Infrared TV Learning Remote Control 45 Keys For TIGO Set Top Box

TV learning remote control 45 keys for TIGO set top box

Infrared remote control system is generally composed of transmitter and receiver. The transmitter is composed of command key, command signal generation circuit, modulation circuit, drive circuit and infrared transmitter. When the command key is pressed, the command signal generation circuit generates the required control signal. After the control command signal is modulated by the modulation circuit, the drive circuit finally drives the infrared emitter to send the infrared remote control command signal.

The receiver is composed of an infrared receiving device, a preamplifier circuit, a demodulation circuit, a command signal detection circuit, a memory and drive circuit, and an execution circuit. When the infrared receiver device receives the infrared command signal from the transmitter, it converts the infrared light signal into an electric signal and sends it to the preamplifier circuit for amplification. After passing through the demodulator, the command signal is detected by the signal detection circuit. Finally, the memory circuit and the drive circuit drive the execution circuit to realize various operations.

Control signals are generally distinguished by some different characteristics. The commonly used characteristics for distinguishing command signals are frequency and code group characteristics, that is, different frequencies or coded electrical signals represent different command signals to realize remote control. Therefore, infrared remote control systems are usually classified according to the ways and characteristics of generating and distinguishing control command signals, and are often divided into frequency division infrared remote control and code division infrared remote control