What is a light-sensing speed module

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At their core, optical speed sensors are devices that use light to detect movement. They usually consist of a light source (like an LED or laser) and a photodetector that catches light reflected or interrupted by a moving object. In practice it is built in two ways: a discrete analog chain or an all-in-one sensor IC. And when they team up with IoT (Internet of Things) systems, they do more than just measure — they help automate, optimize, and predict. A device that, strictly speaking, senses the measurement and converts it into an output signal of the same or a different character.

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