Details in the documentation.
The sensor sends a beam of radiation through the IR transmitter. then measures the light intensity reflected through fototranzystora. The output is a voltage signal dependent on the light intensity falling on the detector. The more light will be reflected and fall into fotodetektora that the output voltage will have a higher cost. How that light reflects the surface of the light (dark absorbs), so the voltage will be higher, isolated on a white material.
The sensors are readily used by designers of robots, Line Follower to detect lines, as well as in the construction minisumo, which serve to define the edges of the ring. As, in these cases are the extreme values (to distinguish black from white, intermediate values are not important), the sensor can be located higher above the surface than points in the documentation. From our experience it follows that with appropriate selection of resistors, sensors incorrectly distinguish the black tape from the white background from a distance of about 0.5 cm.
The advantage of the sensor are small size and light weight. He lacks, however, the protective casing (so I can find the CNY70 sensor), which is as close to the surface not working properly. Therefore, you should take care of the appropriate setting of this parameter.
The sensor consists of two main parts: a detector in the form of fototranzystora, and transmitter, where the infrared led. The transmitter is not damaged, you should limit its current (max. 50 mA), and, consequently, the infrared power. This is done through the resistor connected in series (R3). For proper operation fototranzystora necessary podciągający resistor (marked on the figure as R4). Values must be selected using the documentation (example on the picture below).
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The table presents available forms of delivery in Poland
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