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From: snyderw@pawl1.pawl.rpi.edu (Wilson P. Snyder II)
Newsgroups: sci.electronics
Subject: Tricolor LEDS
Keywords: LEDS Colors
Message-ID: <1491@imagine.PAWL.RPI.EDU>
Date: 21 Oct 88 19:19:03 GMT
Sender: news@imagine.PAWL.RPI.EDU
Reply-To: snyderw@pawl1.pawl.rpi.edu (Wilson P. Snyder II)
Organization: RPI Public Access Workstation Lab - Troy, NY
Lines: 21

Since everyone is on the topic of LEDS - I have a little problem.

I need a LED that will display RED, GREEN, and a decent YELLOW.

I have experimented with about 10 R-G Tri-Pin LEDS  (Three leads)
The problem is that none of them form acceptable yellows (the yellow
should be like a yellow LED.)

If I over drive the green element (IE 100 ma instead of 20ma)  I get a
nice yellow, but of course the LED self-destructs.

I also know about the two pin bicolor LEDS where you pass AC through the
device.  I would prefer not to have to use this type, but if I must I
must.  I expect that I will have the same problem getting good yellows though.

Oh, yes, I do need the GREEN and RED also, so don't suggest Green/Amber LEDS.



______________________________________________________________________
Wilson P. Snyder II                snyderw@pawl.rpi.EDU
15 Davis Parkway                518-276-2764
So. Burlington, VT 05403        802-658-3799 in summer (That's now)
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