If your iPhone's sensors aren't working correctly, you may need to calibrate them. Here's how to calibrate an iPhone's brightness and motion sensors.

Motion detection is the magic ingredient in the current wave of do-it-yourself home security cameras. Thanks to built-in sensors that vigilantly monitor their field of view for movement, you can go ...

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Some motion sensors are based on optical measurement technologies to provide accurate velocity and position measurements without requiring physical contact with the object or surface being monitored.