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