How Capacitive Touch Sensing Works

"At the heart of any capacitive-sensing system is a set of conductors which interact with electric fields. The tissue of the human body is filled with conductive electrolytes covered by a layer of skin, a lossy dielectric. It is the conductive property of fingers that makes capacitive touch sensing possible."

An interesting article, but it is a long one, and a little complex. I recommend if you some time on your hands to read it, because it explains how touchpads like on most laptops and the iPod work.

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