You may want to check out http://www.precisionnav.com and the vector 2x
magnetometer that outputs (SPI) compass heading. It's relatively cheap
(~50 USD, I think). It does require an external SPI->serial circuit,
however, as you know, with a PIC + level convertor this is
straightforward...
Regards,
Ozan
--
Ozan Cakmakci
Graduate Student
Optics for Head Worn Displays
School of Optics/CREOL
http://odalab.ucf.edu/~ozan
ozan@o .............
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