<HTML><FONT FACE=arial,helvetica><FONT SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">>> 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></HTML>