[sdiy] Vactrol (opt align) VCF rev 2: help needed

[Harry Bissell Jr]

In these circuits the rectified audio is the frequency
drive. Its a compressor so the higher the voltage, the
brighter the EL panel and the more compression you
get.

No inverter needed (just a whopping high audio
voltage)

I'm not even sure that rectification is necessary at
all...

H^) harry


--- Kevin Lightner <synthfool at synthfool.com> wrote:
> >From: jhaible at debitel.net
> [mailto:jhaible at debitel.net]
> >>  Good point, Harry, I didn't think about that!
> >>  So mouting LDRs on EL panels may still have some
> advantage
> >>  over LED/LDR vactrols even today!
> >
> >Hmm.  To drive an EL panel you'd have to frequency
> >modulate an AC voltage.  A conventional VCO would
> actually
> >work, if (1) its CV input response is fast enough,
> and
> >(2) you can figure a way to boost the output to
> about
> >150V P-P.
> 
> Fwiw, this works and by changing the freq, some
> displays will become 
> bluer or greener or whatever.
> I have some EL panels that do just this. Weird.
> 
> -- 
> Regards,
> Kevin Lightner
> 
> Myself: http://www.synthfool.com
> Service and sales:
> http://www.moogmusic.com/service.php
> Sales: http://www.cluboftheknobs.com
>