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    <p><a
href="https://gitlab.com/jdobry/shortypen/-/blob/main/CZ_navod.pdf?ref_type=heads">CZ_navod.pdf
        · main · Jiri Dobry / shortyPen · GitLab</a></p>
    <div class="moz-cite-prefix">Dne 04.06.2024 v 13:26 Pavel Hudeček
      napsal(a):<br>
    </div>
    <blockquote type="cite"
      cite="mid:335d2f7c-5f2a-4533-a135-5fce32f9a07c@seznam.cz">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      Tohle téma jsem nějakou dobu nesledoval.<br>
      <br>
      Od prodejce jsem se dostal na<br>
      <a class="moz-txt-link-freetext"
href="https://gitlab.com/jdobry/shortypen/-/blob/main/Schematics/Schematic_shortyPen.pdf?ref_type=heads"
        moz-do-not-send="true">https://gitlab.com/jdobry/shortypen/-/blob/main/Schematics/Schematic_shortyPen.pdf?ref_type=heads</a><br>
      <br>
      A mám hloupý dotaz:<br>
      Proč je to tak složitý?<br>
      - Proč se tam vyrábí stabilizovanejch 3V3 spínaným zdrojem, když
      procesor zvládne celej rozsah 2 tužkovek?<br>
      - Proč se tam pro měřící proud používá další stabilizátor?<br>
      - Proč je tam externí ADC, když i nejlevnější STM má interní ADC?<br>
      <br>
      Ten operák budiž, ale jinak mi na orientační měření R přijdou 2
      stabilizátory zcela zbytečný. Prostě změřím Rx/Rref a je to.<br>
      <br>
      PH<br>
      <br>
      <br>
      <div class="moz-cite-prefix">Dne 04.06.2024 v 10:31 Peter Berec
        napsal(a):<br>
      </div>
      <blockquote type="cite"
        cite="mid:8c1df6c0-8b81-48ba-8af3-7595e010a78e@gmail.com">
        <meta http-equiv="Content-Type"
          content="text/html; charset=UTF-8">
        <p>Konštrukcia z <font face="Times New Roman, Times, serif">PE
            AR 03/2023:</font></p>
        <p><font face="Times New Roman, Times, serif"><a
              class="moz-txt-link-freetext"
href="https://www.laskakit.cz/stavebnice-vyhledavace-zkratu/"
              moz-do-not-send="true">https://www.laskakit.cz/stavebnice-vyhledavace-zkratu/</a></font></p>
        <p><font face="Times New Roman, Times, serif">Peter<br>
          </font></p>
        <div class="moz-cite-prefix">Dňa 3. 6. 2024 o 11:59 Michal Grunt
          napísal(a):<br>
        </div>
        <blockquote type="cite"
cite="mid:CACR8hZJjC=Os-qXkQE6kxfkhrES+XmvAzY_g-wGygc4k00pMrA@mail.gmail.com">
          <meta http-equiv="content-type"
            content="text/html; charset=UTF-8">
          <div dir="auto">Ještě jsem se postupně ze článku v AR/PE
            proklikal sem. To už se z toho co mam v šuplíku postavit dá
            a asi to vyzkouším.
            <div dir="auto">
              <div dir="auto"><br>
              </div>
              <div dir="auto"><a
href="https://www.eevblog.com/forum/testgear/finding-short-on-motherboards-with-a-shorty-(with-display)/"
                  moz-do-not-send="true" class="moz-txt-link-freetext">https://www.eevblog.com/forum/testgear/finding-short-on-motherboards-with-a-shorty-(with-display)/</a></div>
            </div>
          </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">Dne po 3. 6. 2024 9:13
              uživatel Michal Grunt <<a
                href="mailto:michal.grunt@gmail.com"
                moz-do-not-send="true" class="moz-txt-link-freetext">michal.grunt@gmail.com</a>>
              napsal:<br>
            </div>
            <blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div dir="auto">Děkuji za tip. Vypadá to zajímavě. Myslím,
                že mám už dost metod na vyhledávání tak je postupně (od
                té nejdostupnější) vyzkouším. Děkuji.</div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr" class="gmail_attr">Dne ne 2. 6. 2024
                  10:55 uživatel Z.Kobylka <<a
                    href="mailto:zdeko@seznam.cz" target="_blank"
                    rel="noreferrer" moz-do-not-send="true"
                    class="moz-txt-link-freetext">zdeko@seznam.cz</a>>
                  napsal:<br>
                </div>
                <blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div>
                    <p><font face="Times New Roman, Times, serif">Co
                        "Kkapesní vyhledávač zkratu" PE AR 03/2023 str
                        11 rozlišení 0,1mohmů v rozsahu 0-3,5Ohmů</font></p>
                    <p><font face="Times New Roman, Times, serif">Kobylka<br>
                      </font></p>
                    <div>Dne 01.06.2024 v 8:31 Michal Grunt napsal(a):<br>
                    </div>
                    <blockquote type="cite">
                      <div dir="auto">Děkuji, vyzkouším.</div>
                      <br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">Dne pá 31. 5.
                          2024 14:14 uživatel Nesvacil Jiri <<a
                            href="mailto:nesvacil@posys.eu"
                            rel="noreferrer noreferrer" target="_blank"
                            moz-do-not-send="true"
                            class="moz-txt-link-freetext">nesvacil@posys.eu</a>>
                          napsal:<br>
                        </div>
                        <blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                          <div>
                            <p>Díval jsem se a je to spíš toto <a
href="http://www.belza.cz/simple/pisk.htm"
                                rel="noreferrer noreferrer noreferrer"
                                target="_blank" moz-do-not-send="true"
                                class="moz-txt-link-freetext">http://www.belza.cz/simple/pisk.htm</a>
                              čím zkouším.</p>
                            <p>Jirka</p>
                            <div>Dne 30.05.2024 v 14:00 Michal Grunt
                              napsal(a):<br>
                            </div>
                            <blockquote type="cite">
                              <div dir="ltr">Možná spíš toto? Strana 5.
                                <div><br>
                                </div>
                                <div><a
href="https://www.ok1khl.com/storage/mladez/Soubor_stavebnich_navodu_pro_krouzky.pdf"
rel="noreferrer noreferrer noreferrer" target="_blank"
                                    moz-do-not-send="true"
                                    class="moz-txt-link-freetext">https://www.ok1khl.com/storage/mladez/Soubor_stavebnich_navodu_pro_krouzky.pdf</a><br>
                                </div>
                              </div>
                              <br>
                              <div class="gmail_quote">
                                <div dir="ltr" class="gmail_attr">čt 30.
                                  5. 2024 v 13:37 odesílatel Michal
                                  Grunt <<a
                                    href="mailto:michal.grunt@gmail.com"
rel="noreferrer noreferrer noreferrer" target="_blank"
                                    moz-do-not-send="true"
                                    class="moz-txt-link-freetext">michal.grunt@gmail.com</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 dir="auto">Není to něco takového?
                                    <div dir="auto"><br>
                                    </div>
                                    <div dir="auto"><a
href="https://www.high-voltage-lab.com/202/continuity-tester"
rel="noreferrer noreferrer noreferrer" target="_blank"
                                        moz-do-not-send="true"
                                        class="moz-txt-link-freetext">https://www.high-voltage-lab.com/202/continuity-tester</a></div>
                                    <div dir="auto"><br>
                                    </div>
                                    <div dir="auto">Nebo</div>
                                    <div dir="auto"><br>
                                    </div>
                                    <div dir="auto"><a
href="https://www.eeweb.com/continuity-tester-circuit-diagram/"
rel="noreferrer noreferrer noreferrer" target="_blank"
                                        moz-do-not-send="true"
                                        class="moz-txt-link-freetext">https://www.eeweb.com/continuity-tester-circuit-diagram/</a></div>
                                  </div>
                                  <br>
                                  <div class="gmail_quote">
                                    <div dir="ltr" class="gmail_attr">Dne
                                      čt 30. 5. 2024 7:55 uživatel
                                      Nesvacil Jiri <<a
                                        href="mailto:nesvacil@posys.eu"
rel="noreferrer noreferrer noreferrer" target="_blank"
                                        moz-do-not-send="true"
                                        class="moz-txt-link-freetext">nesvacil@posys.eu</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>Na zjištění zkratu používám
                                          multivibrátor, někde v AR bylo
                                          schéma na vstupu to má
                                          ochranné diody tj. malé
                                          napětí, hlavně slyším vybíjení
                                          kondenzátorů či zkrat.
                                          Měřidlem si nedokáži úplně
                                          představit. Menší kapacity se
                                          tím poznají hůře či menší
                                          odpory, ale oproti měření
                                          ohmetrem.... . Někde vyšel
                                          taky c-beeper, ale tady zrovna
                                          nepoužívám a nevím zda tady by
                                          byl ideální.</p>
                                        <p>Jirka<br>
                                        </p>
                                        <div>Dne 30.05.2024 v 7:10
                                          Michal Grunt napsal(a):<br>
                                        </div>
                                        <blockquote type="cite">
                                          <div dir="auto">Jaké proudove
                                            omezeni máte nastaveno?
                                            Děkuji.</div>
                                          <br>
                                          <div class="gmail_quote">
                                            <div dir="ltr"
                                              class="gmail_attr">Dne st
                                              29. 5. 2024 22:04 uživatel
                                              Jan Kuba <<a
href="mailto:honza.kuba@gmail.com"
rel="noreferrer noreferrer noreferrer noreferrer" target="_blank"
                                                moz-do-not-send="true"
class="moz-txt-link-freetext">honza.kuba@gmail.com</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 dir="ltr">Já hledám
                                                tak, že tam připojím
                                                třeba 1V a měřím napětí
                                                v jednotlivých částech
                                                napájecí sběrnice. Při
                                                větším proudu ( je třeba
                                                omezení I) 
                                                <div>už je poznat třeba
                                                  prstem nebo 
                                                  termokamerou, který
                                                  kond je ve zkratu...</div>
                                              </div>
                                              <div
id="m_-2108181517949374487m_1688072955432965373m_-9080113161777530748m_-4867192474044427739m_-3512490688857473190m_-3540294172163703170DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
                                                <table
style="border-top:1px solid rgb(211,212,222)">
                                                  <tbody>
                                                    <tr>
                                                      <td
style="width:55px;padding-top:13px"><a
href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail"
rel="noreferrer noreferrer noreferrer noreferrer noreferrer"
target="_blank" moz-do-not-send="true"><img
src="https://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif"
                                                          alt=""
style="width:46px;height:29px" moz-do-not-send="true" width="46"
                                                          height="29"></a></td>
                                                      <td
style="width:470px;padding-top:12px;color:rgb(65,66,78);font-size:13px;font-family:Arial,Helvetica,sans-serif;line-height:18px">Neobsahuje
                                                        žádné viry.<a
href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail"
style="color:rgb(68,83,234)"
rel="noreferrer noreferrer noreferrer noreferrer noreferrer"
target="_blank" moz-do-not-send="true">www.avast.com</a></td>
                                                    </tr>
                                                  </tbody>
                                                </table>
                                              </div>
                                              <br>
                                              <div class="gmail_quote">
                                                <div dir="ltr"
                                                  class="gmail_attr">st
                                                  29. 5. 2024 v 21:54
                                                  odesílatel Michal
                                                  Grunt <<a
href="mailto:michal.grunt@gmail.com"
rel="noreferrer noreferrer noreferrer noreferrer noreferrer"
                                                    target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">michal.grunt@gmail.com</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 dir="auto">Mám tu
                                                    jeden notebook,
                                                    který se chová tak,
                                                    že po zmacknuti
                                                    tlacitka pro zapnutí
                                                    se na 1-5 vteřin
                                                    zapne a ihned vypne.
                                                    Po vyzkoušení
                                                    takoveho toho bezne
                                                    uzivatelsky mozneho
                                                    (jina pamet atd.)
                                                    jsem vyndal desku.
                                                    Vypadá to, že je ve
                                                    zkratu část za
                                                    menici napětí, které
                                                    napájí CPU.
                                                    <div dir="auto"><br>
                                                    </div>
                                                    <div dir="auto">Předpokládejme,
                                                      že je na vine
                                                      nějaký z
                                                      kondenzátoru.
                                                      Desku jsem
                                                      prohlédl pod
                                                      mikroskopem a
                                                      žádnou destrukci
                                                      něčeho jsem
                                                      nenašel. Ani žádný
                                                      náznak.
                                                      <div dir="auto"><br>
                                                      </div>
                                                      <div dir="auto">Kondenzátory
                                                        pod CPU a část
                                                        kondenzátoru za
                                                        menici jsou ve
                                                        zkratu. Před
                                                        menici jsou v
                                                        pořádku (mysleno
                                                        tak, ze napajeci
                                                        konektor ve
                                                        zkratu neni). Na
                                                        desce je měničů
                                                        více, ale
                                                        postižené jsou
                                                        ty v uctite
                                                        části desky.
                                                        Dohromady asi 40
                                                        kondenzatoru
                                                        plus ty pod CPU.</div>
                                                      <div dir="auto"><br>
                                                      </div>
                                                      <div dir="auto">Jak
                                                        v nich najít ten
                                                        problémový?
                                                        Osahat jsem to
                                                        DM v režimu
                                                        ohmetr a v
                                                        určitě části
                                                        jsem nameril
                                                        minimální odpor.
                                                        Ale i tak jde o
                                                        dost kusů
                                                        kondenzátoru.
                                                        Pak tu mám ještě
                                                        tuto konstrukci</div>
                                                      <div dir="auto"><br>
                                                      </div>
                                                      <div dir="auto"><a
href="http://mcu.cz/news.php?extend.1242.3"
rel="noreferrer noreferrer noreferrer noreferrer noreferrer"
target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">http://mcu.cz/news.php?extend.1242.3</a></div>
                                                      <div dir="auto"><br>
                                                      </div>
                                                      <div dir="auto">která
                                                        meri miliohmy,
                                                        ale s tím jsem
                                                        toho take moc
                                                        nenašel nebo s
                                                        tím v tomto
                                                        režimu neumí...
                                                        Viděl jsem videa
                                                        jak s tím autor
                                                        zkraty hledá či
                                                        blíže
                                                        lokalizuje, ale
                                                        nějak se nedaří.</div>
                                                      <div dir="auto"><br>
                                                      </div>
                                                      <div dir="auto">Snad
                                                        tam "injektovat"
                                                        napětí postupne
                                                        na ruzna mista a
                                                        měřit odběr?</div>
                                                    </div>
                                                  </div>
                                                </blockquote>
                                              </div>
                                            </blockquote>
                                          </div>
                                        </blockquote>
                                      </div>
                                    </blockquote>
                                  </div>
                                </blockquote>
                              </div>
                            </blockquote>
                          </div>
                        </blockquote>
                      </div>
                    </blockquote>
                  </div>
                </blockquote>
              </div>
            </blockquote>
          </div>
        </blockquote>
      </blockquote>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
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