Analogue-sequencer

--- In analogue-sequencer@yahoogroups.com, "Colin Fraser" <colin@...>
wrote:
> Fading is normal - each pixel has lifetime that reduces while it is
turned
> on.
> According to the datasheet - "The Half-Brightness Decay life will longer
> than 10k hours in room temp."
> Experience suggests this claim was a bit optimistic.
> The sudden failure mode that affects some displays is just the icing
on the
> 'never use a new technology until it's had a few years to prove itself'
> cake.

As a follow-up to this and the other PLED posts today, I gave a brand
new, still in the pink bubble wrap and with the protective coating
PLED a go in Ivan's P3 and it is just simply blank. The P3 sees it
because it boots successfully, but the display shows nothing.

The production date on both of the PLEDs I've been working with in
this P3 is 19-Mar-2005. I'm thinking the issue is also related to
general age of the modules, not just power-on time.

Slightly related, the MIDIbox SID-NUXX design I did uses a 2x20 PLED
also from Crystalfontz, and all of those are still working just fine.
They were all purchased in mid-2006.

-Steve