The reflectivity of infrared light varies with the colour and distance of the reflecting surface. According to this principle, Grove - Infrared Reflective Sensor utilizes a RPR220 reflective photosensor module to detect colour and distance. When a light-coloured object approaches, the signal intensi..
Grove - Infrared Reflective Sensor v1.2 can be used for detection of proximity and colour of objects. The reflective photosensor - RPR-220 used in this module consists of an infrared light emitting diode and a high sensitivity phototransistor. Light-coloured objects directly in front of the sensor w..