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Originally Posted by deltacoder1020
the best way to find out is experimentation - hook a banner up to the edubot or the frc, write some code to echo the input, and watch the output console while playing around with the height.
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Even better, just hook up the power and ground leads of one of the sensors to a 9 volt battery. You don't need to hook it up to a controller to tell when it's seeing it's reflection. It has a little LED on the front of it that will indicate what it's seeing.