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YouTubevt.physics
Revealing the Science: How Hall Effect Sensors Make Your Laptop Sleep
What appears to be a curious trick - placing an AirPods case near a Chromebook and watching the screen turn off - is in fact a straightforward application of the Hall effect. Modern laptops employ Hall effect sensors near the hinge to detect whether the lid is open or closed. A constant current flows through the sensor, and when a nearby magnet ...
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