshushu.Andisebenzisi iintlobo zokuncamathelisa ezibuthathaka kuxinzelelo.Nokuba kukho i-convection kuphela, kulula ukuyilahla >1W/cm^2.Ndiza kubaleka ku-4W/cm^2 imizuzu embalwa ixesha, kodwa nokuba yi-3 cm ubunzulu bamaphiko, iya kuba mnandi kakhulu.
Kule mihla, ii-PCB ezilayitiweyo kwiibhodi zobhedu okanye ze-aluminium zixhaphake kakhulu. Kwizinto endizisebenzisayo, ndingacebisa ubhedu olulula ukubopha kune-aluminium.
Ngaphandle kokuba uthengisa isixhobo kwi-copper (ngendlela, ukuba kufanelekile), ndifumanisa ukuba i-epoxy eshushu yokudibanisa kwi-aluminium ingcono kakhulu kunobhedu.Ndaqala ndafaka i-aluminium kunye nesisombululo se-1N NaOH malunga nemizuzwana ye-30, emva koko ihlanjululwe ngamanzi adibeneyo kwaye yomiswe. Ngokucokisekileyo.Ngaphambi kokuba i-oksidi ikhule kwakhona, ibophelelwe kwimizuzu embalwa.Damn kufuphi nebhondi engapheliyo.
Ngokusebenzisa iwebhusayithi yethu kunye neenkonzo, uvumelana ngokucacileyo nokubekwa kwenkqubo yethu, ukusebenza kunye neekuki zentengiso. Funda ngakumbi
Ixesha lokuposa: Dec-30-2021
