voltage controlled resistors

[tomg]

> This might be a stupid idea, but has anyone ever built a simple "voltage
> controlled resistor" that, with a switch, could override a potentiometer?
is
> this possible? it would be nice to have lfo's controlling as many things
as
> possible :)
>
> -walter carpenter

Hi Walter,

It doesn't work quite like that...The solution is making everything
voltage controllable to begin with.  Once when I was talking to John
Blacet about something, he said "We only use 50K pots." I was
shocked "What" I said "How do you glide on 50K?" Well he never
answered (that's the way stuff like that goes...I'm sure he ment to
but got side tracked talking about whatever it was we were
discussing ). The answer to my question was.. voltage control.

I just got my new "Dual VC-Glide" and "Dual VC-Ramp" modules
of the bench. It was pretty tough to get the glide symmetrical meaning
it takes the same amount of time to go 2-octaves up as 2-octaves
down...but I did it and I did it with a 50K pot.

About the only real solution to your question is using something like
the CLM-6000 (LED/LDR). For something like a balance control
use two and invert one of the CLM-6000s so one increases in
resistance as the other decreases.

Tom