[sdiy] Opamp ICs (slightly OT)

[Robotboy8 at aol.com]

>> Okay, so what about using two photoresistors and a phototransistor?
>> (thinking each component can be switched on and off to affect the
.> tone: the transistor would provide square wave output, the resistors.
>> more 'natural' output).  Is that a logical arrangement?
>
>   Had to think about that...hum, pretty cool arrangement actually,
>but that's going to be heavy on the mechanical setup.
>
>> And schematic-wise, I guess it'd be a battery going into the resistor
>> array, into an opamp (i have a LM386N on hand, will that work?) into
>> the output jack?
>Search Google for the opamp sheet.
>
>> Sorry for having so many dumb questions, but I'm anxious to get
>> started and yet want to draw out a parts-list first (and yes, I know
>> I'll need an LED as well).
>Then get some schematics.

Get some schematics, you say?  Done, thanks to RJWSoft's schematic publisher!
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?
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).
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20030925/90c0c45c/attachment.htm>