I have a few projects that I'm using cds-type photocell resistors in
them. Specifically they are all digikey #PDV-P9001-ND in a simple
voltage divider circuit. I'm running them to spec, 1ma max-current etc.
They've all gotta last at least 10 years. My definition of failure would
be their specs drifting by more than about 30% In the applications they
are at worst completely uncovered and *may* be subject to UV light, but
would generally be used in a standard office environment.

I mentioned this to someone who said that photocells are unreliable and
won't last more than a year or two. He said they all fail due to light
exposure within a few years.

Seems pretty dubious to me, photocells are used in streetlamps after
all, and the datasheets don't mention anything worrying, but... What do
you guys think?

-- 
http://www.petertodd.ca
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist