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    <div class="moz-cite-prefix">Nevim, jestli se bavime o subj., ale ty
      ledky jsou vse v jednom a maji max napajeci napeti 5V...</div>
    <div class="moz-cite-prefix"><a
href="https://www.mouser.com/pdfDocs/WS2812B-2020_V10_EN_181106150240761.pdf">Feature
        (mouser.com)</a></div>
    <div class="moz-cite-prefix">Takze IMHO neco musi udelat z 12V tech
      5V a zbytek se protopi na stabilizatoru...<br>
    </div>
    <div class="moz-cite-prefix">Dne 19.01.2024 v 14:49 Petr Labaj
      napsal(a):<br>
    </div>
    <blockquote type="cite"
      cite="mid:8e4eb48e-ee0b-2b82-4675-a94136bc13f9@volny.cz">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      MyslĂ­m, Ĺľe to bude jinak.<br>
      Tipnul bych si, Ĺľe jednotlivĂ© LED budou vĂ­cechipovĂ©, takĹľe budou
      mĂ­t velkĂ© Uf.<br>
      A ten Ĺ™Ă­dicĂ­ chip bude mĂ­t sraĹľenĂ© napájenĂ­ ze 12V na 5V jen
      nÄ›jakĂ˝mi odpory.<br>
      Proto jsem uĹľ dřív psal, aby se tazatel podĂ­val na jeho zapojenĂ­.
      A u prvnĂ­ho chipu v Ĺ™etÄ›zci to napájenĂ­ snĂ­Ĺľil.<br>
      <br>
      PomÄ›r 100R a 10k je asi příliš vysokĂ˝. Je to 1:100, takĹľe to na
      napÄ›tĂ­ H pĹ™ihodĂ­ nÄ›jakĂ©ho 0.02V, a to je moĹľná málo.<br>
      Tak ten pull-up musĂ­ bĂ˝t menší, nebo moĹľná spíš sĂ©riovĂ˝ odpor
      vÄ›tší (pokud má fungovat i jako ochrana).<br>
      <br>
      PL<br>
      <br>
      ******************<br>
      <br>
      <div class="moz-cite-prefix">Dne 19.1.2024 v 14:36 Jaroslav Buchta
        napsal(a):<br>
      </div>
      <blockquote type="cite"
        cite="mid:e2bd4adb-d215-4b2b-9eec-e1b285993d5e@hascomp.cz">
        <meta http-equiv="Content-Type"
          content="text/html; charset=UTF-8">
        <div class="moz-cite-prefix">Zajimave, skoro bych si tipnul, ze
          to nebude PWM ale nejaky linearni stabilizator pro ty 3 LED,
          takze ten pasek bude celkem pouzitelny i jako topeni :-)<br>
        </div>
        <div class="moz-cite-prefix">Dne 19.01.2024 v 14:32 Jan PĹŻhonĂ˝
          napsal(a):<br>
        </div>
        <blockquote type="cite"
cite="mid:CAEwSxSHrdBbQx8upZGFC-C9cMfwys5i7_NGYLq5-uNGght-t8Q@mail.gmail.com">
          <meta http-equiv="content-type"
            content="text/html; charset=UTF-8">
          <div dir="ltr">Já nic Ĺˇmahem neodmĂ­tl. Rezistror 100R na pin
            ESP32 a na stranÄ› LED pásku 10k pull up nefunguje.
            <div><br>
            </div>
            <div>Upozorňuji, Ĺľe mám variantu 12V pásku, nebo spíše
              vodiÄŤe s jednotlivĂ˝mi segmenty LED. Na jednom segmentu
              jsou 3LED. Je tam i nÄ›jakĂ˝ malĂ˝ brouk, tak moĹľná kromÄ›
              adresace Ĺ™eší i zdroj / PWM na 12V aby to ty ledly
              pĹ™eĹľily.</div>
            <div><br clear="all">
              <div>
                <div dir="ltr" class="gmail_signature"
                  data-smartmail="gmail_signature">
                  <div dir="ltr">
                    <div>
                      <div dir="ltr">
                        <div>HP</div>
                      </div>
                    </div>
                  </div>
                </div>
              </div>
              <br>
            </div>
          </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">pá 19. 1. 2024 v 14:15
              odesĂ­latel Petr Labaj <<a href="mailto:labaj@volny.cz"
                moz-do-not-send="true" class="moz-txt-link-freetext">labaj@volny.cz</a>>
              napsal:<br>
            </div>
            <blockquote class="gmail_quote"
style="margin:0px 0px 0px
            0.8ex;border-left:1px solid
            rgb(204,204,204);padding-left:1ex">
              <div> Pokud by kolega Ĺˇmahem neodmĂ­tl co jsem mu napsal,
                tj. sĂ©riovĂ˝ odpor 100-470R a k nÄ›mu u LEDek velkĂ˝
                pull-up, tak by to jednak fungovalo,<br>
                a druhak ten sĂ©riovĂ˝ odpor spolu s nĂ­zkoimpedanÄŤnĂ­m
                vĂ˝stupem ten pin docela slušnÄ› ochránĂ­.<br>
                Protiargument "s velkĂ˝m pull-upem mi to nefungovalo"
                nebere v potaz ten sĂ©riovĂ˝ odpor, na kterĂ©m vznikne
                poĹľadovanĂ˝ Ăşbytek.<br>
                <br>
                S transilem bych byl trochu opatrnĂ˝ na kapacity. Na tĂ©
                sbÄ›rnici je celkem fofr, tak aby to ten transil nezabil.
                MnohĂ© majĂ­ kapacitu docela velkou.<br>
                <br>
                KdyĹľ uĹľ je tu o tom Ĺ™eÄŤ: používal jste nÄ›kdo prakticky
                12V pásky? A jak to fungovalo?<br>
                Tyhle inteligentnĂ­ pásky je tradiÄŤnÄ› používajĂ­ s 5V
                napájenĂ­m, kde pak kaĹľdá LED má svĹŻj proudovĂ˝ driver a
                Ăşbytek na nÄ›m je ještÄ› snesitelnĂ˝.<br>
                Vzhledem k principu fungovánĂ­ tÄ›chto LED to musĂ­ bĂ˝t pĹ™i
                vyšším napájecĂ­m napÄ›tĂ­ nÄ›jak ohnutĂ©. Nebo se tam
                používajĂ­ vĂ­cechipovĂ© LED s velkĂ˝m Uf?<br>
                I ten Ĺ™Ă­dicĂ­ chip má napájenĂ­ 5V, takĹľe je tĹ™eba to
                nÄ›jak ošéfovat.<br>
                Docela by mÄ› zajĂ­malo jak moc dobĹ™e to funguje (případnÄ›
                s jakĂ˝mi kompromisy).<br>
                <br>
                Skoro bych si myslel, Ĺľe 5V napájenĂ­ tomu sluší vĂ­c. I
                za cenu oboustrannĂ©ho napájenĂ­, případnÄ› ještÄ› i
                posĂ­lenĂ­ napájenĂ­ nÄ›kde uprostĹ™ed.<br>
                NejvÄ›tší instalaci jsem zkoušel s 3000 LED (50m pásku po
                60 LED/m) a i jenom oboustrannĂ© napájenĂ­ 5.2V tomu
                staÄŤilo.<br>
                Ale byl to jenom pokus na stole. V praxi je to pak
                nasazeno ve vĂ­ce segmentech, kde ke kaĹľdĂ©mu segmentu je
                dotaĹľeno napájenĂ­. Jen data jsou prĹŻběžná.<br>
                <br>
                A ještÄ› poznámka: mÄ›l jsem pásky rĹŻznĂ˝ch vĂ˝robcĹŻ, a byly
                rĹŻznÄ› citlivĂ© na polohu stĹ™edu intervalu, kde se
                rozhoduje 0/1.<br>
                <br>
                PL<br>
                <br>
                *****************<br>
                <br>
                <div>Dne 19.1.2024 v 6:15 Jaroslav Buchta napsal(a):<br>
                </div>
                <blockquote type="cite">
                  <div>Jako, ze spojite data pro vic pasku paralelne na
                    jeden pin? To budou vsechny vybarvene stejne.
                    Princip je, ze se tam sypou seriova data jako do
                    posuvneho registru skrz ten retezec a az se to
                    naplni, tak se delsim pulzem rozsviti. Zase muzete
                    udelat libovolne dlouhy retezec omezeny jen dobou
                    prepisu.</div>
                  <div>Pin bych taky urcite nejak ochranil a oddelil, 5m
                    uz je az dost na prime pripojeni, ten mosfet je IMHO
                    nic moc oddeleni, v log 0 je pripojen pin zase
                    primo. Nejaky transil by to asi zlepsil.</div>
                  <div><br>
                  </div>
                  <div>Dne 18.01.2024 v 22:06 Jan PĹŻhonĂ˝ napsal(a):<br>
                  </div>
                  <blockquote type="cite">
                    <div dir="auto">Ja to budu mit k prvni ledce asi 5
                      az 10m takze jo, bojim se o ten pin.</div>
                    <div dir="auto"><br>
                    </div>
                    <div dir="auto">S tim malym pulupem mi ten level
                      shifter funguje. Takze toto je vyreseno. Otazka
                      zni, jestli ten pulup dat hned k tranzistoru nebo
                      az na ten privod pasku za ten oddelovaci odpor.</div>
                    <div dir="auto"><br>
                    </div>
                    <div dir="auto">Ted me napada, jak se to chova /
                      adresuje, kdyz se tam da T kus nebo vice T kusu.
                      Jde to i potom adresovat na jednotlive LED? T kusy
                      jedte nedorazily a jsem linej to pajet abych to
                      vyzkousel.</div>
                    <div dir="auto"><br>
                    </div>
                    <div dir="auto">Nebo je lepsi si ty jednotlive vetve
                      dat na jine nohy procesoru a jet to samostatne?</div>
                    <div dir="auto"><br clear="all">
                      <div dir="auto">
                        <div dir="ltr" class="gmail_signature">
                          <div dir="ltr">
                            <div>
                              <div dir="ltr">
                                <div dir="auto">HP</div>
                              </div>
                            </div>
                          </div>
                        </div>
                      </div>
                    </div>
                    <div><br>
                    </div>
                    <div><br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">ÄŤt 18. 1. 2024
                          v 20:28 odesĂ­latel Petr Zapadlo <<a
                            href="mailto:zapik@email.cz" target="_blank"
                            moz-do-not-send="true"
                            class="moz-txt-link-freetext">zapik@email.cz</a>>
                          napsal:<br>
                        </div>
                        <blockquote class="gmail_quote"
style="margin:0px
                        0px 0px 0.8ex;border-left:1px solid
                        rgb(204,204,204);padding-left:1ex">
                          <div>
                            <p>Jinak jen podotknu, Ĺľe datovĂ˝ pin nejde
                              po celĂ©m kabelu ale jen po prvnĂ­ LED/IC. 
                              takĹľe de fakto jen přívodnĂ­ kabel.  Dál uĹľ
                              si to opakujĂ­ jednotlivĂ© IC samy.</p>
                            <p><br>
                            </p>
                            <p>Petr<br>
                            </p>
                            <div>Dne 18. 01. 24 v 19:45 Jaroslav Buchta
                              napsal(a):<br>
                            </div>
                          </div>
                          <div>
                            <blockquote type="cite">
                              <div>A tak proc ne, to je docela dobry
                                prevodnik jako OC pullup, 470R uz dava
                                pro rozumnou delku propojeni smysl. 10k
                                tak v ramci DPS (na odkaz jsem predtim
                                nekoukal)</div>
                              <div>Ja tu ledku rad pouzivam jako
                                stavovou primo u MCU, dobry tip, asi
                                bude jeden BSS138 levnejsi nez dioda a
                                kondik ;-)</div>
                              <div><br>
                              </div>
                              <div>Dne 18.01.2024 v 19:22 Jan PĹŻhonĂ˝
                                napsal(a):<br>
                              </div>
                              <blockquote type="cite">
                                <div dir="ltr">JenĹľe já to mám celĂ©
                                  zalitĂ©. LED moduly na kabelu. Nechci
                                  to kuchat.
                                  <div><br>
                                  </div>
                                  <div>SnĂ­Ĺľil jsem R2 aĹľ na 470R a chodĂ­
                                    to jak z praku.</div>
                                  <div><br>
                                  </div>
                                  <div>HP</div>
                                </div>
                                <br>
                                <div class="gmail_quote">
                                  <div dir="ltr" class="gmail_attr">ÄŤt
                                    18. 1. 2024 v 19:18 odesĂ­latel
                                    Jaroslav Buchta <<a
href="mailto:jaroslav.buchta@hascomp.cz" target="_blank"
                                      moz-do-not-send="true"
                                      class="moz-txt-link-freetext">jaroslav.buchta@hascomp.cz</a>>
                                    napsal:<br>
                                  </div>
                                  <blockquote class="gmail_quote"
style="margin:0px 0px 0px
                                  0.8ex;border-left:1px solid
                                  rgb(204,204,204);padding-left:1ex">Je
                                    blbe, ze vstupni uroven o chlup pro
                                    5V nevychazi, kdyz je jedna ledka <br>
                                    na desce, tak snizim napajeci napeti
                                    z 5V diodou.<br>
                                    Pro retezec by to nejaky prevodnik
                                    urovni chtelo, ruzna hradla HCT, <br>
                                    ACT... se delaji i SOT23-5,6
                                    jednotlive, to bych asi volil.<br>
                                    <br>
                                    Dne 18.01.2024 v 19:14 Jan PĹŻhonĂ˝
                                    napsal(a):<br>
                                    > DobrĂ˝ veÄŤer,<br>
                                    ><br>
                                    > hraju si tady s adresovatelnĂ˝mi
                                    ledkami WS2812B. Mám 12V variantu <br>
                                    > ledek na kabelu. PĹ™ipojenĂ© to
                                    mám k ESP32. KdyĹľ ten datovĂ˝ vodiÄŤ <br>
                                    > pĹ™ipojĂ­m napřímo na pin funguje
                                    to, kdyĹľ tam dám doporuÄŤovanĂ˝ 470R <br>
                                    > rezistor, tak to nefunguje.
                                    Ĺ˜ekl jsem si, Ĺľe to je 3V3 logikou a
                                    chtÄ›l <br>
                                    > tam dát nÄ›co takovĂ©ho: <br>
                                    > <a
href="https://www.eevblog.com/forum/index.php?action=dlattach;topic=344623.0;attach=1596409;image"
                                      rel="noreferrer" target="_blank"
                                      moz-do-not-send="true"
                                      class="moz-txt-link-freetext">https://www.eevblog.com/forum/index.php?action=dlattach;topic=344623.0;attach=1596409;image</a>
                                    <br>
                                    > . Mám pocit, Ĺľe jsem toto
                                    zapojenĂ­ uĹľ nÄ›kde pouĹľil a fungovalo
                                    mi to. <br>
                                    > Co dÄ›lám blbÄ›?<br>
                                    ><br>
                                    > PĹ™ece jen pĹ™ipojit to na pin
                                    MCU přímo mi pĹ™ijde jako prasárna, <br>
                                    > nehledÄ› na to, Ĺľe ten kabel s
                                    tÄ›mi LEDkami bude dost dlouhĂ˝ asi by
                                    to <br>
                                    > na konci dost zlobilo, ĂşrovnÄ›
                                    jsou dost na hranÄ›. RadÄ›ji bych tam
                                    mÄ›l <br>
                                    > pĹ™evodnĂ­k ĂşrovnÄ› Nebo to fakt
                                    musĂ­m na takovouhle jednoduchou vÄ›c
                                    <br>
                                    > dávat 74HC7014? Hledal jsem
                                    nÄ›co přímo pro ty WS2812B ale nic
                                    moc jsem <br>
                                    > nenašel.<br>
                                    ><br>
                                    > SamozĹ™ejmÄ› ve všech arduino
                                    návodech to je naprasené přímo na
                                    pin <br>
                                    > ESP32 a funguje to a nikdo to
                                    neĹ™eší, ale to nechci.<br>
                                    ><br>
                                    > DĂ­ky,<br>
                                    ><br>
                                    > HP<br>
                                  </blockquote>
                                </div>
                              </blockquote>
                            </blockquote>
                          </div>
                        </blockquote>
                      </div>
                    </div>
                  </blockquote>
                </blockquote>
                <br>
              </div>
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        <p><br>
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        <pre class="moz-quote-pre" wrap="">_______________________________________________
HW-list mailing list  -  sponsored by <a
        class="moz-txt-link-abbreviated" href="http://www.HW.cz"
        moz-do-not-send="true">www.HW.cz</a>
<a class="moz-txt-link-abbreviated moz-txt-link-freetext"
        href="mailto:Hw-list@list.hw.cz" moz-do-not-send="true">Hw-list@list.hw.cz</a>
<a class="moz-txt-link-freetext"
        href="http://list.hw.cz/mailman/listinfo/hw-list"
        moz-do-not-send="true">http://list.hw.cz/mailman/listinfo/hw-list</a>
</pre>
      </blockquote>
      <br>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
HW-list mailing list  -  sponsored by <a class="moz-txt-link-abbreviated" href="http://www.HW.cz">www.HW.cz</a>
<a class="moz-txt-link-abbreviated" href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</a>
<a class="moz-txt-link-freetext" href="http://list.hw.cz/mailman/listinfo/hw-list">http://list.hw.cz/mailman/listinfo/hw-list</a>
</pre>
    </blockquote>
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