Odp: [sdiy] Vactrol question

[Roman Sowa]

I made my vactrols this way.
Actually it was a bit more effort. I put photocell to
heatshrink,
add epoxy, put LED in and heat to shrink. When epoxy
hardened
I removed the heatshrink and painted all black to keep
outside
light off the cell. I made about 50 of them 'vactrols' and
then
measured their performance i.e. resistance at constant
current.
It turned out they varried about 500% from each other, but
it was possible to match a few.

You can see it here:
http://romcio.multimania.com/m_pics/addsr_proto.jpg
little black thing with 2 sets of 2 leads on the left side
of pic.

Roman

----- Original Message -----
From: Tim Ressel <madhun2001 at yahoo.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, November 28, 2002 1:09 AM
Subject: [sdiy] Vactrol question


> Happy Turkey Day!!!
>
>
> I have some VT201 photocells. I was wondering if I
> could couple them with LEDs using heat shrink and use
> them instead of Vactrols in a phasor circuit?
>
> --Tim
>
>
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