Hello everyone,
Does anyone knows which technology uses the Desires Z compass.
Is it a hall effect sensor (without raw magnetic pieces)?
I got a case with a magnetic closure and I m affraid with time that it might
demagnetize the sensor.
Thank you for your replies.
Related
when the nexus s is flat /horizontal the compared seems fairly accurate. However if I point the device say due east and slowly tilt the device 90° in the vertical direction, still pointing east, the reading is off by about 15°.
This is very noticeable when I use the compass app or google sky maps. anyone else noticed this?
Sent from my Nexus S using XDA App
I have noticed the compass is terrible and noisy in general. There's supposed to be a new sensor fusion API, but as far as I can tell that is currently broken and reports NaNs...
There are many factors that could contribute to your compass being wrong, the first being that compasses are wrong! The first, Magnetic Declination is the offset between magnetic north and true north. Mine is about -8 degrees.
wikipedia.org/wiki/Magnetic_declination
The second, and probably more important factor is the Magnetic Inclination: the actual angle of the magnetic field relative to the ground. Here in Ohio, the field is mostly 60% or so vertical!
wikipedia.org/wiki/Magnetic_inclination
If the coders do not correct for the actual rotation of the sensor, then what you see is the large Z axis (coming out of the screen) become the new Y measurement, while X stays the same. Since the first trivial calculation of heading is: atan2(y,x) you can see what happens when y becomes much larger, but x stays the same.
So it all depends on if they are using the accelerometers/gyros to correct for orientation and then calculate heading or at the very least relabel axes at some point.
You can read more about what Android actually provides developers here
developer.android.com/reference/android/hardware/SensorEvent.html
But without access to the source code, I can't know what's actually causing your problem.
I have the same issue
please report this bug at here:
http://www.google.com/support/forum/p/Google+Mobile/thread?tid=37f2dd3261d20d1f&hl=en
and add a star if you have this issue as well here:
http://code.google.com/p/android/issues/detail?id=15999
check my issue video here:
http://www.youtube.com/watch?v=l-9lehX8u2U
Google please fix this!!!
Hello,
My school have purchased a Xperia Arc beleiving that it comes with a Gyroscope sensor but after checking the specs at the sony website it doesn´t mention anything about it...
Can anyone tell me if it has gyro sensor?
It is crucial for us as we are doing our thesis about the use of the gyro for indoor positioning within android. So we need an android device which has one.
The phone hasn¡t arrived but in case it doesnt have gyro we need to cancell the order and look for an alternative.
Anyone???
Thanks
it has ;
Accelerometer
Compass
Magnetic Field sensor
which means yes... it does have gyroscope - just not called a gyroscope..!!
From the Apple iPhone4 Gyroscope demo, I think compass and accelerometer is suffice to build a gyroscope.
CMIIW
Hi All
I have finished working on a compass app and I have used orientation sensor.
my question is, is it better to use magnetic sensor or orientation sensor?
What's the difference between the two? Any help or comment will be highly appreciated. Regards. Shiraz
Sent from my Desire HD using XDA App
Well, the orientation sensor will need to be calibrated to give any meaningful information on what direction it is pointing, but I think it would be more accurate, based on my experience, than the magnetic sensor. Keep in mind that "magnetic north" varies wildly depending on your place on the globe and varies locally depending on ferrous materials in the vicinity of the device.
Thanks Gene
Sent from my Desire HD using XDA App
Hey All,
I am doing some research at Uni and I need to know some technical specifications for the TF300T and was looking for some assistance.
I need to know the following information:
Dimensions of rear facing Camera CCD array
Position of Gyroscope wrt Camera (rear)
Position of Accelerometer wrt Camera (rear)
Position of Magnetic Sensor wrt Camera (rear)
Position of GPS sensor wrt Camera (rear)
I have already contact the ASUS hotline in Australia but they did not have this information and suggested i submit a technical request form on the ASUS website. Which in the reply directed me to the basic tech specs online here http://www.asus.com.au/Tablet/Transformer_Pad/ASUS_Transformer_Pad_TF300T/#specifications and told me to call the local hotline again if i have anymore questions.
So does anyone have any of the aforementioned information or know who i should contact to find out some of this information?
Cheers
James
My bad
Opps wrong section could a moderator move this topic for me?
Thanks
Hello, I was wondering if anyone knew what the sensors on the fron of the galaxy s4 are. It obviously has a camera, and one is a proximity sensor. I think one is a light sensor, but whats the 4th?
Anyone know? Is it something for motion tracking? (and if so is there an api for it?)
(On an unrelated note, is there any api for the hover above the touchscreen?)
Thanks. I'm just curious. It seems like these phones have more sensors that there are things to sense lol. (seriously does a phone need a pressure sensor and barometer? )
firesoul453 said:
Hello, I was wondering if anyone knew what the sensors on the fron of the galaxy s4 are. It obviously has a camera, and one is a proximity sensor. I think one is a light sensor, but whats the 4th?
Anyone know? Is it something for motion tracking? (and if so is there an api for it?)
(On an unrelated note, is there any api for the hover above the touchscreen?)
Thanks. I'm just curious. It seems like these phones have more sensors that there are things to sense lol. (seriously does a phone need a pressure sensor and barometer? )
Click to expand...
Click to collapse
Sensor for air gestures.
Here. Pretty cool picture with lots of info about the sensors on the GS4. As always, GOOGLE SEARCH FIRST!!
Joe0113 said:
Sensor for air gestures.
Click to expand...
Click to collapse
Oh so it does have a dedicated one. People on the internets seemed to think the gestures were combinations of the camera and proximity sensor.
But is there anymore info about it? I would love to know more details. And any api?
firesoul453 said:
Oh so it does have a dedicated one. People on the internets seemed to think the gestures were combinations of the camera and proximity sensor.
But is there anymore info about it? I would love to know more details. And any api?
Click to expand...
Click to collapse
I edited/updated my post... check it out!