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<DIV><SPAN class=875273316-27092003><FONT face=Arial color=#0000ff size=2>Hi
all</FONT></SPAN></DIV>
<DIV><SPAN class=875273316-27092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=875273316-27092003><FONT face=Arial color=#0000ff size=2>I
added some fundamental op-amp info to my site. If you are a synth-diy newbie you
might find it informative.</FONT></SPAN></DIV>
<DIV><SPAN class=875273316-27092003><SPAN class=875273316-27092003><FONT
face=Arial color=#0000ff size=2>You need to scroll down to
it.</FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=875273316-27092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=875273316-27092003><FONT face=Arial color=#0000ff size=2><A
href="http://atlas.csd.net/~rjwsoft/oddsandends.html">http://atlas.csd.net/~rjwsoft/oddsandends.html</A></FONT></SPAN></DIV>
<DIV><SPAN class=875273316-27092003></SPAN><SPAN
class=875273316-27092003></SPAN><SPAN class=875273316-27092003><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><FONT face=Arial><FONT size=2><FONT color=#0000ff><SPAN
class=875273316-27092003>Ray</SPAN><SPAN
class=875273316-27092003></SPAN></FONT></FONT></FONT></DIV>
<DIV><SPAN class=875273316-27092003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
owner-synth-diy@dropmix.xs4all.nl
[mailto:owner-synth-diy@dropmix.xs4all.nl]<B>On Behalf Of
</B>Robotboy8@aol.com<BR><B>Sent:</B> Thursday, September 25, 2003 8:51
PM<BR><B>To:</B> synth-diy@dropmix.xs4all.nl<BR><B>Subject:</B> Re: [sdiy]
Opamp ICs (slightly OT)<BR><BR></FONT></DIV><FONT face=arial,helvetica><FONT
lang=0 face=Arial size=2 FAMILY="SANSSERIF">>> Okay, so what about using
two photoresistors and a phototransistor?<BR>>> (thinking each component
can be switched on and off to affect the<BR>.> tone: the transistor would
provide square wave output, the resistors.<BR>>> more 'natural'
output). Is that a logical arrangement?<BR>><BR>> Had
to think about that...hum, pretty cool arrangement actually,<BR>>but that's
going to be heavy on the mechanical setup.<BR>><BR>>> And
schematic-wise, I guess it'd be a battery going into the resistor<BR>>>
array, into an opamp (i have a LM386N on hand, will that work?)
into<BR>>> the output jack?<BR>>Search Google for the opamp
sheet.<BR>><BR>>> Sorry for having so many dumb questions, but I'm
anxious to get<BR>>> started and yet want to draw out a parts-list first
(and yes, I know<BR>>> I'll need an LED as well).<BR>>Then get some
schematics.<BR><BR>Get some schematics, you say? Done, thanks to
RJWSoft's schematic publisher!<BR>How does this look, in all? I get the
feeling it can't possibly be this simple... though I haven't yet added the
opamp, as I can't figure out how to get the blasted thing hooked up in the
schematic; it does need a separate battery for itself, doesn't
it?<BR>Picture's at <A
href="www.freewebs.com/autophage/optschem.jpg">www.freewebs.com/autophage/optschem.jpg</A>
or <A href="www.freewebs.com/optschem.gif">www.freewebs.com/optschem.gif</A>
(same thing, different format).</FONT> </FONT></BLOCKQUOTE></BODY></HTML>