+PS2 to USB: http://geekhack.org/showwiki.php?title=Island:14618
+ADB to USB: http://geekhack.org/showwiki.php?title=Island:14290
+
+The project is heavily based on PJRC USB Keyboard/Mouse Example and
+owes a debt to preceding keyboard firmware projects.
+http://www.pjrc.com/teensy