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No já třeba ne, protože běžně navrhuji vlastnà desky. Doporučil bych
kouknout ke svĂ©mu oblĂbenĂ©mu dodavateli a hledat mezi step-up šváby
pro menšà proudy. TĹ™eba pro bias malĂ˝ch OLED jsem pouĹľĂval AP3012 v
katalogovĂ©m zapojenĂ. Ale mĹŻĹľe vyhovÄ›t i nÄ›jakej step-up urÄŤenej pro
několik LEDek.<br>
<br>
Je dĹŻleĹľitĂ© dodrĹľet to, Ĺľe cĂvka má mĂt saturaÄŤnĂ proud nejmĂ©nÄ›
takovĂ˝, jakĂ˝ je max. vypĂnacĂ proud švába. Z toho plyne, Ĺľe pro malĂ©
proudy je dobré hledat šváby pro malé proudy. Může se totiž stát, že
šváb na 1,5 A je levnějšà než na 0,5, ale když se přičte cena
správnĂ© cĂvky, vyjde 0,5 A v souÄŤtu lĂ©pe. <br>
<br>
PH<br>
<br>
<div class="moz-cite-prefix">Dne 11.03.2022 v 14:47 Ondra napsal(a):<br>
</div>
<blockquote type="cite"
cite="mid:!&!AAAAAAAAAAAYAAAAAAAAAG7wD3x3nPZPlGKqGTZXKRTCgAAAEAAAAK039BUzlzFIuq+em5ZltagBAAAAAA==@seznam.cz">
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<div class="Section1">
<p class="MsoNormal"><font size="2" face="Calibri"
color="#1f497d"><span style="font-size:11.0pt;color:#1F497D">DĂky
za nápady. MÄ› šlo spĂš o to ryzĂ
bastlenĂ. Ale evidentnÄ› uĹľ kaĹľdĂ˝ sáhne po hotovĂ©m modulu.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2" face="Calibri"
color="#1f497d"><span style="font-size:11.0pt;color:#1F497D"><o:p>Â </o:p></span></font></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><font size="2" face="Tahoma"><span
style="font-size:10.0pt;
font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font
size="2" face="Tahoma"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Hw-list
[<a class="moz-txt-link-freetext" href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b><span
style="font-weight:bold">On
Behalf Of </span></b>AZE<br>
<b><span style="font-weight:bold">Sent:</span></b>
Friday, March 11, 2022 2:17
PM<br>
<b><span style="font-weight:bold">To:</span></b>
HW-news<br>
<b><span style="font-weight:bold">Subject:</span></b>
Re: schéma měniče<o:p></o:p></span></font></p>
</div>
</div>
<p class="MsoNormal"><font size="2" face="Calibri"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></font></p>
<div>
<div>
<div>
<p class="MsoNormal"><font size="2" face="Arial"
color="black"><span style="font-size:
10.0pt;font-family:"Arial","sans-serif";color:black">Předpokládám,
Ĺľe tazatel
umĂ hledat i v eshopu... <o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2" face="Arial"
color="black"><span style="font-size:
10.0pt;font-family:"Arial","sans-serif";color:black">aze<o:p></o:p></span></font></p>
</div>
<div>
<div>
<div>
<p class="MsoNormal"><font size="2" face="Tahoma"
color="black"><span style="font-size:
10.0pt;font-family:"Tahoma","sans-serif";color:black">Â <o:p></o:p></span></font></p>
</div>
<div>
<div>
<p class="MsoNormal" style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">From:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
<a href="mailto:xlibor@tiscali.cz"
title="xlibor@tiscali.cz"
moz-do-not-send="true">Libor</a>
<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal" style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">Sent:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Friday, March 11, 2022 12:32 PM<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal" style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">To:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
<a href="mailto:hw-list@list.hw.cz"
title="hw-list@list.hw.cz"
moz-do-not-send="true"
class="moz-txt-link-freetext">hw-list@list.hw.cz</a>
<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal" style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black;font-weight:bold">Subject:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">
Re: schéma měniče<o:p></o:p></span></font></p>
</div>
</div>
</div>
<div>
<p class="MsoNormal"><font size="2" face="Calibri"
color="black"><span
style="font-size:11.0pt;color:black">Â </span></font><font
size="3" color="black"><span
style="font-size:12.0pt;color:black"><o:p></o:p></span></font></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal"><font size="2" face="Calibri"
color="black"><span
style="font-size:11.0pt;color:black">No tohle jsou
izolované DC/DC měniče,
myslĂm Ĺľe autorovi šlo spĂše jen o zvýšenĂ napÄ›tĂ.<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2" face="Calibri"
color="black"><span
style="font-size:11.0pt;color:black">Libor<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2" face="Calibri"
color="black"><span
style="font-size:11.0pt;color:black">Dne
11.03.2022 v 11:40 AZe napsal(a):<o:p></o:p></span></font></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<div>
<p class="MsoNormal"><font size="2" face="Arial"
color="black"><span style="font-size:
11.0pt;font-family:"Arial","sans-serif";color:black">NevĂm,
k ÄŤemu to je, ale
různých dc/dc měničů jsou k dispozici tuny.
BěžnÄ› pouĹľĂvám 5/15V a 5/9V, to
kvůli galvanickému oddělenà a nic nekmitá. <a
href="https://www.tme.eu/cz/katalog/dc-dc-menice_100320/?id_category=100320&mapped_params=2%3A170%3B"
title="https://www.tme.eu/cz/katalog/dc-dc-menice_100320/?id_category=100320&mapped_params=2%3A170%3B"
moz-do-not-send="true">https://www.tme.eu/cz/katalog/dc-dc-menice_100320/?id_category=100320&mapped_params=2%3A170%3B</a><o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2" face="Arial"
color="black"><span style="font-size:
11.0pt;font-family:"Arial","sans-serif";color:black">aze<o:p></o:p></span></font></p>
</div>
<div>
<div>
<div>
<div>
<p class="MsoNormal"
style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black;font-weight:bold">From:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black"> <a
href="mailto:xlibor@tiscali.cz"
title="xlibor@tiscali.cz"
moz-do-not-send="true">Libor</a>
<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"
style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black;font-weight:bold">Sent:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black"> Friday, March 11, 2022
10:01 AM<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"
style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black;font-weight:bold">To:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black"> <a
href="mailto:hw-list@list.hw.cz"
title="hw-list@list.hw.cz"
moz-do-not-send="true"
class="moz-txt-link-freetext">hw-list@list.hw.cz</a>
<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"
style="background:whitesmoke"><b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black;font-weight:bold">Subject:</span></font></b><font
size="2" face="Tahoma" color="black"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black"> Re: schéma měniče<o:p></o:p></span></font></p>
</div>
</div>
</div>
<div>
<p class="MsoNormal"><font size="2" face="Arial"
color="black"><span style="font-size:
11.0pt;font-family:"Arial","sans-serif";color:black">Â </span></font><font
size="3" face="Arial" color="black"><span
style="font-size:12.0pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></font></p>
</div>
</div>
<div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Mám
dobré zkušenosti s MC34063 <a
href="http://www.nomad.ee/micros/mc34063a/index.shtml"
moz-do-not-send="true"
class="moz-txt-link-freetext">http://www.nomad.ee/micros/mc34063a/index.shtml</a><o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Se
zakmitávánĂm jsem se zatĂm nesetkal.<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Dá se
koupit za pár korun. NynĂ pouĹľĂván
klon od Diodes Inc. AZ34063<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Â <o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">NenĂ
to zakmitávánĂ zpĹŻsobeno pĹ™Ăliš
nĂzkou indukÄŤnostĂ? Pro malĂ© proudy je
potĹ™eba vÄ›tšĂ, pokud máte mÄ›niÄŤ napĹ™. na
3A tak by to mohl být důvod.<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Libor<o:p></o:p></span></font></p>
</div>
<div>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Dne
11.03.2022 v 7:14 Ondra napsal(a):<o:p></o:p></span></font></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Ahoj,
nemáte někdo ověřené schéma měniče
napětà z 5V na cca 15V do 50mA ?<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Je
jich ke koupi z ÄŤĂny dost, ale ÄŤtu o
nich, že kmitajà při takto malých
odběrech.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font size="2"
face="Calibri" color="black"><span
style="font-size:11.0pt;color:black">Nebo
máte nÄ›kdo nÄ›jakĂ˝ ÄŤĂnskĂ˝ modul
ověřený, že je „slušný“ ?<o:p></o:p></span></font></p>
</blockquote>
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</blockquote>
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