How iPhone 3G S Compass Works

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I was curious about how the iPhone 3G S's compass feature work. After looking at Apple's patents and hardware discussion, I found the answer. The solution is actually quite simple. For a copy, email me.

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  • http://pdf1.alldatasheet.com/datasheet-pdf/view/219477/AKM/AK8973.html
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  • PLEASE DONT POST LIES ABOUT AK8973. IT IS DANGEROUS DEVICE.

    TINFOIL HATS HAVE BEEN PURCHASED.

    TAPES HAVE BEEN ERASED.
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  • A funny Joke. Just download the AK8973 Datasheet (http://www.akemd-eu.com/images/productguide_magnetic.zip) It's a low-cost 3-axis magnetometer. The magnet is all around us, even if you keep pressing the button. (If that scares you, tin-foil hats available at: http://www.lessemf.com)
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How iPhone 3G S Compass Works

  1. 1. How the Apple iPhone 3G S Magnetometer Works.<br />By Dr. ArsenyLebedev B.S. Ph.D<br />
  2. 2. Compasses are attracted to the Earth’s poles using Magnets<br />Source: Everyone knows that.<br />
  3. 3. The iPhone 3G S does not use magnets.<br />
  4. 4. Magnetic interference would render the iPhone’s cellular capabilities useless.<br />Sources: <br /><ul><li>http://link.aip.org/link/abstract/VIRT01/v19/i22/p112/s1
  5. 5. http://weeksmd.com/?p=1521
  6. 6. http://blogs.crikey.com.au/planetalking/2009/03/06/electromagnetic-interference-back-in-frame-as-possible-cause-of-qantas-a330-incidents/
  7. 7. http://machinegunkeyboard.com/?p=254
  8. 8. http://www.macnn.com/blogs/2009/06/11/apples-iphone-emergency-mode-processor-features-patent.html</li></li></ul><li>Spectrograph Analysis<br />Once introduced, magnetic interference drops signal strength parabolically. Frequency and power ranges are consistent with GSM bands.<br />
  9. 9. Electronic Solution <br />Apple must be utilizing simple RF to determine North.<br />
  10. 10. Hardware Details<br />The AK8973 chip on the iPhone is a small sensor that “listens” for an ultra low frequency signal. <br />If that signal comes from a specific spot like North, paired with the accelerometer the device can calculate its orientation and direction.<br />Sources:<br /><ul><li>http://www.appleinsider.com/articles/09/06/24/cost_to_build_apples_new_iphone_3g_s_estimated_at_179.html
  11. 11. John W. Jewett, Raymond A. Serway,Physics for Scientists and Engineers with Modern Physics, pp 532-545, Brooks/Cole, 2007</li></ul> <br />
  12. 12. Possible Flaw: How does Apple transmit an RF signal around the world? <br />
  13. 13. Obvious Answer<br />Apple has built a Dharma station on the North Pole to transmit a signal!<br />
  14. 14. Contact<br />arseny@magnetismstudios.com<br />Twitter: @arseny<br />Oh, and check out FileMagnet, which really does use magnets:<br />

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