Mgbe ụfọdụ, ihe niile ọ na-ewe iji wuo ihe na-adọrọ mmasị bụ ijikọta otu akụkụ ochie ahụ n'ụzọ dị iche iche.[Sayantan Pal] mere nke a maka matrix RGB LED dị umeala n'obi, na-emepụta ụdị ultra-thin site na itinye WS2812b NeoPixel LED na PCB.
WS2812B na-ewu ewu nwere ịdị elu nke 1.6 mm, nke na-eme ka ọkpụkpụ PCB a na-ejikarị eme ihe. Iji EasyEDA, [Sayantan] haziri 8 × 8 matrix na ngwugwu WS2812B gbanwere. A gbakwunyere obere mbelata iji mepụta esemokwu esemokwu. n'ihi na LED, na mpe mpe akwa akwagharị n'azụ panel n'èzí cutout na ọrụ ha flipped.The PCB na-agbakọta ihu ala, na ihe niile pads na-eresị site n'aka. ubé na-abawanye n'ozuzu ọkpụrụkpụ nke panel, na nwere ike ghara adabara maka mmepụta site omenala pick na ebe mgbakọ.
Anyị ahụla ụfọdụ ụzọ ndị yiri ya na PCB components site na iji PCBs oyi akwa.
Nke a kwesịrị ịbụ ọkọlọtọ ọhụrụ maka nkwakọ ngwaahịa! Iji ọnụ ala anọ-oyi akwa osisi, anyị adịghị mkpa nke ukwuu wiring ebe, na ike mfe socketed ma ọ bụ aka soldered dochie DIP.You nwere ike elu ugwu ugwu inductor ozugbo n'elu nke. mgbawa na PCB nke ihe niile na-agafe agafe. Esemokwu nwere ike inye ụfọdụ nkwado n'ibu.
Mbelata ahụ nwere ike ịnwe ntakịrị ma ọ bụ dị ka olulu ma mee ya site na onye na-egbutu laser, yabụ ịkwanye akụkụ ahụ anaghị achọ nkenke nke ọma, enwere ike ịmegharị ya site na kpo oku ma si n'akụkụ nke ọzọ pụta.
Maka osisi dị ka foto dị na isiokwu ahụ, echeghị m na ọ dị mkpa ka ọ gafere 2L. Ọ bụrụ na ị nwere ike ịnweta LEDs na ngwugwu "gull-wing", ị nwere ike nweta ngwa ngwa dị larịị na nke dị mkpa.
M na-eche ma ọ bụrụ na ọ ga-ekwe omume iji oyi akwa dị n'ime iji gbochie ire ere na oyi akwa dị n'èzí (site n'ime obere ịkpụ iji nweta ọkwa ndị a, ya mere onye na-ere ahịa ga-adịwanye mma.
Ma ọ bụ jiri tapawa solder na oven. Jiri 2 mm FR4, mee ka akpa ahụ dị omimi 1.6 mm, tinye pad na ala dị n'ime, tinye pasta solder ma tinye ya na oven.Bob bụ nwanne nna gị, na LEDs na-asọba.
Tupu ị gụọ akụkọ ahụ dum, echere m na ịnyefe ọkụ ka mma ga-abụ ihe na-elekwasị anya nke onye hacker a. Kwụsị ọla kọpa nke bọọdụ n-layer, tinye naanị ụdị ọ bụla nke ikpo ọkụ n'azụ, na ụfọdụ paịlị thermal (amaghị nke ahụ) okwu ziri ezi).
Ị nwere ike reflow LED na a polyimide (Kapton) film ụdị e biri ebi sekit kama n'aka-ire ihe niile njikọ ndị a n'azụ n'akụkụ: naanị 10 mils oké, nke nwere ike dị gịrịgịrị karịa aka-seldered bumps.
Ọ bụ na ndị nkịtị Ọdịdị nke ndị a ogwe-eji mgbanwe substrates?Mine dị ka nke a. Abụọ n'ígwé, otú e nwere ụfọdụ okpomọkụ dissipation-nke dị mkpa nke ukwuu maka ndị a ibu arrays.I nwere a 16 × 16, ọ nwere ike banye a otutu nke ugbu a.
Ọ ga-akara m mma ịhụ ka mmadụ chepụta PCB isi aluminom - akwa akwa akwa akwa nke jikọtara ya na mpempe aluminom.
A na-ahụkarị eriri Linear (1-D) n'elu ihe ndị na-agbanwe agbanwe. Ahụbeghị m panel nke nwere akụkụ abụọ nwere nhazi a. Ọ nwere njikọ na nke ị kwuru?
A mkpa aluminum isi PCB bụ bara uru dị ka a okpomọkụ sink, ma ọ ka na-akawanye na-ekpo ọkụ: ị ka mkpa dissipate okpomọkụ somewhere na end.For m elu ike n'usoro, M laminated a mgbanwe polyimide (bụghị amide!) mkpụrụ ozugbo jidesie a. nnukwu finned okpomọkụ sink na thermal epoxy.Anaghị m eji nrụgide mmetụta nrapado ụdị. Ọ bụrụgodị na e nwere nanị convection, ọ dị mfe ikpofu> 1W / cm ^ 2. M ga-agba ọsọ na 4W / cm 2 maka nkeji ole na ole na otu oge, mana ọbụlagodi na nku dị omimi nke 3 cm, ọ ga-atọ ụtọ nke ukwuu.
N'oge a, PCBs laminated na ọla kọpa ma ọ bụ aluminum mbadamba bụ nnọọ common.N'ihi na ihe m na-eji onwe m, M ga-akwado ọla kọpa- mfe ijikọ karịa aluminum.
Ọ gwụla ma ị na-ere ngwaọrụ ahụ na ọla kọpa (n'agbanyeghị, ọ bụrụ na ọ dị mma), achọpụtara m na njikọ epoxy na-ekpo ọkụ na aluminom dị mma karịa ọla kọpa. M bu ụzọ tinye aluminum na ngwọta 1N NaOH maka ihe dịka 30 sekọnd, wee kpochaa ya na mmiri deionized ma mịrị amị. tupu oxide amaliteghachi, a na-ejikọta ya n'ime nkeji ole na ole. Damn nso nso a na-apụghị imebi emebi.
Site na iji webụsaịtị na ọrụ anyị, ị kwenyere n'ụzọ doro anya na ntinye nke arụmọrụ anyị, ọrụ anyị na kuki mgbasa ozi. Mụtakwuo
Oge nzipu: Dec-30-2021