How iPhone 3G S Compass Works

How iPhone 3G S Compass Works

http://static.slidesharecdn.com/swf/ssplayer2.swf?doc=iphone3gs-090625115937-phpapp01&stripped_title=how-iphone-3g-s-compass-works-1639451

Apple Iphone 3G S uses a magnetometer developed by Asahi Kasei. AK8973 is a small chip sensor that listen for ultra low frequency from a specific spots, like North.

For more information about how Compass works you can read this datasheet information http://bit.ly/AK8973

By time to time you need to re-calibrate compass, here is how http://bit.ly/calibratecompass

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