How does a smartphone compass work?
Smartphones have a tiny sensor called a magnetometer that measures Earth's magnetic field to work as a digital compass.
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Sensor Facts
Sensor facts and facts about sensors, from the Random Facts shelf.
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What sensors are in a smartphone?
Smartphones contain many sensors, including GPS, accelerometers, gyroscopes, and magnetometers.
Who invented the theremin?
The theremin was invented in 1920 by Russian physicist Léon Theremin while he was researching sensors that detect motion.
Can octopuses taste with their arms?
Octopus suckers have chemical sensors that let them taste what they touch.