Hi!
A compass module would be very nice with many applications!
I have no hardware related experince. Is it possible to integrate a chip
like this into the phone? How would you do that?
Jeff Andros wrote:
sparkfun has a few, this one jumped out at me, but check out the rest
Am Mi 23. Januar 2008 schrieb Schmidt András:
Hi!
A compass module would be very nice with many applications!
I have no hardware related experince. Is it possible to integrate a chip
like this into the phone? How would you do that?
True drop-in solution
Simple I2C interface
2.7 to 5.2V
On 23/01/2008, Schmidt András [EMAIL PROTECTED] wrote:
Hi!
A compass module would be very nice with many applications!
I have no hardware related experince. Is it possible to integrate a chip
like this into the phone? How would you do that?
from the data sheet, this appears to connect via
joerg schrieb:
Am Mi 23. Januar 2008 schrieb Schmidt András:
Hi!
A compass module would be very nice with many applications!
I have no hardware related experince. Is it possible to integrate a chip
like this into the phone? How would you do that?
True drop-in solution
Simple I2C interface
Hi!
I was thinking about the same problem. But once I have seen a working
compass in a phone already (we have crossed thick woods following the
compass :-) - it was a friend's phone, I think a Nokia). So it is not
impossible to integrate into a phone.
In my opinion:
1. The GSM is not
Am Mi 23. Januar 2008 schrieb Nils Faerber:
I doubt that such a device would work in the phone, sorry.
The GTA01 contains three loadspeakers with magnets, AFAIK GTA02 will
still contain at least two. Then there is massive EM radiation from the
GSM antenna which will interfere and finally
Schmidt András wrote:
Hi!
A compass module would be very nice with many applications!
I have no hardware related experince. Is it possible to integrate a chip
like this into the phone? How would you do that?
Bluetooth would be nice. You would need no hardware hacks on the phone
itself.
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
I'm not sure a magnetic sensor is useful when you have a GPS, because a GPS
can give you a heading as soon as the measured velocity is not zero!
However I think it's possible to calibrate a magnetic sensor so that it
forgets its close magnetic environment and is only sensitive to the intented
Hello,
Citeren Schmidt András [EMAIL PROTECTED]:
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.)
A handheld GPS use the change in position measured by GPS to
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
Sébastien Lorquet wrote:
I'm not sure a magnetic sensor is useful when you have a GPS, because
a GPS can give you a heading as soon as the measured velocity is not zero!
It is true when you use it in a car when cruising with normal speeds.
When you are using your GPS on foot (installed with a
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.
Am 23.01.2008 um 14:37 schrieb Sébastien Lorquet:
I'm not sure a magnetic sensor is useful when you have a GPS,
because a GPS can give you a heading as soon as the measured
velocity is not zero!
It is exactly useful for this reason: if you are not travelling by
car but as a pedestrian,
On Wednesday 23 January 2008, Schmidt András wrote:
François TOURDE wrote:
Right! That was an other possible solution I was thinking about. Though
I think that algorithm should be very carefully implemented (a very
sensitive regulator filter) not to accumulate the measurment error of
the
Frans Grotepass wrote:
On Wednesday 23 January 2008, Schmidt András wrote:
I am
not even sure it is possible.
GPS combined with INS? I think the accelerometers aren't accurate enough for
INS
I have the same opinion though I don't know what INS resolves to :-).
Could you tell what
On Wednesday 23 January 2008, ground control picked up the following
transmission from [EMAIL PROTECTED]:
Citeren Schmidt András [EMAIL PROTECTED]:
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
Am Mi 23. Januar 2008 schrieb Sébastien Lorquet:
I'm not sure a magnetic sensor is useful when you have a GPS, because a GPS
can give you a heading as soon as the measured velocity is not zero!
You get heading of *velocity vector*, NOT heading of *device*! So for Andras'
intended use, this is
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
Am Mi 23. Januar 2008 schrieb Tilman Baumann:
François TOURDE wrote:
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.
As stated in prev posting, GPS _can_not_ deliver bearing of device at all.
Imagine
Le 13901ième jour après Epoch,
Tilman Baumann écrivait:
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
You cannot calculate North (or any Heading) from Accelerometer data.
You need a 3D Gyroscope (or 3 Gyros on 3 orthogonal axis). With this
you can detect the orientation of the gyro relative to earth's
rotational axis, and calculate gyroscope north from that. This is
the same as true north if
On Wednesday 23 January 2008, Denis wrote:
I think the accelerometers don't provide enough accuracy.
For INS you need both 3d axial as rotational accelerometers. For a quick check
how it works, check out the wikipedia.
One of the first big uses was Nautilus under the Polar ice cap. The combo
The Nokia 5140 has a compass that works in the conventional method, by
reading the Earth's magnetic field vectors.
http://europe.nokia.com/A4144100
See the user guides, which are made with Flash... :o
Here is a page in Finnish with more information about the compass .. sorry,
couldn't find this
i've got a project in mind for when my neo freerunner arrives, that
needs a digital compass. only a simple thing, probably 3 degree
accuracy would be enough.
so, can anyone recommend a suitable module? something less than $50?
___
OpenMoko community
sparkfun has a few, this one jumped out at me, but check out the rest
http://www.sparkfun.com/commerce/product_info.php?products_id=7892
On Jan 22, 2008 8:02 PM, Robin Paulson [EMAIL PROTECTED] wrote:
i've got a project in mind for when my neo freerunner arrives, that
needs a digital compass.
26 matches
Mail list logo
