The modern smartphone is only possible because of sensors. Their svelte form factor conceals accelerometers, magnetometers, temperature sensors, a GPS unit, and gyroscopes. They all consume volume and ...
The rotating-mass gyroscope, which lies at the heart of inertial measurement units (IMUs), has served very successfully from the 1930s to the 1970s, guiding astronauts, spacecraft, missiles, and more.
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