[sdiy] MIDI/CV sync LED lit plastic panel?

[harry]

Ahhh... you want a voltage to pulse width converter. Its easy. You need
a
triangle or sawtooth wave (only one per synth) at a fixed (you choose
it) frequency... and a comparator for each LED channel. You make it work
so that increasing voltage equals a longer pulse... then drive all the
LED from a transistor on the
comparator output.

Caveat: This is a "switching" power supply. Unless you are careful, all
these modulated LEDs are going to wreak havoc with your power supply and
or
radiate into the audio. It is the best and most efficient way to
modulate an
LED intensity.

H^) harry

denshi wrote:

> > the paia midi2CV. One mode allows 8 CCs to be
> > converted. Generating
> > Hundreds of CVs from MIDI will get a little
>
> yes, i had planned on using the Paia 9700.  and since
> im probably going to use red, yellow, blue and white
> LEDS (and possibly green ans blue) thats only 4-6
> channels of CV, they can all be chained im assuming
>
> my question wasnt about MIDI/CV converters, it was
> about translating the CV to the LEDs intensity.  it
> seems like it should be a simple thing!
>
> denshi
>
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