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<DIV><FONT face=Arial size=2>DOH, those of you on the vector list will have
already seen this. Sent it to the wrong list.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>For those of you not on vectorlist:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>While building up the two beta 9100 keyboard wedge
boards I realized I didn't have any 22pf caps. So I tossed a pair of 100pf
caps onto my breadboard of the circuit and everything worked great.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Then I went to build the perfboard version and
realized I only had two of the 100pf caps and as I wanted to leave the
breadboard version intact for now so I grabbed a pair of .1uf caps.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Hooked everything up and it didn't
work.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So I checked everything twice more and still no
go. Got to wondering if maybe the value of those caps is really important
and realized I have NO idea how to spec them nor even what they do.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So can anyone enlighten me?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I have seen circuits use 18pf, 22pf and 27pf for
the crystal caps. The 100pfs do work, but I wonder now if I just got
lucky.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also which should I use, simple ceramic disc or the
Monolithic ceramic disc?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>David</FONT></DIV></BODY></HTML>
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Received on Tue Oct 21 00:24:47 2003
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