Traditional TV infrared reception

Some set-top boxes can use wired receivers to achieve remote reception. Since you can congratulate the video and sound on the set-top box, get a wired infrared receiver on the hole of the video line and plug it in the set-top box. In addition, the infrared receiver has three pins, so it should have three wires. In addition, infrared rays travel in a straight line, so they can be remotely controlled by objects, and infrared rays are easily interfered by sunlight of fluorescent lamps, and the receiving distance is limited, so it is not very good to use reflection.