In article ,
Brian Gaff wrote:
Well it was many years ago, when I bought some super bright red leds for
power indicators on some home built devices. After about a year or so,
they had dimmed. Its of course hard to say exactly what had happened
but it seemed to me that although LEDs do run quite cool you can still
feel heat on their bodies when in use, so maybe there is either a
chemical change in the material, or the interface with the body
material that changes over time due to either cycling or just prolonged
heating.

I have seen some pretty old indicator LEDs that are no longer in the first
flush of youth. But then they were usually driven fairly hard. This is the
first similar I've seen that gave problems after such a short time -
especially since they were gently driven.

--
*I have my own little world - but it's OK...they know me here*

Dave Plowman London SW
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