digital compass modules

[Tilman Baumann]

François TOURDE wrote:
> Le 13901ième jour après Epoch,
> Schmidt András écrivait:
> 
>> Tilman Baumann wrote:
>>> Bluetooth would be nice. You would need no hardware hacks on the
>>> phone itself.
>>> Should be pretty easy to hack a bluetooth->serial converter (like
>>> BlueSMiRF from sparkfun) to the sensor. Maybe with a little
>>> microcontroller glue in between.
>>> Bluetooth is very simple to code and simple to handle.
>> I was thinking about two possible applications:
>>
>>   1. The map of a GPS map viewer application turns when you turn the
>>      machine so it is always aligned with the environment (this feature
>>      is included on some GPS tools.)
> 
> Maybe the 3D accels can do that. And the GPS can be used as a bearing
> indicator, when you move. No magnetic device needed in this case.

Gyroscopes is what you look for. ;)
Accelerameters don't see rotational movings.