Homebrew Vactrols

[Jules Ryckebusch]

I have used Green LED's with good results. Built a Phase shifter that way.
Thge key is to have a low on resistance woth the LDR. Use a ohm meter and be
sure to roughly match them.

Jules

René Schmitz wrote:

> Hi all,
>
> inspired from Grants "Assimilator" filter, and after realizing that I have
> never worked much with LDRs/Vactrols, I have started to experiment with
> LDRs driven from LEDs.
>
> What is the best LED color for driving a CdS LDR? So far I only tried
> orange ones.
> Or to put it the other way, at what wavelenghts has the CdS the highest
> sensitivity?
>
> Are there any good reasons to use an off-the-shelf vactrol instead of a
> roll-your-own?
>
> Bye,
>  René
>
> transconductance | uzs159 at uni-bonn.de
> isfutilepreparet | http://www.uni-bonn.de/~uzs159
> obeassimilated.. | http://members.xoom.com/Rene_Schmitz