With the continuous improvement of people's living standards, there are more and more places that need to use wireless devices, such as wireless remote controllers, but some people will mix infrared remote controllers with him. Let us give you a detailed introduction the difference about the wireless remote control and infrared remote control. A <a href="http://www.carymart.com/">radio frequency remote control</a> is a electric device that uses radio signals to control various remote institutions. Infrared remote controllers are remote control devices that use wavelengths to transmit control signals. The commonly used infrared remote control system is generally divided into transmitting and receiving two parts. The main component of the emitting part is an infrared light emitting diode. It is actually a special light-emitting diode. Since its internal material is different from ordinary light-emitting diodes, it emits infrared light instead of visible light when a certain voltage is applied to both ends. The main part of the receiving part is an infrared receiving diode. In practical applications, it is necessary to add reverse bias to the infrared receiver diode so that it can work normally. That is, the infrared receiver diode is used in the reverse direction in the application of the circuit, so that a higher sensitivity can be obtained. Since the emission power of infrared light-emitting diodes is generally small, the signals received by the infrared reception diodes are relatively weak, so it is necessary to increase the high-gain amplification circuit. In recent years, most of the infrared reception heads have been used. The finished <a href="https://en.wikipedia.org/wiki/Infrared">infrared</a> receiving head package has three pins, namely, the positive pole of the power supply, the negative pole of the power supply, and the data output. The pin arrangement of the infrared receiver head varies from model to model, refer to the instructions for use. The advantage of the finished infrared receiving head is that it does not require complicated debugging and shell shielding, and it is very convenient to use as a triode. But pay attention to the carrier frequency of the finished infrared receiver when using it. Infrared remote control commonly used carrier frequency is 38kHz, which is determined by the 455kHz crystal used by the transmitter. There are also some remote control systems using 36kHz, 40kHz, 56kHz, etc., which are generally determined by the oscillation frequency of the crystal at the transmitting end. The characteristics of infrared remote control do not affect the surrounding environment and do not interfere with other electrical equipment. Because it cannot penetrate the wall, home appliances in different rooms can use a <a href="http://www.carymart.com/rf-remotes-transmitters-remote-cloners-duplicators-c-281_422.html">rf universal remote</a> control without mutual interference, and multiple remote control can be performed. Therefore, infrared remote control is now widely used in home appliances and indoor close-range (less than 10 meters) remote control.