I've noticed an higher output rate when my notebook (which feeds the arduino) is connected to the electricity grid, instead of be powered only by battery.
This could be the result of a 50 Hz (60 Hz) signal being induced on the floating pin.
Thanks. This is quite useful to me Marco, as I have been making a series of "psychic" toys, such as an 8 ball, I Ching, and Weegee board. I have been utilizing non-matching pairs of analogReads() of floating analog pins, but missed discarding data adjacent to an endpoint. I will add that now. I'll study your code further, it looks very slick!
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