see also:

• http://www.hut.fi/~then/circuits/joystick.html
• http://www.oz.net/~wottenad/wheel2.htm
• http://meritbbs.rulimburg.nl/Fun/pedals/pedals.htm
• http://www.suncominc.com:80/technical/technical.html
• http://www.nomius.com:80/~biggun/faq.htm