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How to program a light sensor in robotc12/29/2022 ![]() Output signal is analog, has a current consumption of 2 mA and an error of 5%. The light sensor from Phidgets can measure the visible light spectrum of the human eye between 1 to 1000 lux. ![]() It can be used to improve the robot vision and is perfect for light detection, light intensity and to distinguish between a light or dark environment. The LEGO light sensor is designed to fit perfectly into a LEGO robot. This sensor can be used to detect a flashlight or for orientation in a room. Light detection is done using cadmium sulfosolenide (CdS) photoconductive photocell that changes its resistance value when it detects a certain amount of light. The light sensor from VEX is one of the simplest light sensors which can be used in robotics to allow a robot to detect the light. Photo-junction devices – these photo devices work the same as a photodiode or phototransistor – use the light to control the flow of electrons and holes across their PN-junction.īelow you can find a review of various light sensors that can be integrated easily and as needed in any type of robot.This material has the ability to generate EMF when is subjected to light radiation Photo-voltaic cells – these cells generally use Selenium to measure light intensity.In general these photo cells use Cadmium Sulphide semiconductors Photo-conductive cells – these cells changes their electrical resistance value when are subjected to a beam of light.Photo-emissive cells – these types of sensors release free electrons which belong to a light-sensitive material when they receive enough energy from a photon. ![]() ![]() The operation mode of a light sensor is simple, it generates an output signal directly proportional with light intensity measured.Įven if the operation mode is simple, there are four main principles on which such sensors are based: ![]() Used with one purpose – to detect the light – they are very easy to install and are also inexpensive. Light sensors are very common in robotics especially for navigation and object detection by measuring the amount of reflected light. ![]()
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