[sdiy] Speaking of LEDs...

[harrybissell]

Use one of those new RGB leds and make it morph through a rainbow...
in curved air (perhaps) ?

H^) harry

John L Marshall wrote:

> And, if the voltage is wagging (going positive then negative fast enough)
> get colors between the two.
>
> Take care,
> John
> www.sound-photo.com
> ---------------------------------------------------------------------------
>
> ----- Original Message -----
> From: "patchell" <patchell at silcom.com>
> To: "Peter Grenader" <petergrenader at mksound.com>
> Cc: <synth-diy at dropmix.xs4all.nl>
> Sent: Thursday, February 06, 2003 7:41 PM
> Subject: Re: [sdiy] Speaking of LEDs...
>
> >     There is no problem, the diode will always be forward biased, you just
> need
> > to make sure you don't exceed the maximum current.
> >
> >     But, here is a sugestion...if the voltage can go both positive and
> negative
> > about ground, use a two lead-bi color LED and tie it to ground instead
> of -12.
> > That way, when the voltage is positive, you will get one color, when
> negative,
> > another...
> >
> > Peter Grenader wrote:
> >
> > > Question for the masters:
> > >
> > > How lame is it that I am driving an LED with 20 volts across it and a 2k
> > > current limit?
> > >
> > > We thinks that before too long, it will be blown to smitherens and
> become a
> > > zener. I was thinking of putting a few 1N4148's in there in series with
> it
> > > to lessen its load.
> > >
> > > What I want to do is a cheap and dirty way to show the level of a smooth
> > > random voltage, which will fluctuate between these two rails (about +8
> volts
> > > to -12).  I am currently driving this with a unity gain op amp.
> > >
> > > to see the specific application, go here:
> > >
> > > http://www.buzzclick-music.com/sample_hold.jpg
> > >
> > > Any suggestions?  OK the way it is?
> > >
> > > thanks in advance,
> > >
> > > Peter
> >
> > --
> >  -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *I'm sure glad Merry Christmas comes just once a year
> > * -Yogi Yorgensen
> > ------------------------------------------------
> >
> >