Added public domain notice

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Tom Igoe 2010-02-24 03:26:55 +00:00
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* center pins are attached to analog pins 0 and 1, respectively
* side pins attached to +5V and ground, respectively.
This example code is in the public domain.
http://www.arduino.cc/en/Tutorial/RowColumnScanning
see also http://www.tigoe.net/pcomp/code/category/arduinowiring/514 for more