Laser distance sensors

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The working principle of laser distance sensors is to emit a beam of light and measure the delay of the returning light due to reflection from an obstacle. On this basis, the distance to the obstacle can be precisely determined and compared with the set detection range. If something appears at a distance smaller than the set value, the light will turn on. This solution is perfect for turning on lighting circuits, for example on open stairs, where it is important that the sensor detects presence only on the stairs and ignores everything that happens outside.