The transmitting circuit of infrared remote control uses infrared light emitting diode to emit modulated infrared light wave; The infrared receiving circuit is composed of an infrared receiving diode, a triode or a silicon photocell, which converts the infrared light emitted by the infrared emitter into a corresponding electrical signal and then sends it to the post amplifier
The transmitter is generally composed of command key (or operating lever), command coding system, modulation circuit, drive circuit, transmission circuit, etc. When the command key is pressed or the operating lever is pushed, the command coding circuit generates the required command coding signal. The command coding signal modulates the carrier wave, and then the power is amplified by the driving circuit, and the modulated command coding signal is transmitted from the transmitting circuit.
The receiving circuit is generally composed of receiving circuit, amplifying circuit, modulating circuit, instruction decoding circuit, driving circuit and executing circuit (mechanism). The receiving circuit receives the modulated coded command signal sent by the transmitter, amplifies it and sends it to the demodulation circuit. The demodulation circuit demodulates the modulated coded command signal, that is, restores it to the coded signal. The instruction decoder decodes the coded instruction signal, and finally the drive circuit drives the execution circuit to realize the operation control (mechanism) of various instructions