[sdiy] New filter circuit on my site

[Scott Gravenhorst]

Connecting the LEDs in series would guarantee identical current through
each one.  Whether the light output of the LEDs is identical is another
matter.  Using separate resistors would allow you to trim for the
difference in LED output.  So to me, it depends on how closely the
vactrols are matched.

"Dana Scott" <danas at egosys.com> wrote:
>I would try giving each LED its own resistor
>-Dana
>
>
>> The LEDs of the vactrols are electrically in parallel, 
>> doesn't this cause a lot of difference between the two filter sections?
>> Or are the vactrols matched ?
>> 
>> Theo
>> 
>> 
>> From: <synth at charlielamm.com>
>> 
>> > Vactrol based VCF.
>> > 
>> > http://www.charlielamm.com/synth/#vactrolvcf
>> > 
>> > Includes 1 min 30 sec (approx) MP3 sound demo of various uses for the
>> > filter.
>> > 
>> > ....feedback appreciated.  Thanks....
>> > 
>> > --CL
>> > 
>> 
>
>

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