Quote:
Originally Posted by JamesBrown
Seems entirely plausible to me that the LED was simply installed backwards. Bi Color LEDs are (usually at least) 3 pin, with the center being the common Cathode, and pins 1 and 3 being the two different anodes. It would be a pretty simple mistake to install the LED 180 degrees out and have the colors reversed.
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No, actually they do make two pin bi-color LEDs. The color is determined by the direction of current (so the anode of one color is the cathode of the other and vice versa). IIRC this used to be and still may be common, as they are particularly useful for driver circuits involving OP-AMP voltage comparitors; they still work for digital circuits too (if run between two outputs, one used to source, one used to sink).
That said, once again, a backwards LED would still have the same result. However, I'd think these were machine assembled which would mean that the error would have to be with the component itself (either in the reel tape backwards or somehow assembled wrong at the LED fab).
Either way, I'd consider that to be DOA and grounds for a warranty exchange.
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DISCLAIMER: Any opinions/comments posted are solely my personal opinion and does not reflect the views/opinions of FIRST, IndianaFIRST, or any other organization.