Re: dc-dc converters +12V -12V for ISA sound card

From: "Peter Havelaar" <
>
Date: Wed, 7 Nov 2001 15:52:36 +0100

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For the home-soldering kind of guys (girls)
http://w1.859.telia.com/~u85920178/blocks/vconv-00.htm

for the complete page:
http://w1.859.telia.com/~u85920178
  ----- Original Message -----=20
  From: =20
  To: =20
  Sent: Wednesday, November 07, 2001 9:15 AM
  Subject: dc-dc converters +12V -12V for ISA sound card

  Hi everyone,

  As I mentioned before I would like to use an ISA sound card on the =
PC/104 bus of an embedded motherboard. I was reminded (I apologise I =
foget by whom) that although PC/104 is electrically identical to ISA =
signal-wise, it does not supply +12V (or presumably -12V) required for =
ISA sound cards.

  The current draw is relativly low, so a 5V to 12V tiny DC-DC converter =
solves the +12V problem, is there such a thing as a 5V to -12V or -5V to =
-12V DC-DC converter to handle the -12V? Does it go under a different =
name because I can't see any here. Or can I use a 5V to 12V one =
backwards on the -5V to produce -12V?

  Regards,

  Nick

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<META content=3D"MSHTML 5.50.4807.2300" name=3DGENERATOR>
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>For the home-soldering kind of guys=20
(girls)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2><A=20
href=3D"http://w1.859.telia.com/~u85920178/blocks/vconv-00.htm">http://w1=
.859.telia.com/~u85920178/blocks/vconv-00.htm</A></FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>for the complete page:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2><A=20
href=3D"http://w1.859.telia.com/~u85920178">http://w1.859.telia.com/~u859=
20178</A></FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title==20
  =
href=3D"mailto:"></A> =
</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title==20
  href=3D"mailto:"></A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, November 07, =
2001 9:15=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> dc-dc converters +12V =
-12V for=20
  ISA sound card</DIV>
  <DIV><BR></DIV>
  <DIV><FONT face=3DArial size=3D2>Hi everyone,</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT> </DIV>
  <DIV><FONT face=3DArial size=3D2>As I mentioned before I would like to =
use an ISA=20
  sound card on the PC/104 bus of an embedded motherboard. I was =
reminded (I=20
  apologise I foget by whom) that although PC/104 is electrically =
identical to=20
  ISA signal-wise, it does not supply +12V (or presumably -12V) required =
for ISA=20
  sound cards.</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT> </DIV>
  <DIV><FONT face=3DArial size=3D2>The current draw is relativly low, so =
a 5V to 12V=20
  tiny DC-DC converter solves the +12V problem, is there such a thing as =
a 5V to=20
  -12V or -5V to -12V DC-DC converter to handle the -12V? Does it go =
under a=20
  different name because I can't see any here. Or can I use a 5V to 12V =
one=20
  backwards on the -5V to produce -12V?</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT> </DIV>
  <DIV><FONT face=3DArial size=3D2>Regards,</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT> </DIV>
  <DIV><FONT face=3DArial =
size=3D2>Nick</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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