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Default Iphone compass app

I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?
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Default Iphone compass app

On 14/05/2019 13:38, Harry Bloomfield wrote:
I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?


Wots an SE?

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Default Iphone compass app

On Tuesday, May 14, 2019 at 1:57:42 PM UTC+1, TimW wrote:
On 14/05/2019 13:38, Harry Bloomfield wrote:
I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?


Wots an SE?


Wild guess, it's an iPhone model.

Tim+
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Default Iphone compass app

On 14/05/2019 14:20, Tim+ wrote:
On Tuesday, May 14, 2019 at 1:57:42 PM UTC+1, TimW wrote:
On 14/05/2019 13:38, Harry Bloomfield wrote:
I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?


Wots an SE?


Wild guess, it's an iPhone model.

Tim+

I thought maybe he was snuggling up to a Structural Engineer.

TW
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Default Iphone compass app

Tim+ laid this down on his screen :
Wild guess, it's an iPhone model.


Iphone SE (Special Edition)..


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Default Iphone compass app

On 14/05/2019 13:38, Harry Bloomfield wrote:
I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?


It's magic [tm]

It's probably doing an AI job on you, and possibly cancelling out your
deliberate field interference when compared with other sources (GPS,
skyhook) of information - which probably has a few vectors valid within
a time window.

Should be able to fool it though. Keep trying, say - turn off the
wireless comms? or sweeping your magnet across slowly.

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Default Iphone compass app

I don't know but I do find often that moving in the garden seems to effect
its detection of north, so I'm guessing its actually quite slow at detecting
things.
Brian

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"Harry Bloomfield" wrote in message
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I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet close
to my SE doesn't seem to affect it at all. What am I missing?



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Default Iphone compass app

Its an older but much loved Iphone model as it actually has a real earphone
socket on it.
Brian

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"TimW" wrote in message
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On 14/05/2019 13:38, Harry Bloomfield wrote:
I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?


Wots an SE?



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Default Iphone compass app

It happens that Brian Gaff formulated :
I don't know but I do find often that moving in the garden seems to effect
its detection of north, so I'm guessing its actually quite slow at detecting
things.
Brian


That makes some sense. I guess it is using a mix of magnetic and gyro/
motion sensor, to work out a bearing, which is causing a lag in
response to a magnet. The thing is, it keeps showing upto 90 deg out on
a bearing on the compass. I do have a magnet close to where I charge
it, one I was using to check its response to a magnet.

So long term it uses magnetic field, short term it uses its gyro.


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Default Iphone compass app

On 14/05/2019 13:38, Harry Bloomfield wrote:
. What am I missing?


The inputs from the accelerometers.

If the phone isn't moving there's no point updating the compass.
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Default Iphone compass app

On 14/05/2019 17:39, Harry Bloomfield wrote:
It happens that Brian Gaff formulated :
I don't know but I do find often that moving in the garden seems to
effect its detection of north, so I'm guessing its actually quite slow
at detecting things.
Brian


That makes some sense. I guess it is using a mix of magnetic and gyro/
motion sensor, to work out a bearing, which is causing a lag in response
to a magnet. The thing is, it keeps showing upto 90 deg out on a bearing
on the compass. I do have a magnet close to where I charge it, one I was
using to check its response to a magnet.

So long term it uses magnetic field, short term it uses its gyro.


Can't you get the phone to display an analogue clock face, then use the
"boy scout" way relative to the Sun?

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Default Iphone compass app

On Tuesday, 14 May 2019 13:39:03 UTC+1, Harry Bloomfield wrote:
I have read that the Iphone uses a magnetic compass, which suggests it
would be affected by very local magnetic fields, but putting a magnet
close to my SE doesn't seem to affect it at all. What am I missing?


It probably works on GPS principles.
It won't know which way North is until you move it around.
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