Quote:
Originally Posted by John_H
Figuring out common anode or common cathode should be straightforward but not without a little probing. I was honestly surprised they didn't use a 2-pin LED, greed biased one way, red biased the other, yellow from a rapid switch between the two polarities.
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I'm pretty sure it's a shared cathode/ground wire, but will check this weekend when I'm in there.

As I recall the LED wires were red/black/green, which would imply to me a common ground, assuming they made the wires actually match the function.
I'm not too surprised by the use of a 3-line vs 2-line. Back in the day when they first came out there were known as 2-color LEDs, since only one color could be "on" at a time. Then a wise acre figured out if you put AC across it, it blended both into "yellow", and suddenly it was tri-color.
Now most manufactures make a 3-line version for the exact same price as the 2-line version. Since it's easier in a pure DC system to just enable one, the other, or both, most use the 3-line version now. Why bother with an RC circut or a 555 to oscilate an LED when you can just logically drive 3 all colors with 2 bits right off the PIC?
I'll look for the manufacture on the plastic when I'm in there this weekend if cube doesn't beat me to it.