[sdiy] "cute" project

[Gavin Russom]

seems like there's enough interest in this to post it on list, as I said it
shows the design for just two oscillators but it should be obvious how to
expand it, it's a rough drawing so bear with me...
----------
>From: "rab fulton" <rabster1 at ntlworld.com>
>To: "Magus Ship" <elmystico at earthlink.net>
>Subject: Re: [sdiy] "cute" project
>Date: Thu, Mar 28, 2002, 12:32 AM
>

>saw you have schematics on the list. Could you send me copy?
>Looks interesting. Are the results usable?
>thanks
>
>----- Original Message -----
>From: "Magus Ship" <elmystico at earthlink.net>
>To: "synth" <synth-diy at dropmix.xs4all.nl>
>Sent: Wednesday, March 27, 2002 3:27 AM
>Subject: [sdiy] "cute" project
>
>
>> I just built my girlfriend a little light controlled synth based on a
>wacky
>> idea I had.  I used 4 simple square/triangle oscillators with cadmium
>> sulfide cells in addition to the pot that controls the current going to
>the
>> oscillator cap.  Each of these oscillators has an LED at its out put as
>well
>> as the audio output.  The audio outputs are mixed through a summing node
>and
>> then invertered (through an inverter).  The LED's are mounted in a square
>on
>> the front panel.  The cadmium sulfide cells are mounted in a larger square
>> outside the LED's so that the light from the LED (output of one
>oscillator)
>> is controlling the frequency of the next oscillator, which is controlling
>> the next, which is controlling the first one.  It can sit and play itself
>> for hours...  Especially interesting is when the 4 are set to just below
>> audio frequency when the LED's are off, then when they turn on they push
>> each other up into audio and set off a chain reaction.  Anyway, it seemed
>> like this idea could really be expanded upon for lots of interesting
>> effects!!
>
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