{"id":4880,"date":"2026-04-30T07:07:36","date_gmt":"2026-04-30T07:07:36","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4880"},"modified":"2026-04-30T07:07:38","modified_gmt":"2026-04-30T07:07:38","slug":"how-to-design-a-pcb-so-a-manufacturer-wont-reject-it","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/cs\/how-to-design-a-pcb-so-a-manufacturer-wont-reject-it\/","title":{"rendered":"Jak navrhnout desku plo\u0161n\u00fdch spoj\u016f (aby ji v\u00fdrobce neodm\u00edtl)"},"content":{"rendered":"<p>Pokud jste se n\u011bkdy pod\u00edvali na desku plo\u0161n\u00fdch spoj\u016f a \u0159ekli si, \u017ee tohle bych nikdy nedok\u00e1zal. M\u016f\u017eete.<\/p>\n\n\n\n<p>Ne okam\u017eit\u011b. Ne dokonale hned napoprv\u00e9. Ale rozhodn\u011b se m\u016f\u017eete nau\u010dit, jak navrhnout desku plo\u0161n\u00fdch spoj\u016f, kter\u00e1 bude fungovat, bude vyrobena bez probl\u00e9m\u016f a nezm\u011bn\u00ed se v t\u00fddenn\u00ed no\u010dn\u00ed m\u016fru p\u0159i lad\u011bn\u00ed.<\/p>\n\n\n\n<p>A up\u0159\u00edmn\u011b \u0159e\u010deno, nejt\u011b\u017e\u0161\u00ed nen\u00ed umis\u0165ov\u00e1n\u00ed d\u00edl\u016f ani trasov\u00e1n\u00ed stop. Je to v\u011bd\u011bt, co ud\u011blat jako prvn\u00ed, co p\u0159ekontrolovat a co v\u00e1s pozd\u011bji kousne, kdy\u017e to budete ignorovat.<\/p>\n\n\n\n<p>Toto je praktick\u00fd n\u00e1vod. Tak, jak bych to vysv\u011btlil kamar\u00e1dovi, kter\u00fd m\u00e1 hotov\u00e9 sch\u00e9ma a te\u010f chce m\u00edt v ruce skute\u010dnou desku.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-0-what-designing-a-circuit-board-actually-includes\">Co vlastn\u011b zahrnuje \u201cnavrhov\u00e1n\u00ed desky s plo\u0161n\u00fdmi spoji\u201d?<\/h2>\n\n\n\n<p>Lid\u00e9 \u0159\u00edkaj\u00ed \u201c<a href=\"https:\/\/flj-pcb.com\/cs\/pcb-design\/\">N\u00e1vrh desek plo\u0161n\u00fdch spoj\u016f<\/a>\u201d jako by to byl jeden krok. Je to sp\u00ed\u0161e \u0159et\u011bzec.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Definice po\u017eadavk\u016f a omezen\u00ed<\/li>\n\n\n\n<li>Vytvo\u0159en\u00ed sch\u00e9matu (logick\u00e9ho obvodu)<\/li>\n\n\n\n<li>P\u0159i\u0159azen\u00ed otisk\u016f (fyzick\u00fdch bal\u00ed\u010dk\u016f)<\/li>\n\n\n\n<li>Vytvo\u0159en\u00ed obrysu desky a mechanick\u00fdch omezen\u00ed<\/li>\n\n\n\n<li>Um\u00edst\u011bn\u00ed komponent se z\u00e1m\u011brem<\/li>\n\n\n\n<li>Trasy a letadla<\/li>\n\n\n\n<li>Prov\u00e1d\u011bn\u00ed kontrol pravidel n\u00e1vrhu a elektrick\u00fdch kontrol<\/li>\n\n\n\n<li>Generov\u00e1n\u00ed v\u00fdrobn\u00edch soubor\u016f<\/li>\n\n\n\n<li>Nechte si jej vyrobit a smontovat<\/li>\n\n\n\n<li>Test, oprava, opakov\u00e1n\u00ed<\/li>\n<\/ol>\n\n\n\n<p>Kroky 2 a\u017e 8 m\u016f\u017eete prov\u00e9st v n\u00e1stroji PCB CAD. Zbytek je, no. Skute\u010dn\u00fd \u017eivot.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-1-step-1-start-with-clear-requirements-this-saves-you-later\">Krok 1: Za\u010dn\u011bte s jasn\u00fdmi po\u017eadavky (pozd\u011bji v\u00e1m to u\u0161et\u0159\u00ed pr\u00e1ci)<\/h2>\n\n\n\n<p>Ne\u017e otev\u0159ete KiCad, Altium nebo cokoli jin\u00e9ho, co pou\u017e\u00edv\u00e1te, napi\u0161te si jednoduch\u00fd kontroln\u00ed seznam.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Co d\u011bl\u00e1 rada, jednou v\u011btou?<\/li>\n\n\n\n<li>Rozsah vstupn\u00edho nap\u011bt\u00ed? Riziko p\u0159ep\u00f3lov\u00e1n\u00ed?<\/li>\n\n\n\n<li>Maxim\u00e1ln\u00ed proud na libovoln\u00e9 kolejnici?<\/li>\n\n\n\n<li>Jak velk\u00e1 m\u016f\u017ee b\u00fdt deska?<\/li>\n\n\n\n<li>Jak se bude montovat? \u0160rouby, stoj\u00e1nky, svorky?<\/li>\n\n\n\n<li>Jak\u00fdm konektor\u016fm a kde je t\u0159eba \u010delit?<\/li>\n\n\n\n<li>N\u011bjak\u00e9 citliv\u00e9 sign\u00e1ly? Vysokorychlostn\u00ed, analogov\u00e9, RF, n\u00edzk\u00fd \u0161um?<\/li>\n\n\n\n<li>\u017divotn\u00ed prost\u0159ed\u00ed. Teplo, vibrace, vlhkost?<\/li>\n\n\n\n<li>C\u00edlov\u00e9 n\u00e1klady a mno\u017estv\u00ed<\/li>\n<\/ul>\n\n\n\n<p>Zd\u00e1 se to nudn\u00e9, ale v\u0161echno to utv\u00e1\u0159\u00ed. T\u0159eba. A\u0165 u\u017e pot\u0159ebujete 2 nebo 4 vrstvy. Zda mohou b\u00fdt va\u0161e stopy hrub\u00e9 a \u0161etrn\u00e9, nebo zda pot\u0159ebujete \u0159\u00edzenou impedanci.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-2-step-2-capture-the-schematic-and-make-it-readable\">Krok 2: Zachycen\u00ed sch\u00e9matu (a jeho \u010ditelnost)<\/h2>\n\n\n\n<p>DPS za\u010d\u00edn\u00e1 jako sch\u00e9ma. I kdy\u017e je v\u00e1\u0161 obvod jednoduch\u00fd, ud\u011blejte ho spr\u00e1vn\u011b.<\/p>\n\n\n\n<p>N\u011bkolik pravidel, kter\u00e1 zn\u00ed otravn\u011b, ale usnad\u0148uj\u00ed lad\u011bn\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u0161ude pou\u017e\u00edvejte s\u00ed\u0165ov\u00e9 \u0161t\u00edtky m\u00edsto dlouh\u00fdch dr\u00e1t\u016f<\/li>\n\n\n\n<li>Seskupen\u00ed podle funkce: nap\u00e1jen\u00ed, MCU, senzory, konektory<\/li>\n\n\n\n<li>Odd\u011blovac\u00ed kondenz\u00e1tory um\u00edst\u011bte tak\u00e9 vedle nap\u00e1jec\u00edch v\u00fdvod\u016f integrovan\u00e9ho obvodu ve sch\u00e9matu, nejen pozd\u011bji na desce plo\u0161n\u00fdch spoj\u016f.<\/li>\n\n\n\n<li>P\u0159idejte nyn\u00ed testovac\u00ed body. Pozd\u011bji si pod\u011bkujete<\/li>\n\n\n\n<li>Hodnoty a \u010d\u00edsla d\u00edl\u016f vkl\u00e1dejte do pol\u00ed, ne do n\u00e1hodn\u00fdch pozn\u00e1mek.<\/li>\n<\/ul>\n\n\n\n<p>Tak\u00e9 se nespol\u00e9hejte na to, \u017ee si pamatujete v\u00fdvody. P\u0159i zapojov\u00e1n\u00ed symbol\u016f se v\u017edy \u0159i\u010fte datasheetem. Zejm\u00e9na u regul\u00e1tor\u016f a USB a v\u0161eho, co m\u00e1 v\u00edce zemn\u00edc\u00edch nebo exponovan\u00fdch blok\u016f.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"566\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-schematic.webp\" alt=\"PCB schematic\" class=\"wp-image-4882\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-schematic.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-schematic-300x212.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-schematic-768x543.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-schematic-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-3-a-quick-sanity-pass-before-moving-on\">Rychl\u00fd pr\u016fchod zdrav\u00fdm rozumem p\u0159ed pokra\u010dov\u00e1n\u00edm<\/h3>\n\n\n\n<p>Zeptejte se sami sebe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>M\u00e1m v p\u0159\u00edpad\u011b pot\u0159eby pullupy a pulldowny?<\/li>\n\n\n\n<li>M\u00e1m pro LED diody rezistory omezuj\u00edc\u00ed proud?<\/li>\n\n\n\n<li>Zahrnul jsem programovac\u00ed nebo ladic\u00ed hlavi\u010dky, pokud se jedn\u00e1 o desku s mikrokontrol\u00e9rem?<\/li>\n\n\n\n<li>Je na vstupu nap\u00e1jen\u00ed ochrana? Minim\u00e1ln\u011b pojistka nebo polyf\u00fazn\u00ed pojistka, mo\u017en\u00e1 TVS dioda, pokud je to extern\u00ed konektor.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-4-step-3-choose-components-that-exist-in-real-life\">Krok 3: Vyberte komponenty, kter\u00e9 existuj\u00ed v re\u00e1ln\u00e9m \u017eivot\u011b<\/h2>\n\n\n\n<p>Na tomto m\u00edst\u011b um\u00edr\u00e1 mnoho prvn\u00edch desek. Ve sch\u00e9matu funguje jak\u00e1koli sou\u010d\u00e1stka. Ve v\u00fdrob\u011b funguj\u00ed pouze d\u00edly s dobr\u00fdmi rozm\u011bry a dostupnost\u00ed.<\/p>\n\n\n\n<p>P\u0159i v\u00fdb\u011bru d\u00edl\u016f sledujte:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Velikost pouzdra, kter\u00e9 m\u016f\u017eete skute\u010dn\u011b p\u00e1jet (0603 je v po\u0159\u00e1dku, 0402 je nep\u0159\u00edjemn\u00e9, QFN je provediteln\u00e9, ale vy\u017eaduje p\u00e9\u010di).<\/li>\n\n\n\n<li>Dostupnost dodavatelsk\u00e9ho \u0159et\u011bzce. Sna\u017ete se nevyb\u00edrat jednoro\u017e\u010d\u00ed d\u00edly<\/li>\n\n\n\n<li>Jmenovit\u00e9 hodnoty nap\u011bt\u00ed a proudu s rezervou<\/li>\n\n\n\n<li>Informace o konektorech naleznete na mechanick\u00e9m v\u00fdkresu. Neodhadujte<\/li>\n<\/ul>\n\n\n\n<p>Pokud stav\u00edte n\u011bco, co byste mohli pozd\u011bji doobjednat, vyb\u00edrejte d\u00edly z dob\u0159e podporovan\u00fdch \u0159ad. Va\u0161e budouc\u00ed j\u00e1 se bude m\u00e9n\u011b zlobit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-5-step-4-footprints-the-place-where-mistakes-get-expensive\">Krok 4: Otisky. M\u00edsto, kde se chyby prodra\u017e\u00ed<\/h2>\n\n\n\n<p>Ka\u017ed\u00fd schematick\u00fd symbol pot\u0159ebuje otisk, kter\u00fd p\u0159esn\u011b odpov\u00edd\u00e1 fyzick\u00e9 sou\u010d\u00e1sti.<\/p>\n\n\n\n<p>A pr\u00e1v\u011b v t\u00e9to \u010d\u00e1sti si za\u010d\u00e1te\u010dn\u00edci omylem objednaj\u00ed deset m\u011bd\u011bn\u00fdch podt\u00e1ck\u016f.<\/p>\n\n\n\n<p>Postupujte opatrn\u011b:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Shodn\u00fd po\u010det pin\u016f a vzd\u00e1lenost mezi nimi<\/li>\n\n\n\n<li>Odpov\u00eddaj\u00edc\u00ed varianta balen\u00ed (SOIC nen\u00ed TSSOP, QFN se dod\u00e1v\u00e1 ve v\u00edce velikostech).<\/li>\n\n\n\n<li>Zkontrolujte zna\u010dky polarity diod, elektrolyt\u016f, v\u00fdvodu IC 1.<\/li>\n\n\n\n<li>Ov\u011b\u0159en\u00ed otvor\u016f pro n\u00e1dvo\u0159\u00ed a p\u00e1jec\u00ed masku, pokud jste vytvo\u0159ili vlastn\u00ed otisk.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-6-i-like-to-do-this-one-simple-check\">R\u00e1d prov\u00e1d\u00edm tuto jednoduchou kontrolu<\/h3>\n\n\n\n<p>Vytiskn\u011bte plo\u0161n\u00fd spoj 1:1 na pap\u00edr a um\u00edst\u011bte na n\u011bj skute\u010dn\u00e9 sou\u010d\u00e1stky. Zejm\u00e9na konektory.<\/p>\n\n\n\n<p>Zn\u00ed to jako low tech. Funguje to.<\/p>\n\n\n\n<p>Ne\u017e p\u0159ejdete k dal\u0161\u00edmu kroku, je nutn\u00e9 prov\u00e9st d\u016fkladnou anal\u00fdzu. <a href=\"https:\/\/resources.pcb.cadence.com\/blog\/pcb-inspection-checklist-before-and-after-fab\" rel=\"noreferrer noopener\" target=\"_blank\">Kontrola desek plo\u0161n\u00fdch spoj\u016f<\/a> abyste se ujistili, \u017ee v\u0161echny otisky a um\u00edst\u011bn\u00ed jsou p\u0159esn\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-7-step-5-set-up-the-board-outline-and-layer-stack\">Krok 5: Nastaven\u00ed obrysu desky a z\u00e1sobn\u00edku vrstev<\/h2>\n\n\n\n<p>Nyn\u00ed p\u0159ejd\u011bte k rozvr\u017een\u00ed desky plo\u0161n\u00fdch spoj\u016f.<\/p>\n\n\n\n<p>Za\u010dn\u011bte s:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tvar a rozm\u011bry desky<\/li>\n\n\n\n<li>Mont\u00e1\u017en\u00ed otvory a ochrann\u00e9 prostory<\/li>\n\n\n\n<li>Omezen\u00ed um\u00edst\u011bn\u00ed konektor\u016f (USB na okraji atd.)<\/li>\n\n\n\n<li>Rozhodnut\u00ed o po\u010dtu vrstev<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"510\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-stackup.webp\" alt=\"PCB stackup\" class=\"wp-image-4881\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-stackup.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-stackup-300x191.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-stackup-768x490.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/04\/PCB-stackup-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-8-2-layers-vs-4-layers\">2 vrstvy vs 4 vrstvy<\/h3>\n\n\n\n<p>Pro v\u011bt\u0161inu hobby a mnoho komer\u010dn\u00edch desek jsou 2 vrstvy v po\u0159\u00e1dku.<\/p>\n\n\n\n<p>Mo\u017en\u00e1 v\u0161ak budete cht\u00edt 4 vrstvy, pokud:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>M\u00e1te vysokorychlostn\u00ed sign\u00e1ly (USB 2.0, rychl\u00e9 hrany, DDR atd.)<\/li>\n\n\n\n<li>Pot\u0159ebujete lep\u0161\u00ed referenci zem\u011b a m\u00e9n\u011b \u0161umu<\/li>\n\n\n\n<li>Fr\u00e9zujete hust\u00e9 sou\u010d\u00e1stky, jako jsou BGA nebo spousta d\u00edl\u016f s jemnou rozte\u010d\u00ed.<\/li>\n\n\n\n<li>Chcete, aby integrita nap\u00e1jen\u00ed byla jednodu\u0161\u0161\u00ed<\/li>\n<\/ul>\n\n\n\n<p>B\u011b\u017en\u00fd \u010dty\u0159vrstv\u00fd z\u00e1sobn\u00edk je:<\/p>\n\n\n\n<p>Horn\u00ed sign\u00e1l, zemn\u00edc\u00ed rovina, nap\u00e1jec\u00ed rovina, spodn\u00ed sign\u00e1l.<\/p>\n\n\n\n<p>Nen\u00ed povinn\u00e9. Ale je to p\u011bkn\u00e9 v\u00fdchoz\u00ed nastaven\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-9-step-6-place-components-like-you-mean-it\">Krok 6: Um\u00edst\u011bte komponenty tak, jak to mysl\u00edte v\u00e1\u017en\u011b<\/h2>\n\n\n\n<p>Um\u00edst\u011bn\u00ed nen\u00ed dekorace. Je to elektrick\u00fd v\u00fdkon, vyrobitelnost a rozumnost.<\/p>\n\n\n\n<p>Zde je praktick\u00e9 po\u0159ad\u00ed um\u00edst\u011bn\u00ed, kter\u00e9 funguje:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Nejd\u0159\u00edve um\u00edst\u011bte konektory a \u010d\u00e1sti u\u017eivatelsk\u00e9ho rozhran\u00ed (tla\u010d\u00edtka, LED diody, displeje).<\/li>\n\n\n\n<li>Um\u00edst\u011bte \u010d\u00e1st o p\u0159\u00edkonu a regulaci v\u00fdkonu vedle<\/li>\n\n\n\n<li>Um\u00edst\u011bte hlavn\u00ed \u0159\u00eddic\u00ed jednotku nebo hlavn\u00ed IC<\/li>\n\n\n\n<li>Um\u00edst\u011bte kolem n\u011bj podp\u016frn\u00e9 d\u00edly (krystal, odd\u011blovac\u00ed, zav\u00e1d\u011bc\u00ed odpory).<\/li>\n\n\n\n<li>Um\u00edst\u011bn\u00ed funk\u010dn\u00edch blok\u016f: senzory, ovlada\u010de, opera\u010dn\u00ed zesilova\u010de atd.<\/li>\n\n\n\n<li>Um\u00edst\u011bn\u00ed testovac\u00edch bod\u016f a programovac\u00ed hlavi\u010dky<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-10-placement-tips-that-prevent-noise-and-weirdness\">Tipy pro um\u00edst\u011bn\u00ed, kter\u00e9 zabra\u0148uj\u00ed hluku a podivnostem<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Udr\u017eujte <a href=\"https:\/\/resources.altium.com\/p\/bypass-and-decoupling-capacitor-placement-guidelines\" target=\"_blank\" rel=\"noreferrer noopener\">odd\u011blovac\u00ed kondenz\u00e1tory<\/a> velmi bl\u00edzko nap\u00e1jec\u00edch pin\u016f integrovan\u00e9ho obvodu. Ne \u201ctak trochu bl\u00edzko\u201d. T\u0159eba hned vedle n\u011bj.<\/li>\n\n\n\n<li>Udr\u017eujte analogov\u00e9 sekce mimo sp\u00ednac\u00ed regul\u00e1tory<\/li>\n\n\n\n<li>Udr\u017eujte silnoproud\u00e9 smy\u010dky t\u011bsn\u00e9. Kr\u00e1tk\u00e9 a \u0161irok\u00e9 stopy, minim\u00e1ln\u00ed plocha smy\u010dky<\/li>\n\n\n\n<li>Udr\u017eujte krystaly bl\u00edzko MCU a vedete tyto stopy kr\u00e1tce, pokud mo\u017eno bez pr\u016fchodek.<\/li>\n\n\n\n<li>Ponechte si prostor pro sm\u011brov\u00e1n\u00ed. Pokud je v\u0161e nacpan\u00e9 od kraje ke kraji, st\u00e1v\u00e1 se fr\u00e9zov\u00e1n\u00ed r\u00e9busem, kter\u00fd ztrat\u00edte.<\/li>\n<\/ul>\n\n\n\n<p>A tak\u00e9 p\u0159em\u00fd\u0161lejte o mont\u00e1\u017ei. Pokud se deska bude montovat v tov\u00e1rn\u011b, je d\u016fle\u017eit\u00e9, aby byla orientovan\u00e1 a m\u011bla dostate\u010dnou v\u016fli pro v\u00fdb\u011br a um\u00edst\u011bn\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-11-step-7-define-design-rules-early-clearance-widths-via-sizes\">Krok 7: V\u010dasn\u00e9 stanoven\u00ed pravidel pro navrhov\u00e1n\u00ed (v\u016fle, \u0161\u00ed\u0159ky, velikosti)<\/h2>\n\n\n\n<p>V\u00e1\u0161 n\u00e1stroj pro v\u00fdrobu desek plo\u0161n\u00fdch spoj\u016f mus\u00ed zn\u00e1t <a href=\"https:\/\/networkpcb.com\/manufacturing\/design-limit\" rel=\"noreferrer noopener\" target=\"_blank\">v\u00fdrobn\u00ed limity<\/a>.<\/p>\n\n\n\n<p>Typick\u00e9 bezpe\u010dn\u00e9 v\u00fdchoz\u00ed hodnoty pro mnoho tov\u00e1ren:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0160\u00ed\u0159ka stopy: 6 mil nebo 8 mil pro sign\u00e1ly (\u0161ir\u0161\u00ed je jednodu\u0161\u0161\u00ed)<\/li>\n\n\n\n<li>Sv\u011btl\u00e1 v\u00fd\u0161ka: 6 mil nebo 8 mil<\/li>\n\n\n\n<li>Vrt\u00e1k: 0,3 mm s pr\u016fm\u011brem 0,6 mm (zkontrolujte si svou tov\u00e1rnu)<\/li>\n\n\n\n<li>Roz\u0161\u00ed\u0159en\u00ed p\u00e1jec\u00ed masky: v\u00fdchoz\u00ed nastaven\u00ed fab je obvykle v po\u0159\u00e1dku<\/li>\n<\/ul>\n\n\n\n<p>Ale neh\u00e1dejte. Vyu\u017eijte mo\u017enost\u00ed v\u00fdrobce. Ka\u017ed\u00e1 tov\u00e1rna m\u00e1 str\u00e1nku s mo\u017enostmi. Pokud se chyst\u00e1te vyr\u00e1b\u011bt levn\u00e9 prototypy, bu\u010fte konzervativn\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-12-trace-width-for-current\">\u0160\u00ed\u0159ka stopy pro proud<\/h3>\n\n\n\n<p>Sign\u00e1ly mohou b\u00fdt tenk\u00e9. V\u00fdkonov\u00e9 stopy by \u010dasto m\u011bly b\u00fdt \u0161ir\u0161\u00ed.<\/p>\n\n\n\n<p>Pokud m\u00e1te na stop\u011b 1A nebo v\u00edce, neprovozujte ji na 6 mil a doufejte. Pou\u017eijte <a href=\"https:\/\/tracewidthcalculator.com\/differential-impedance-calculator\" rel=\"noreferrer noopener\" target=\"_blank\">kalkula\u010dka \u0161\u00ed\u0159ky stopy<\/a> nebo ji prost\u011b ud\u011blejte \u0161irokou a kr\u00e1tkou. Nebo nalijte m\u011b\u010f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-13-step-8-route-the-board-and-try-to-keep-it-calm\">Krok 8: Sm\u011brov\u00e1n\u00ed tabule (a snaha o zachov\u00e1n\u00ed klidu)<\/h2>\n\n\n\n<p>Sm\u011brov\u00e1n\u00ed je oblast, kterou jsou lid\u00e9 bu\u010f posedl\u00ed, nebo to vzdaj\u00ed. Nen\u00ed to magie. Je to soubor priorit.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-14-suggested-routing-order\">Navrhovan\u00e9 po\u0159ad\u00ed tras<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Nejprve kritick\u00e9 sign\u00e1ly<\/li>\n\n\n\n<li>Hodinov\u00e9 linky, diferenci\u00e1ln\u00ed p\u00e1ry, citliv\u00e9 analogov\u00e9 uzly<\/li>\n\n\n\n<li>Sm\u011brov\u00e1n\u00ed nap\u00e1jen\u00ed<\/li>\n\n\n\n<li>Hlavn\u00ed kolejnice, silnoproud\u00e9 dr\u00e1hy<\/li>\n\n\n\n<li>V\u0161e ostatn\u00ed<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-15-ground-strategy\">Pozemn\u00ed strategie<\/h3>\n\n\n\n<p>Pokud m\u00e1te 2 vrstvy, je pevn\u00e1 zemn\u00edc\u00ed rovina na jedn\u00e9 stran\u011b zlat\u00e1. Sign\u00e1ly sm\u011brujte co nejv\u00edce na druhou stranu a pak uzemn\u011bte pomoc\u00ed pr\u016fchodek.<\/p>\n\n\n\n<p>Pokud mus\u00edte rozd\u011blit p\u016fdu, ud\u011blejte to s rozmyslem. Za\u010d\u00e1te\u010dn\u00edci v\u011bt\u0161inou rozd\u011bluj\u00ed p\u016fdu, i kdy\u017e by nem\u011bli. Souvisl\u00e1 zemn\u00ed rovina je obvykle lep\u0161\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-16-a-few-routing-habits-that-help\">N\u011bkolik n\u00e1vyk\u016f pro sm\u011brov\u00e1n\u00ed, kter\u00e9 pom\u00e1haj\u00ed<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vyhn\u011bte se dlouh\u00fdm tenk\u00fdm stop\u00e1m pro nap\u00e1jen\u00ed<\/li>\n\n\n\n<li>Pokud to v\u00e1\u0161 n\u00e1stroj snadno zvl\u00e1dne, pou\u017eijte 45stup\u0148ov\u00e9 rohy nebo oblouky. Ne proto, \u017ee by 90stup\u0148ov\u00e9 rohy byly p\u0159i n\u00edzk\u00fdch rychlostech \u0161patn\u00e9, ale proto, \u017ee jsou \u010dist\u0161\u00ed.<\/li>\n\n\n\n<li>Minimalizace pr\u016fchodek u citliv\u00fdch nebo rychl\u00fdch sign\u00e1l\u016f<\/li>\n\n\n\n<li>M\u011bjte na pam\u011bti zp\u00e1te\u010dn\u00ed cesty. Sign\u00e1ly pot\u0159ebuj\u00ed pod sebou zp\u011btnou proudovou cestu, obvykle v zemn\u00ed rovin\u011b.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-17-differential-pairs-usb-etc\">Diferenci\u00e1ln\u00ed p\u00e1ry (USB atd.)<\/h3>\n\n\n\n<p>Pokud m\u00e1te USB D+ a D-, sm\u011brujte je jako <a href=\"https:\/\/resources.pcb.cadence.com\/blog\/2024-controlled-impedance-design-guide-cadence\" rel=\"noreferrer noopener\" target=\"_blank\">diferenci\u00e1ln\u00ed p\u00e1r s konzistentn\u00ed rozte\u010d\u00ed a shodnou d\u00e9lkou.<\/a>, a pou\u017eijte spr\u00e1vnou impedanci, pokud ji va\u0161e sestava podporuje. V\u00e1\u0161 n\u00e1stroj CAD obvykle dok\u00e1\u017ee vypo\u010d\u00edtat \u0161\u00ed\u0159ku na z\u00e1klad\u011b stackupu.<\/p>\n\n\n\n<p>Pokud nev\u00edte, nevad\u00ed. Ale ned\u011blejte freestyle a ned\u011blejte z jedn\u00e9 stopy hada kolem desky, zat\u00edmco druh\u00e1 jde rovn\u011b.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-18-step-9-add-copper-pours-thermal-relief-and-stitching-vias\">Krok 9: P\u0159id\u00e1n\u00ed m\u011bd\u011bn\u00fdch z\u00e1livek, tepeln\u00e9ho odleh\u010den\u00ed a pro\u0161it\u00ed pr\u016fchodek<\/h2>\n\n\n\n<p>M\u011bd\u011bn\u00e9 n\u00e1pln\u011b mohou sn\u00ed\u017eit impedanci a pomoci s teplem. B\u011b\u017en\u00e9 z\u00e1livky:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uzemn\u011bn\u00ed naho\u0159e a dole (p\u0159ipojeno k s\u00edti GND)<\/li>\n\n\n\n<li>Nap\u00e1jec\u00ed li\u0161ty pro vysokoproud\u00e9 li\u0161ty, pokud pot\u0159ebujete<\/li>\n<\/ul>\n\n\n\n<p>Pro pr\u016fchoz\u00ed podlo\u017eky p\u0159ipojen\u00e9 k n\u00e1lev\u016fm pou\u017eijte tepeln\u00e9 odleh\u010den\u00ed. Jinak se ru\u010dn\u00ed p\u00e1jen\u00ed st\u00e1v\u00e1 ne\u0161\u0165astn\u00fdm a i p\u0159epracov\u00e1n\u00ed je obt\u00ed\u017en\u011bj\u0161\u00ed.<\/p>\n\n\n\n<p>P\u0159idejte pro\u0161\u00edvac\u00ed pr\u016fchodky pro spojen\u00ed horn\u00edho a spodn\u00edho zemn\u00edc\u00edho pole. Zejm\u00e9na po obvodu, v bl\u00edzkosti konektor\u016f a v bl\u00edzkosti sp\u00ednac\u00edch regul\u00e1tor\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-19-step-10-silkscreen-make-the-board-friendly\">Krok 10: S\u00edtotisk. Ud\u011blejte desku p\u0159\u00e1telskou<\/h2>\n\n\n\n<p>S\u00edtotisk nejsou jen etikety. Je to pou\u017eitelnost.<\/p>\n\n\n\n<p>Zahrnuje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Referen\u010dn\u00ed ozna\u010den\u00ed (R1, C5, U2) alespo\u0148 pro kl\u00ed\u010dov\u00e9 d\u00edly.<\/li>\n\n\n\n<li>Zna\u010dky polarity pro diody, elektrolytika, LED diody<\/li>\n\n\n\n<li>Zna\u010dky pin\u016f 1 pro integrovan\u00e9 obvody<\/li>\n\n\n\n<li>\u0160t\u00edtky konektor\u016f. TX, RX, 5V, GND atd.<\/li>\n\n\n\n<li>N\u00e1zev desky, verze, datum nebo revize<\/li>\n<\/ul>\n\n\n\n<p>Nechte si drobky. Po m\u011bs\u00edc\u00edch se na tuto n\u00e1st\u011bnku vr\u00e1t\u00edte a nebudete si nic pamatovat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-20-step-11-run-checks-before-you-export-anything\">Krok 11: Prove\u010fte kontrolu p\u0159ed exportem \u010dehokoli<\/h2>\n\n\n\n<p>Prove\u010fte je v n\u00e1stroji CAD:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ERC na sch\u00e9matu (kontrola elektrick\u00fdch pravidel)<\/li>\n\n\n\n<li>DRC na PCB (kontrola pravidel n\u00e1vrhu)<\/li>\n\n\n\n<li>Kontrola nep\u0159ipojen\u00fdch s\u00edt\u00ed<\/li>\n\n\n\n<li>Poru\u0161en\u00ed p\u0159i odbaven\u00ed<\/li>\n\n\n\n<li>Kontroly krou\u017ek\u016f a vrt\u00e1k\u016f<\/li>\n<\/ul>\n\n\n\n<p>Pot\u00e9 prove\u010fte lidskou kontrolu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Jsou v\u0161echny konektory nasm\u011brov\u00e1ny spr\u00e1vn\u00fdm sm\u011brem?<\/li>\n\n\n\n<li>Jsou mont\u00e1\u017en\u00ed otvory spr\u00e1vn\u00e9?<\/li>\n\n\n\n<li>Jsou na okraji desky n\u011bjak\u00e9 komponenty, kter\u00e9 budou kolidovat s krytem?<\/li>\n\n\n\n<li>Vym\u011bnili jste TX a RX. St\u00e1v\u00e1 se to<\/li>\n\n\n\n<li>Odpov\u00eddaj\u00ed v\u0161echny polarizovan\u00e9 d\u00edly sch\u00e9matu a s\u00edtotisku?<\/li>\n<\/ul>\n\n\n\n<p>Pokud m\u016f\u017eete, prove\u010fte 3D zobrazen\u00ed. Mnoho n\u00e1stroj\u016f ho dnes podporuje a rychle zachyt\u00ed hloup\u00e9 mechanick\u00e9 probl\u00e9my.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-21-step-12-generate-manufacturing-files-gerbers-drills-and-notes\">Krok 12: Generov\u00e1n\u00ed v\u00fdrobn\u00edch soubor\u016f (Gerbery, vrt\u00e1ky a pozn\u00e1mky)<\/h2>\n\n\n\n<p>V\u011bt\u0161ina v\u00fdrobc\u016f desek plo\u0161n\u00fdch spoj\u016f chce:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/learn.sparkfun.com\/tutorials\/beginners-guide-to-kicad\/exporting-gerbers\" target=\"_blank\" rel=\"noreferrer noopener\">Soubory Gerber<\/a> (nebo n\u011bkdy jeden bal\u00ed\u010dek Gerber zip)<\/li>\n\n\n\n<li>Soubory pro vrt\u00e1n\u00ed (Excellon)<\/li>\n\n\n\n<li>Osnova p\u0159edstavenstva<\/li>\n\n\n\n<li>Readme nebo pozn\u00e1mky k v\u00fdrob\u011b (nepovinn\u00e9, ale u\u017eite\u010dn\u00e9)<\/li>\n\n\n\n<li>Pro mont\u00e1\u017e: Soubor kusovn\u00edku a soubor pick and place (centroid) a mont\u00e1\u017en\u00ed v\u00fdkresy.<\/li>\n<\/ul>\n\n\n\n<p>Exportovat pomoc\u00ed doporu\u010den\u00fdch nastaven\u00ed fab, pokud poskytuj\u00ed p\u0159edvolbu.<\/p>\n\n\n\n<p>Je\u0161t\u011b jedna v\u011bc. Jasn\u011b pojmenujte sv\u00e9 vrstvy. A udr\u017eujte verze. \u201cfinal final v7\u201d je vtipn\u00e9, dokud nen\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-22-step-13-prototype-like-you-expect-problems-because-there-will-be-some\">Krok 13: Vytvo\u0159te prototyp tak, abyste o\u010dek\u00e1vali probl\u00e9my (proto\u017ee n\u011bjak\u00e9 nastanou).<\/h2>\n\n\n\n<p>Nejprve si objednejte malou d\u00e1vku. I kdy\u017e je design \u201cjednoduch\u00fd\u201d.<\/p>\n\n\n\n<p>Kdy doraz\u00ed desky:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kontrola p\u0159i dobr\u00e9m sv\u011btle<\/li>\n\n\n\n<li>P\u0159ed zapojen\u00edm zkontrolujte, zda na nap\u00e1jec\u00edch li\u0161t\u00e1ch nedo\u0161lo ke zkratu.<\/li>\n\n\n\n<li>Pomal\u00e9 zvy\u0161ov\u00e1n\u00ed v\u00fdkonu, pokud m\u016f\u017eete, pomoc\u00ed stoln\u00edho zdroje a proudov\u00e9ho omezen\u00ed.<\/li>\n\n\n\n<li>Validace kolejnic, pak hodin, pak programov\u00e1n\u00ed, pak periferi\u00ed<\/li>\n<\/ul>\n\n\n\n<p>Pokud n\u011bco sel\u017ee, nepanika\u0159te. Systematicky odstra\u0148ujte chyby. V\u011bt\u0161ina prvn\u00edch chyb na desk\u00e1ch plo\u0161n\u00fdch spoj\u016f je:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0160patn\u00fd otisk nebo \u0161patn\u00e9 mapov\u00e1n\u00ed pin\u016f<\/li>\n\n\n\n<li>Chyb\u011bj\u00edc\u00ed pullup nebo pull down<\/li>\n\n\n\n<li>Probl\u00e9my se sekvenc\u00ed nap\u00e1jen\u00ed nebo stabilitou regul\u00e1toru (\u0161patn\u00e9 krytky)<\/li>\n\n\n\n<li>Probl\u00e9my s uspo\u0159\u00e1d\u00e1n\u00edm sp\u00ednac\u00edch regul\u00e1tor\u016f<\/li>\n\n\n\n<li>Probl\u00e9my s uzemn\u011bn\u00edm nebo zp\u011btnou cestou<\/li>\n\n\n\n<li>Jednoduch\u00e9 chyby orientace<\/li>\n<\/ul>\n\n\n\n<p>Je to norm\u00e1ln\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-23-a-simple-tool-stack-that-works-if-you-are-picking-software\">Jednoduch\u00fd z\u00e1sobn\u00edk n\u00e1stroj\u016f, kter\u00fd funguje (pokud vyb\u00edr\u00e1te software)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.kicad.org\/discover\/gerber-viewer\/\" target=\"_blank\" rel=\"noreferrer noopener\">KiCad<\/a>: zdarma, velmi schopn\u00fd, skv\u011bl\u00e1 komunita<\/li>\n\n\n\n<li>EasyEDA: vhodn\u00e9, pokud chcete rychl\u00e9 cloudov\u00e9 pracovn\u00ed postupy<\/li>\n\n\n\n<li>Altium: pr\u016fmyslov\u00fd standard, drah\u00fd, v\u00fdkonn\u00fd<\/li>\n\n\n\n<li>Autodesk Fusion electronics: z\u00e1le\u017e\u00ed na va\u0161em pracovn\u00edm postupu<\/li>\n<\/ul>\n\n\n\n<p>Pokud jste nov\u00e1\u010dkem, KiCad je siln\u00fdm v\u00fdchoz\u00edm bodem a u\u017e d\u00e1vno to nen\u00ed hra\u010dka.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-24-common-beginner-mistakes-that-are-weirdly-easy-to-avoid\">B\u011b\u017en\u00e9 chyby za\u010d\u00e1te\u010dn\u00edk\u016f, kter\u00fdm se lze kupodivu snadno vyhnout<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-25-forgetting-decoupling-capacitors\">Zapomenut\u00ed na odd\u011blovac\u00ed kondenz\u00e1tory<\/h3>\n\n\n\n<p>V\u011bt\u0161ina integrovan\u00fdch obvod\u016f vy\u017eaduje 0,1uF v bl\u00edzkosti ka\u017ed\u00e9ho nap\u00e1jec\u00edho pinu a nav\u00edc hromadn\u00fd kondenz\u00e1tor v bl\u00edzkosti (nap\u0159. 4,7uF nebo 10uF). P\u0159e\u010dt\u011bte si datasheet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-26-trusting-random-footprints\">D\u016fv\u011b\u0159ovat n\u00e1hodn\u00fdm stop\u00e1m<\/h3>\n\n\n\n<p>Otisky z knihoven jsou u\u017eite\u010dn\u00e9, ale ov\u011b\u0159te si je podle datasheetu. V\u017edy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-27-putting-the-programming-header-somewhere-impossible\">Um\u00edst\u011bn\u00ed programov\u00e9 hlavi\u010dky na nemo\u017en\u00e9 m\u00edsto<\/h3>\n\n\n\n<p>Pokud pot\u0159ebujete flashovat firmware, neschov\u00e1vejte hlavi\u010dku pod displej ani ji neumis\u0165ujte 1 mm od st\u011bny sk\u0159\u00edn\u011b.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-28-no-test-points\">\u017d\u00e1dn\u00e9 testovac\u00ed body<\/h3>\n\n\n\n<p>Dokonce jen podlo\u017eky pro GND, 3V3, 5V, RX, TX. Umo\u017e\u0148uje to sondov\u00e1n\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-29-switching-regulator-layout-just-routed\">Rozlo\u017een\u00ed sp\u00ednac\u00edho regul\u00e1toru \u201cjen sm\u011brov\u00e1no\u201d<\/h3>\n\n\n\n<p>Sp\u00ednac\u00ed regul\u00e1tory maj\u00ed sm\u011brnice pro uspo\u0159\u00e1d\u00e1n\u00ed z n\u011bjak\u00e9ho d\u016fvodu. Co nejp\u0159esn\u011bji dodr\u017eujte referen\u010dn\u00ed uspo\u0159\u00e1d\u00e1n\u00ed v datasheetu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-30-final-thought-and-the-part-where-you-actually-get-boards-made\">Z\u00e1v\u011bre\u010dn\u00e1 my\u0161lenka (a \u010d\u00e1st, kde si skute\u010dn\u011b nech\u00e1te vyrobit desky)<\/h2>\n\n\n\n<p>N\u00e1vrh desky plo\u0161n\u00fdch spoj\u016f je smy\u010dka. Navrhujete, konstruujete, u\u010d\u00edte se, opravujete. Druh\u00e1 deska je v\u017edy \u010dist\u0161\u00ed ne\u017e prvn\u00ed.<\/p>\n\n\n\n<p>Pokud chcete v\u00fdrobn\u00edho partnera, kter\u00fd dok\u00e1\u017ee p\u0159evz\u00edt v\u00e1\u0161 Gerbers a pom\u016f\u017ee v\u00e1m ho dostat p\u0159es c\u00edlovou \u010d\u00e1ru bez dohad\u016f, je to d\u016fle\u017eit\u00e9. Hodn\u011b.<\/p>\n\n\n\n<p>Hled\u00e1te spolehliv\u00e9ho partnera pro v\u00fdrobu desek plo\u0161n\u00fdch spoj\u016f?<\/p>\n\n\n\n<p>Ode\u0161lete sv\u00e9 soubory s n\u00e1vrhy na adresu <a href=\"https:\/\/flj-pcb.com\/cs\/contact\/\">Philifast\u00a0<\/a>a z\u00edskejte konkurenceschopnou nab\u00eddku s profesion\u00e1ln\u00ed podporou.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-31-faqs-frequently-asked-questions\">\u010casto kladen\u00e9 ot\u00e1zky (FAQ)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-32-what-are-the-key-steps-involved-in-designing-a-pcb-from-schematic-to-finished-board\">Jak\u00e9 jsou kl\u00ed\u010dov\u00e9 kroky p\u0159i n\u00e1vrhu desky plo\u0161n\u00fdch spoj\u016f od sch\u00e9matu po hotovou desku?<\/h3>\n\n\n\n<p>N\u00e1vrh desky plo\u0161n\u00fdch spoj\u016f zahrnuje \u0159et\u011bzec krok\u016f: definov\u00e1n\u00ed po\u017eadavk\u016f a omezen\u00ed, vytvo\u0159en\u00ed sch\u00e9matu, p\u0159i\u0159azen\u00ed patic, nastaven\u00ed obrys\u016f desky a mechanick\u00fdch omezen\u00ed, promy\u0161len\u00e9 rozm\u00edst\u011bn\u00ed komponent, sm\u011brov\u00e1n\u00ed stop a rovin, spu\u0161t\u011bn\u00ed kontroly pravidel n\u00e1vrhu a elektrick\u00fdch parametr\u016f, generov\u00e1n\u00ed v\u00fdrobn\u00edch soubor\u016f, v\u00fdroba a mont\u00e1\u017e desky a nakonec testov\u00e1n\u00ed a p\u0159\u00edpadn\u00e9 iterace.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-33-why-is-it-important-to-start-pcb-design-with-clear-requirements\">Pro\u010d je d\u016fle\u017eit\u00e9 za\u010d\u00edt n\u00e1vrh DPS s jasn\u00fdmi po\u017eadavky?<\/h3>\n\n\n\n<p>Za\u010d\u00edn\u00e1te-li s jasn\u00fdmi po\u017eadavky, pom\u00e1h\u00e1 to utv\u00e1\u0159et v\u0161echny aspekty n\u00e1vrhu desek plo\u0161n\u00fdch spoj\u016f. Pokud v\u00edte, k \u010demu m\u00e1 deska slou\u017eit, jak\u00fd je rozsah vstupn\u00edho nap\u011bt\u00ed, proudov\u00e9 limity, omezen\u00ed velikosti, zp\u016fsoby mont\u00e1\u017ee, pot\u0159eby konektor\u016f, citliv\u00e9 sign\u00e1ly, podm\u00ednky prost\u0159ed\u00ed, c\u00edlov\u00e9 n\u00e1klady a mno\u017estv\u00ed, m\u016f\u017eete u\u010dinit informovan\u00e1 rozhodnut\u00ed, jako je po\u010det vrstev (2 vs. 4 vrstvy), \u0161\u00ed\u0159ka stop, \u0159\u00edzen\u00ed impedance a v\u00fdb\u011br komponent, kter\u00e9 odpov\u00eddaj\u00ed pot\u0159eb\u00e1m va\u0161eho projektu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-34-how-can-i-make-my-schematic-more-readable-and-easier-to-debug\">Jak mohu sv\u00e9 sch\u00e9ma ud\u011blat \u010diteln\u011bj\u0161\u00ed a snadn\u011bji laditeln\u00e9?<\/h3>\n\n\n\n<p>Zlep\u0161en\u00ed \u010ditelnosti sch\u00e9matu: m\u00edsto dlouh\u00fdch vodi\u010d\u016f v\u0161ude pou\u017e\u00edvejte s\u00ed\u0165ov\u00e9 \u0161t\u00edtky; seskupujte sou\u010d\u00e1sti podle funkce, jako jsou nap\u00e1jec\u00ed \u010d\u00e1sti nebo senzory; um\u00edst\u011bte odd\u011blovac\u00ed kondenz\u00e1tory vedle nap\u00e1jec\u00edch pin\u016f integrovan\u00e9ho obvodu ve sch\u00e9matu; p\u0159idejte testovac\u00ed body na za\u010d\u00e1tku; uv\u00e1d\u011bjte hodnoty a \u010d\u00edsla sou\u010d\u00e1st\u00ed ve vyhrazen\u00fdch pol\u00edch nam\u00edsto pozn\u00e1mek; v\u017edy zkontrolujte v\u00fdvody s datov\u00fdmi listy, zejm\u00e9na u slo\u017eit\u00fdch sou\u010d\u00e1st\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-35-what-should-i-consider-when-choosing-components-for-my-pcb\">Na co bych m\u011bl br\u00e1t ohled p\u0159i v\u00fdb\u011bru sou\u010d\u00e1stek pro svou desku plo\u0161n\u00fdch spoj\u016f?<\/h3>\n\n\n\n<p>Vyberte si komponenty, kter\u00e9 existuj\u00ed v re\u00e1ln\u00e9m \u017eivot\u011b, s dostupn\u00fdmi rozm\u011bry a podporou dodavatelsk\u00e9ho \u0159et\u011bzce. V\u011bnujte pozornost velikostem balen\u00ed, kter\u00e9 m\u016f\u017eete p\u00e1jet (0603 je zvl\u00e1dnuteln\u00e9; men\u0161\u00ed velikosti jako 0402 nebo QFN vy\u017eaduj\u00ed opatrnost), jmenovit\u00fdm hodnot\u00e1m nap\u011bt\u00ed\/proudu s rezervou, mechanick\u00fdm v\u00fdkres\u016fm, zejm\u00e9na u konektor\u016f, a vyb\u00edrejte sou\u010d\u00e1stky z dob\u0159e podporovan\u00fdch \u0159ad, pokud pl\u00e1nujete budouc\u00ed doobjedn\u00e1vky. Vyhn\u011bte se \u2018jednoro\u017ec\u016fm\u2019, kter\u00e9 se obt\u00ed\u017en\u011b sh\u00e1n\u011bj\u00ed nebo nahrazuj\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-36-how-do-i-ensure-my-footprints-match-the-actual-physical-parts-correctly\">Jak mohu zajistit, aby m\u00e9 otisky spr\u00e1vn\u011b odpov\u00eddaly skute\u010dn\u00fdm fyzick\u00fdm d\u00edl\u016fm?<\/h3>\n\n\n\n<p>Pe\u010dliv\u011b porovnejte po\u010det v\u00fdvod\u016f a jejich rozte\u010d; ov\u011b\u0159te varianty pouzdra (nap\u0159. SOIC vs. TSSOP); zkontrolujte zna\u010dky polarity na diod\u00e1ch nebo elektrolytech; potvr\u010fte rozm\u011bry dvorku a otvory pro p\u00e1jec\u00ed masku, zejm\u00e9na u vlastn\u00edch v\u00fd\u0159ez\u016f. Praktick\u00fdm tipem je vytisknout si rozvr\u017een\u00ed desky plo\u0161n\u00fdch spoj\u016f v pom\u011bru 1:1 na pap\u00edr a p\u0159ed dal\u0161\u00edm postupem na n\u011bj fyzicky um\u00edstit skute\u010dn\u00e9 sou\u010d\u00e1stky, abyste si ov\u011b\u0159ili, zda se hod\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-37-when-should-i-choose-a-4-layer-pcb-over-a-2-layer-one\">Kdy bych m\u011bl zvolit \u010dty\u0159vrstvou desku plo\u0161n\u00fdch spoj\u016f m\u00edsto dvouvrstv\u00e9?<\/h3>\n\n\n\n<p>\u010cty\u0159vrstv\u00e1 deska plo\u0161n\u00fdch spoj\u016f se doporu\u010duje, pokud m\u00e1te vysokorychlostn\u00ed sign\u00e1ly (nap\u0159. USB 2.0 nebo DDR), pot\u0159ebujete lep\u0161\u00ed zemn\u00ed referenci pro sn\u00ed\u017een\u00ed \u0161umu, mus\u00edte v\u00e9st hust\u00e9 sou\u010d\u00e1stky, jako jsou BGA nebo integrovan\u00e9 obvody s jemnou rozte\u010d\u00ed, nebo chcete zlep\u0161it integritu nap\u00e1jen\u00ed. B\u011b\u017en\u00fd \u010dty\u0159vrstv\u00fd stack zahrnuje horn\u00ed sign\u00e1ln\u00ed vrstvu, zemn\u00edc\u00ed rovinu, nap\u00e1jec\u00ed rovinu a spodn\u00ed sign\u00e1ln\u00ed vrstvu, co\u017e usnad\u0148uje tyto pot\u0159eby ve srovn\u00e1n\u00ed s typick\u00fdmi dvouvrstv\u00fdmi deskami vhodn\u00fdmi pro mnoho amat\u00e9rsk\u00fdch projekt\u016f.<\/p>","protected":false},"excerpt":{"rendered":"<p>If you have ever looked at a circuit board and thought, yeah I could never do that. You can. Not [&hellip;]<\/p>","protected":false},"author":1,"featured_media":4883,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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