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<div class="moz-cite-prefix">Těch 60mA počítám na modul RGB led s
chipem vycházím někde z inetu podobných modulů. Ten CPU přeci může
jet na malé frekvenci, spotřeba bude řádově mA.<br>
Takovéto moduly se přibližně počítají 60mA:<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>
Samozřejmě půjde také od ledky k ledce... .<br>
<br>
Jirka<br>
<br>
<br>
Dne 27. 10. 2014 19:52, Zdeněk napsal(a):<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Nějak
v tom výpočtu chybí těch 375 MCU…<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Zdeněk<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
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>On
Behalf Of </b>Jiří Nesvačil<br>
<b>Sent:</b> Monday, October 27, 2014 7:20 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:hw-list@list.hw.cz">hw-list@list.hw.cz</a><br>
<b>Subject:</b> Re: Vanocni strom - osvetleni - dlouhe
vedeni -7805 v serii<o:p></o:p></span></p>
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<p class="MsoNormal">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>
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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