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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=CS link=blue vlink=purple><div class=WordSection1><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><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><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 [mailto:hw-list-bounces@list.hw.cz] <b>On Behalf Of </b>Jiří Nesvačil<br><b>Sent:</b> Monday, October 27, 2014 7:20 PM<br><b>To:</b> hw-list@list.hw.cz<br><b>Subject:</b> Re: Vanocni strom - osvetleni - dlouhe vedeni -7805 v serii<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><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></div><p class=MsoNormal><o:p> </o:p></p></div></body></html>