pulsing 3-color LED''s

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Hi Sean,

I was thinking of somehow adjusting the pulse rate from a 555 by
changing the voltage on the RC circuit that makes up the triggering ?

I have not worked it out, but was thinking that there should be a way
to do that.

Dave



--- In basicstamps@yahoogroups.com, "Sean T. Lamont .lost."
<lamont@a...> wrote:
>
> I'd like to do something like strobe a handful of 3-color led's so
I can
> do smooth color fading. This looks, I think, something like pulsing
out 3
> simultaneous pulsout's per LED.
>
> Obviously, with a 555 timer and some cap's, one could do a constant
pulse,
> and with a stamp or a pic dedicated per each channel of pulse, one
could
> do it from a master microcontroller, but I'm wondering if there's
some
> better way to do it since even PIC's would be somewhat expensive
for this
> task, and 555's aren't programmable.
>
> Is there something like an IC which will pulse continuously that
can be
> programmed to the pulse duration? Is there another methodology I
could
> use?
>
> Sean T. Lamont, Chief Mad Scientist |-- lamont@a...
> Zen Chemical Productions |--
http://www.zenchemical.com
> Fabricators of Unnecessary Amazement