I have an idea for a computer case mod, but I need some orange LEDs. I
have found two kinds though. There are some labeled Amber which have
wavelengths of 585nm, and there are others labeled Orange with
wavelengths of 605nm. Which one of these would be closer to University
of Tennessee orange (a light orange)? I can get the "Orange" color for
about half the price of the "Amber" color, but I was wondering if
anybody could give me your opinion on which color to choose. Thanks,
Chris

Find the CIE color of Tennessee orange.. there should be a way to pick
that color in a paint program... once you know the RGB levels to get
that color, you could be able to dial it in on R,G and B leds using pwm
to tweak the br levels on ea led.

BobG wrote:
Find the CIE color of Tennessee orange.. there should be a way to pick
that color in a paint program... once you know the RGB levels to get
that color, you could be able to dial it in on R,G and B leds using pwm
to tweak the br levels on ea led.


I'm not using any LED driver, just wiring the LEDs up to the computer
power supply, so I don't have that much control. I just need to know
which would be closer to UT orange, the 585 nm "Amber" LEDs or the 605
nm "Orange" LEDs. I checked again and I'm saving about $2 by going with
the "Orange" kind, but I would rather have a color closest to the light
UT orange. Thanks,
Chris

On Thu, 24 Mar 2005 20:05:47 -0600, Chris Fonville wrote:

BobG wrote:
Find the CIE color of Tennessee orange.. there should be a way to pick
that color in a paint program... once you know the RGB levels to get
that color, you could be able to dial it in on R,G and B leds using pwm
to tweak the br levels on ea led.


I'm not using any LED driver, just wiring the LEDs up to the computer
power supply, so I don't have that much control. I just need to know
which would be closer to UT orange, the 585 nm "Amber" LEDs or the 605
nm "Orange" LEDs. I checked again and I'm saving about $2 by going with
the "Orange" kind, but I would rather have a color closest to the light
UT orange. Thanks,

Why not get one of each, and look?

Good Luck!
Rich

Rich Grise wrote:
On Thu, 24 Mar 2005 20:05:47 -0600, Chris Fonville wrote:


BobG wrote:

Find the CIE color of Tennessee orange.. there should be a way to pick
that color in a paint program... once you know the RGB levels to get
that color, you could be able to dial it in on R,G and B leds using pwm
to tweak the br levels on ea led.


I'm not using any LED driver, just wiring the LEDs up to the computer
power supply, so I don't have that much control. I just need to know
which would be closer to UT orange, the 585 nm "Amber" LEDs or the 605
nm "Orange" LEDs. I checked again and I'm saving about $2 by going with
the "Orange" kind, but I would rather have a color closest to the light
UT orange. Thanks,


Why not get one of each, and look?

Good Luck!
Rich



It's not the LEDs that are expensive, just the shipping. I'd be
spending $3 just to look then another $7 or so for an order of 10 LEDs.
I just thought someone might be able to save me alittle money. Thanks,
Chris

On Thu, 24 Mar 2005 22:26:30 -0600, Chris Fonville wrote:
Rich Grise wrote:
On Thu, 24 Mar 2005 20:05:47 -0600, Chris Fonville wrote:

I'm not using any LED driver, just wiring the LEDs up to the computer
power supply, so I don't have that much control. I just need to know
which would be closer to UT orange, the 585 nm "Amber" LEDs or the 605
nm "Orange" LEDs. I checked again and I'm saving about $2 by going
with the "Orange" kind, but I would rather have a color closest to the
light UT orange. Thanks,

Why not get one of each, and look?

It's not the LEDs that are expensive, just the shipping. I'd be
spending $3 just to look then another $7 or so for an order of 10 LEDs.
I just thought someone might be able to save me alittle money.
Thanks,

If you sweet-talk a salesman, he might drop a few of each in an envelope
and drop it in the mail for you. On _his_ thirty-nine cents. :-) I've had
them do that with fairly valuable parts - it's called "sampling". Just let
him get the impression that it could lead to 1M/year orders. ;-)

Good Luck!
Rich