A remote control is a device used to remotely control machinery

Modern remote controls are mainly composed of integrated circuit boards and used to generate different messages (the definition of message in communication science: it consists of a group of interrelated meaningful symbols that can express a complete meaning of information.) of buttons. The passenger car door remote control adopts new technology to encode and decode, and control the door pump solenoid valve in a flash mode to achieve the purpose of opening and closing the automatic door. It is used for remote control to open and close the doors of passenger cars (buses, minibuses), so as to avoid the trouble that the driver needs to get in the car to open the door every time. The main components of the transmitter part of the remote control are infrared light-emitting diodes. It is actually a special light-emitting diode. Because its internal material is different from ordinary light-emitting diodes, when a certain voltage is applied to its two ends, it emits infrared light instead of visible light.