[sdiy] Vactrol projects - socketing Vactrols

[Fernando de Izuzquiza]

Good trick!

My suggestion as vactrol based project for Louis:

J. Bergfors vactrol VCF. Frequency, bandwidth and Q are controlable.
http://hem.bredband.net/bersyn/
http://hem.bredband.net/bersyn/VCBPF%20Bergfotron.png

Of course, a Buchla bandpass filter would be another suggestion.
And Scott's Mutant.

Fernando



El 02/02/2007, a las 15:41, Mike escribió:

> On the subject of Vactrols, I tried an idea which might just be  
> worth making
> an impromptu standard of.
>
> This came up because of an experiment in matching vactrols, and the  
> ability
> to change them around easily.
>
> I soldered the vactrols to 16 pin DIL headers (it works Okay-ish  
> with a 16
> pin turned pin socket used as a plug too).
>
> The convention I used was:
>
> Pin      Connection
> 1          LED + Vactrol pin 2
> 16        LED -  Vactrol pin 1
> 7          PE Cell 1/1 Vactrol pin 5
> 8          PE Cell 1/2 (or common) Vactrol pin 4
> 9          PE Cell 2/1 Vactrol pin 3
>
> This way, a dual vactrol can be used istead in the same place as a  
> single,
> if you have stock problems, and there is less likelihood of the  
> vactrol
> being zapped if plugged into a logic IC socket, and the vactrol  
> label is
> still readable.
>
> Just a thought. It might simplify PCB layout in some ways - you can  
> use an
> edited socket (with the unused pins missing) to aid routing.
>
> Does this qualify as an RFC?
>
> Mike
>