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| + | [* black] Before we get into the nitty gritty of things, let's define a gyroscope. |
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| + | [* black] According to [link|http://en.wikipedia.org/wiki/Gyroscope|Wikipedia's definition], "A gyroscope is a device for measuring or maintaining orientation, based on the principles of conservation of angular momentum." |
| + | [* black] A mechanical gyroscope - like the one shown on the left - uses a spinning rotor in the center of the gyroscope to detect changes in orientation. |
| + | [* black] The iPhone 4 utilizes an electronic version of the gyroscope, called a [link|http://en.wikipedia.org/wiki/Microelectromechanical_systems|MEMS] gyroscope. |
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