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<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2 face=Arial>Dobry
den,</FONT></SPAN></DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2 face=Arial>pro
nenarocne vystupy (max 0.5A) davame darlington optoclen + vykonovy
tranzistor.</FONT></SPAN></DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial>Kolektory jsou spojeny a vyvedeny na jednu svorku, jenz se pripojuje
na napajeni, typicky +24V.</FONT></SPAN></DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial>Obvodove je to velmi jednoduche + to zajistuje plne galvanicke
oddeleni, takze odpada reseni zemnich smycek.</FONT></SPAN></DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2 face=Arial>Na
vstupech jsou pak optocleny, spise ze zvyku, jelikoz nikdy nevite, co tam budete
jeste pripojovat.</FONT></SPAN></DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=859105408-15042013><FONT color=#0000ff size=2
face=Arial>Slavek</FONT></SPAN></DIV>
<DIV><SPAN class=859105408-15042013><!-- Converted from text/plain format -->
<P><FONT size=2>Ing. Slavomir Skopalik<BR>Jednatel spolecnosti<BR>Elekt Labs
s.r.o.<BR>Sber a vyhodnoceni dat ze stroju a laboratori<BR>systemem MASA (<A
href="http://www.elektlabs.cz/m2demo">http://www.elektlabs.cz/m2demo</A>)<BR>----------------------------------------------<BR>Adresa:<BR>Elekt
Labs s.r.o.<BR>Chaloupky 158<BR>783 72 Velky Tynec<BR>Czech
Republic<BR>----------------------------------------------<BR>Mobil: +420 724
207 851<BR>icq:199 118
333<BR>skype:skopaliks<BR>e-mail:skopalik@elektlabs.cz<BR><A
href="http://www.elektlabs.cz/">http://www.elektlabs.cz</A><BR> </FONT>
</P></SPAN></DIV>
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<DIV dir=ltr lang=cs class=OutlookMessageHeader align=left><FONT size=2
face=Tahoma>-----Original Message-----<BR><B>From:</B>
hw-list-bounces@list.hw.cz [mailto:hw-list-bounces@list.hw.cz] <B>On Behalf Of
</B>hutta.j@seznam.cz<BR><B>Sent:</B> Sunday, April 14, 2013 9:55
PM<BR><B>To:</B> hw-list@list.hw.cz<BR><B>Subject:</B> Ochrana I/O jak spravne
resit?<BR><BR></FONT></DIV>Vlakno o problemech s PIC16F628A me privedlo k
tomuto dotazu.<BR><BR>Mejme MCU 3,3V jehoz noha<BR>1. ovlada tranzistor
(napriklad IRLL2705) ,spinajici zatez, typicky ventilator 12/24V 2A
.<BR>Zatez je tvale na napajecim napeti a tranzistor ji "prizemnuje".<BR>2.
vyhodnocuje stav nejakeho mechanickeho spinace nekde v zarizeni.<BR>Zatez i
spinac je pripojen pres svorky pomoci x metru vodice. <BR>MCU, zatez i
spinac jsou na spolecne zemi.<BR><BR>Jak resit ochranu MCU tak, aby procesor
pokud mozno prezil napriklad i pruzaz spinaciho tranzistoru?<BR>Cely design
byl odolny proti EM bordelu, ktery by se mohl indukovat do propojovacich
vodicu?<BR><BR>Hutta<BR><BR><BR><BR><BR><BR><BR><BR></BLOCKQUOTE><A
name=438773></A></BODY></HTML>