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Originally Posted by Gary Dillard
Thanks. We are playing around with this as well. The IR sensor is listed as "diffuse" and the visual red sensor is listed as "retro-reflective", but the wavelengths aren't much different between the 2 sensors while the range is significantly different, so I wasn't sure if there was some difference in design that would make them behave differently.
I wasn't sure if the detection spectrum was sufficiently different that it would react better to a specific retro-reflector target while ignoring a different diffuse target (the ball) by tuning the sensitivity.
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I omitted this Banner IR sensor option:
Either sensor may be used with a reflector, i.e blocking mode. IR sensor is effective > 1' effective to detect all the ball colors, without separate Emiter / Detector (re: my earlier reply - just need to position reflector and look for loss of signal in code.)