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<DIV><FONT face=Arial size=2>Tak sa mi to podarilo nejak dat dokopy. <A
href="http://158.193.202.11/hw/lm2576/schema.jpg">http://158.193.202.11/hw/lm2576/schema.jpg</A>.
Prud to reguluje celkom dobre.</FONT></DIV>
<DIV><FONT face=Arial size=2>Len v krajnych polohach a hlavne pri max prude sa
to blbo rozkmita <A
href="http://158.193.202.11/hw/lm2576/4.jpg">http://158.193.202.11/hw/lm2576/4.jpg</A> a
<A
href="http://158.193.202.11/hw/lm2576/2.jpg">http://158.193.202.11/hw/lm2576/2.jpg</A> (zlty
kanal je napatie na vystupe IO a modry na FB (spatna vazba)). Ked sa spin.
tranzistor zopina alebo rozopina v okamihu ked su na spetnej vazbe zakmity
tak to trocha blbne. Tie spicky sa postupne zvecsuju ako rastie prud <A
href="http://158.193.202.11/hw/lm2576/14.jpg">http://158.193.202.11/hw/lm2576/1.jpg</A> ,
<A
href="http://158.193.202.11/hw/lm2576/3.jpg">http://158.193.202.11/hw/lm2576/3.jpg</A> Ono
tie spicky su aj na vystupe (fialova) <A
href="http://158.193.202.11/hw/lm2576/5.jpg">http://158.193.202.11/hw/lm2576/5.jpg</A> a
myslim ze v tom je problem. Potrebujem to na napajanie cievok ventilov a
ked tam pripojim indukcnu zataz tak to este viac blbne. Nevedeli by ste poradit
ako tie spicky odstranit alebo v com moze byt problem? So spinanymi zdrojmi som
nerobil tak sa zide akakolvek rada.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>dakujem</FONT></DIV>
<DIV><FONT face=Arial size=2>michal</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=delphin@post.cz href="mailto:delphin@post.cz">Delphin</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=hw-list@list.hw.cz
href="mailto:hw-list@list.hw.cz">HW-news</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, August 13, 2007 2:41
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Reg.zdroj prudu s
lm2576</DIV>
<DIV><BR></DIV>> Podla DS LM2576 mam zapojeny spinany prud. zdroj. <BR>>
<A
href="http://158.193.202.11/hw/2576.jpg">http://158.193.202.11/hw/2576.jpg</A>
Potreboval by som ho prerobit tak aby <BR>> bolo mozne plynule regulovat
prud<BR>> od 0 do 2.5A.Ono treba menit zosilnenie OZ, ale ked nahradim R1 a
R2 <BR>> potenciometrom je to moc nelinearne. OZ mam pouzity TL081 ale ten
nejde na <BR>> vstupe od nuly<BR>> (musel som ho napajat zapornym
napatim) Ktory OZ by tam bol vhodnejsi?<BR><BR>OZ od 0 je treba
TS912.<BR><BR>Nebylo by lepsi porovnavat ubytek na snimacim odporu s
volitelnou napetovou <BR>referenci, nez menit zesileni ? (Jen se ptam, nevim,
jestli je to idealni)
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