As a computer and electronics tinkerer who happens to be
blind, I have what sounds like a dumb question since I am sure
the data sheet shows it clearly in the diagram or picture but I
need to know which lead is which.

	One can feel the small lens at the top or 12 o'clock
position on the front side of the chip so it is easy enough to
tell the difference between the front and back sides of the
device but the 3 leads which come out the bottom and are theVCC,
Ground and output connections could be arranged in any order
which is fine unless one gets it wrong at which point that chip
is toast.

	So, if one is looking at the side containing the lens
and that lens is at the top and the leads are all pointing
towards 6 o'clock, so to speak, which one is which from left to
right?

	These chips convert light intensity to a frequency which
varies from 30 HZ in total darkness to 500 KHZ when the photo
diode is saturated. If you hook them up to a logic input on a PIC
or computer, one can read the frequency and determine how much
light is hitting the sensor so any processor with a spare logic
input that runs fast enough to follow the state of that input up
to 500 KHZ can use one of these in analog situations with a
minimum of external components.

	Thanks for any and all information.

Martin McCormick
--=20
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