SunRobotics Light Photo Interrupter Sensor Module Speed Detection Electronic Components Electronic Hobby Kit

Light Photo Interrupter Module for Arduino will trigger a signal when light between the sensor's gap is blocked. Photo Interrupter module consists of an optical emitter/detector in the front and two resistors (1 k? and 33 ?) in the back. The sensor uses a beam of light between de emitter and detector to check if the path between both is being blocked by an opaque object.