On Wednesday 03 March 2004 06:56 pm, Bob Ammerman scribbled:
> I wasn't referring to interrupting the beam, rather I am talking about =
the
> devices that place the LED and detector at right angles to each other a=
nd
> 'look' for something to reflect the beam from the LED to the detector.
>
> Actually, after looking at some of this stuff, I am pretty sure I am go=
ing
> to go with the QPROX sensors. They look great and simple to use.



Okay....gotcha.  The qprox does seem like a good part for this, but if yo=
u=20
want to consider IR still, check out Omron's EE-SY190.  It's an integrate=
d=20
LED/phototransistor setup at a right-angle for this purpose.  I have one =
here=20
that I intend to use to detect rain on a windshield.  Only problem is tha=
t it=20
is expensive (~$9 @ Digikey IIRC).

Cheers,
-Neil

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