Iphone compass app

Wots an SE?

Wild guess, it's an iPhone model.

Tim+

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

TW

Tim+ laid this down on his screen :

Iphone SE (Special Edition)..

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.

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

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

Or a sex emulator? Brian

It happens that Brian Gaff formulated :

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.

There's some overlap in the motion/position sensors and they partly compensate for one other. You can get apps to show the output of each sensor on a real time graph.

The inputs from the accelerometers.

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

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

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

If I reverse into a parking space, my SatNav thinks I've turned round!