homebrew vactrols

[Ian Fritz]

Hi Paul --

----- Original Message -----
From: "Paul Perry" <pfperry at melbpc.org.au>
To: <synth-diy at node12b53.a2000.nl>
Sent: Monday, April 17, 2000 6:31 AM
Subject: Re: homebrew vactrols

> Any solid state physicists here?

Yes.


> I wonder whether a mixture of say red & green
> can make a LDR reach a lower resistance than
> an equal amount of only one color?

It's just the number of excited free carriers that determines the
resistivity. What color light they are produced with doesn't matter.
However, the rate at which carriers are produced, of course, does depend on
the wavelength and intensity of the light. There could also be issues with
illumination uniformity at low levels.

  Ian