Well, for anyone interested in building a Segway clone, Analog Devices have just announced a 6 axis inertial sensor. http://www.analog.com/en/prod/0,2877,ADIS16355,00.html Data sheet is preliminary Rev F .... Cost is US$275, so I don't like the chances of getting a sample ... -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist