English: When n parallel conductors are twice folded over each other, a square array is formed in the central region, composed of (n^2 - n) /2 unique intersections. This layout can be used for a diagonally wired projected capacitance touchscreen. Alternatively, complementary pairs of LEDS can be placed at these intersections, forming a Charlieplexed LED array of (n^2 - n) uniquely addressable LEDS.
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