Hello i'm looking to use 3 or 4 Sharp 2Y0A21 IR sensors to map height within an area of 115cm long x 55 High, when the user lowers there hand I want it to alter a parameter (say pitch, velocity etc) . There will be 12 'strings' laser beams in use so 1 IR sensor to 3 or 4 laser beams how could I go about this thanks