On Sat, 25 Apr 2009 11:52:31 -0500, Don Foreman
wrote:

AxMan often has Cadmium Sulfide photosensors. .

What a neat place to go rooting in. My son introduced me to it when I
visited him at the Univ of MN when he was there for a summer
engineering program a couple of years ago. That and Cheapo, the used
CD place.

RWL