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    <div class="moz-cite-prefix">Dobrý den,<br>
      těch 60mA by mělo být max. Bude tam PWM, vzdálenost chipu s PWM k
      led by měla být tedy minimální.<br>
      Uvažuji také o použití hotových modulů např. zde:<br>
<a class="moz-txt-link-freetext" href="http://www.ebay.com/itm/50pcs-12mm-Non-waterproof-WS2811-Pixel-node-Module-Light-No-Wire-Addressable-5V-/181376615558?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a3ae38486">http://www.ebay.com/itm/50pcs-12mm-Non-waterproof-WS2811-Pixel-node-Module-Light-No-Wire-Addressable-5V-/181376615558?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a3ae38486</a><br>
      <br>
      Nicméně ty jsou na 5V, musel bych udělat větev s 5V např 5m s600mA
      pro 10x LED. Nechat to paralelně a z nějakého jiného CPU to řídit
      nebo přes optočlen poslat do další větve LED.<br>
      Zapojit ty moduly do série nelze, nepůjde řízení. To by se musely
      oddělit optočleny a tím zase nějaké kus DPS... , poté to je již
      lepší udělat celé.<br>
      <br>
      Ty moduly mají:<br>
      0V,5V, Data vstup a Data výstup. Právě ty data se zapojují do
      série, jenže musí být na stejném potenciálu, pokud ne, tak bych
      tedy dal optočlen.<br>
      <br>
      <br>
      Ono všude dávat tlusté kabely něco stojí finančně. Velké proudy k
      tomu a rušení je tu. Uvažoval jsem i větve dát přes nějaký měnič
      např. LM29xx z těch 35VDC, ale to se mi nechce, v kombinaci s PWM
      ledek a deset měničů na stromě s dlouhou kabeláží, to by vůbec
      nemuselo jet. Samozřejmě všude kondíky, oddělit LC členy... ,ale
      stejně. <br>
      Raději rozdělit těch 35VDC čistě analogově, napájecí zdroj taky
      čisté trafo. Čím méně pulsů, tím méně problémů.<br>
      <br>
      Jirka<br>
      <br>
      <br>
      <br>
    </div>
    <blockquote
cite="mid:CALQx4rLm_veUSX1Nmq7N6eOZ9tMkcrfw--_y12PpGVCRVdf+-g@mail.gmail.com"
      type="cite">
      <div dir="ltr">
        <div>
          <div>
            <div>Dobry vecer,<br>
              <br>
            </div>
            dakujem za vysvetlenie.<br>
            <br>
          </div>
        </div>
        <div>A este jedna otazka, tych 60mA je impulzny prud, alebo
          kontinualny? Mne sa zda, ze kontinualny.<br>
        </div>
        <div><br>
        </div>
        A. <br>
        <br>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">2014-10-27 19:19 GMT+01:00 Jiří
          Nesvačil <span dir="ltr"><<a moz-do-not-send="true"
              href="mailto:nesvacil@posys.eu" target="_blank">nesvacil@posys.eu</a>></span>:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div text="#000000" bgcolor="#FFFFFF">
              <div>Zdravim,<br>
                ano kazdou ledku chci ridit zvlast, presne RGB, 24 bitu.<br>
                75m je na strome cca obvod kabelu. A ledek tam chci dat
                ve vzdalenosti od 20-70cm tj. 375-100. Dle moznosti. Na
                RGB led se pocita tak 60mA. 375ledek x 0.06ma x
                5V=112,5W. To pri 5V dela proud 22.5A. Zkousel jsem pri
                techto proudech pocitat ztraty a vedeni a je to ... .
                Pokud bych se vykaslal a pocital to 375*0.06*12V=270W
                nicmene ten proud tech 22.5A tam je.<br>
                <br>
                Nicmene pokud vezmu 112.5W/35VDC=3,12A a to jiz je
                snesitelne, i kdyz tam budou ztraty a treba 4-5A to bude
                chtit.<br>
                <br>
                Jirka<br>
                <br>
                <br>
                Dne 27. 10. 2014 17:59, Andrej Jancura napsal(a):<br>
              </div>
              <div>
                <div class="h5">
                  <blockquote type="cite">
                    <div dir="ltr">
                      <div>
                        <div>Dobry vecer,<br>
                          <br>
                        </div>
                        viete, chcel by som sa spytat na tu
                        najzakladnejsiu vec, ktoru som z Vasho
                        doterajsieho kecania do teraz nepochopil. A to,
                        ze kolko lediek mate v jednej vetve, a ako
                        chcete regulovat jas, chcete regulovat kazdu
                        diodu v serii zvlast alebo staci len celu vetvu?
                        Podla toho sa budete musiet rozhodnut. Pokial
                        chcete hotove risenie, tak pred par rokmi, ked
                        sme boli na vianocne pivo, tak to bolo hotove a
                        navesane na kazdom strome v meste... A myslim
                        si, ze tomu staci klasicky rozvod 230V.<br>
                        <br>
                      </div>
                      To riesenie, ktore tu ponukal p.Hanzal, s tymi
                      ledkami s integrovanym ovladacim cipom, si myslim,
                      ze na Vas strom nebude moc vhodne. Tie pasy lediek
                      maju urcitu dlzku a hlavne nie je medzi dvoma
                      takymito ledkami s riadenim meter kabla... A uz
                      vonkoncom nie 75m...<br>
                      <div><br>
                      </div>
                      <div>Kedze si to cele nedokazem predstavit, tak
                        som si dovolil aspon par poznamok.<br>
                        <br>
                      </div>
                      <div>A.<br>
                      </div>
                      <div><br>
                      </div>
                    </div>
                    <div class="gmail_extra"><br>
                      <div class="gmail_quote">2014-10-27 16:02
                        GMT+01:00 Jiří Nesvačil <span dir="ltr"><<a
                            moz-do-not-send="true"
                            href="mailto:nesvacil@posys.eu"
                            target="_blank">nesvacil@posys.eu</a>></span>:<br>
                        <blockquote class="gmail_quote" style="margin:0
                          0 0 .8ex;border-left:1px #ccc
                          solid;padding-left:1ex">
                          <div text="#000000" bgcolor="#FFFFFF">
                            <div>Jednoduche reseni rozdeleni napeti na
                              nekolikrat 5V z cca 35VDC, co me napada je
                              cca takto:<br>
                              <img
                                src="cid:part3.06030809.00050809@posys.cz"
                                alt=""><br>
                              K zenerkam dam jeste nejaky odpor v serii.
                              Doplnim kondiky. Jen musim tahnout 4 draty
                              tj. 0V,24V,Ridici,1xposunovane napeti tech
                              cca 5V.<br>
                              <br>
                              Samozrejme jakmile se 1x ledka sepne, tak
                              v cele vetvi jde proud.<br>
                              <br>
                              Jirka<br>
                              <br>
                              <br>
                              <br>
                              Dne 27. 10. 2014 15:28, Andrej Jancura
                              napsal(a):<br>
                            </div>
                            <div>
                              <div>
                                <blockquote type="cite">
                                  <div dir="ltr">
                                    <div>
                                      <div>
                                        <div>Dobry den,<br>
                                          <br>
                                        </div>
                                        len par poznamok. Microchip
                                        vyraba kontrolery, ktore idu
                                        napajat tusim 15V. Maju v sebe
                                        integrovany ldo a su tusim
                                        oznacene skratkou HV v type. Tym
                                        by sa Vam dost usetrilo pri
                                        tahani toho kabla, aj ked si
                                        myslim, ze budete potrebovat
                                        viac zil, takze tych vasich 75m
                                        je minimum.<br>
                                        <br>
                                      </div>
                                      Ked chcete vyuzit nejaky spinany
                                      zdroj pri kazdej ledke, nemusite
                                      hned pouzit nejaku topologiu s
                                      RLC, ci vyuzivat parazitne
                                      vlastnosti kabla, staci sa
                                      inspirovat tusim charlieplexom, ci
                                      ako sa to vola. V podstate ide o
                                      to, ze tu ledku budite impulzne
                                      kratuckym impulzom. Pozrite sa do
                                      nejakych tych atmelackych avr app.
                                      Tam najdete dost inspiracie.
                                      (Skuste sa pripadne opytat weka,
                                      on nieco take ukazoval na
                                      poslednej vianocnej listovici...)<br>
                                      <br>
                                    </div>
                                    Nezabudnite na dostatocnu robustnost
                                    zapojenia a teplotnu simulaciu v
                                    klimatickej komore. Co keby ledky
                                    prestali svietit pri -10C...?! :)))<br>
                                    <div> <br>
                                    </div>
                                    <div>A.<br>
                                      <br>
                                    </div>
                                  </div>
                                  <div class="gmail_extra"><br>
                                    <div class="gmail_quote">2014-10-27
                                      14:49 GMT+01:00 Jiří Nesvačil <span
                                        dir="ltr"><<a
                                          moz-do-not-send="true"
                                          href="mailto:nesvacil@posys.eu"
                                          target="_blank">nesvacil@posys.eu</a>></span>:<br>
                                      <blockquote class="gmail_quote"
                                        style="margin:0 0 0
                                        .8ex;border-left:1px #ccc
                                        solid;padding-left:1ex">
                                        <div text="#000000"
                                          bgcolor="#FFFFFF">
                                          <div>A nestacilo by takto ?<br>
                                            <img
                                              src="cid:part5.08090104.04040807@posys.cz"
                                              alt=""><br>
                                          </div>
                                          Odpor R=10ohm, C?<br>
                                          <br>
                                          Ono davat ke kazde Ledce
                                          civku+ Low esr kondik. To se
                                          zase prodrazi, pokud tam ma
                                          byt RGB Ledka tj. vse 3x. Jde
                                          jen o to, aby ta ledka
                                          vydrzela nejaky puls 35VDC,
                                          energie-puls omezen tim
                                          kondikem. Pokud LED vymeni
                                          energii za svetelenou ?<br>
                                          <br>
                                          Jirka<br>
                                          <br>
                                          <br>
                                          <br>
                                        </div>
                                        <br>
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