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

[Kevin Lightner]

>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

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