Thread: DIY digital compass: electronics experts needed!
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jjx is offline jjx
2009-11-06 , 03:17
Posts: 474 | Thanked: 283 times | Joined on Oct 2009 @ Oxford, UK
#94
Originally Posted by attila77 View Post
1. Dead reckoning with a single accelerometer is trouble. You'd really need a gyro, accelerometers will give you onyl translation, but not rotation.

2. If you walked 20ft with GPS on, you'd have a direction anyway There is just one assumption to make - that the device was in front of you.
Or two accelerometers as far apart as possible in the phone. A magnetic bearing gyro sounds like it would give better results though. But then again, silicon accelerometer == no separate moving parts to fail.

You'd need to integrate the accelerometer measurements, which I'd think would have to be done continuously by the electronics to have a chance at being accurate.
Last edited by jjx; 2009-11-06 at 03:18. Reason: typo