PS2-USB-Wandler für Tastaturen und ähnliches
http://www.schatenseite.de/dulcimer.html?L=2
http://gis.sakura.ne.jp/sunkey/sunkey_e.html
http://www.ixbat.de/index.php?page_id=98
http://www.atmel.com/dyn/resources/prod_documents/doc1235.pdf
http://www.scienceprog.com/interfacing-pc-keyboard-to-avr-microcontroller/
http://www.eetindia.co.in/ART_8800384851_1800004_AN_4a7a0ce8.HTM
http://www4.informatik.uni-erlangen.de/Lehre/WS03/V_BS/oostubs/web/aufgaben/aufgabe1/tastatur.shtml
http://www.atmel.com/dyn/resources/prod_documents/doc7602.pdf
http://hunt.net.nz/users/darran/weblog/329aa/Arduino_PS2_to_USB_Keyboard.html
http://hunt.net.nz/users/darran/weblog/b3029/Arduino_UNO_Keyboard_HID_version_03.html
http://www.usb.org/developers/devclass_docs/Hut1_11.pdf
https://github.com/anlif/Model-M-USB
http://oe1dwj.net/wordpress/?p=105
http://www.watterott.com/de/Atmega32u4-Breakout-Board
http://www.mikrocontroller.net/articles/Aktiver_PS/2_Tastatur_Umschalter
https://github.com/makestuff/p2ukbd
http://41j.com/blog/2011/10/a-programmable-keyboard-controller/