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Why accelerometers don’t really measure acceleration


The smartphone app SMTH (“Send Me To Heaven”) uses a smart phone’s accelerometer to measure the height the phone reaches after you toss it in the air. (The marketing tagline for the app is, “Probably the last game I´ll ever play on my current phone.”) Roger Meike, one of the creators of SunSPOT, a very early Internet of Things device, put together a nice tutorial on just what an accelerometer really measures and the calculations the app performs.


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