operating principle
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The code that the corresponding electrical appliance can parse is stored in the internal chip of the remote control, so that the electrical appliance can communicate with each other in use, and the electrical appliance performs the corresponding function after receiving the signal from the remote control, that is, the remote control is realized.
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Infrared remote control system General infrared remote control system by transmitting and receiving two parts, the application of encoding\/decoding ASIC chip to control the operation, the transmitting part includes keyboard matrix, code modulation, LED infrared transmitter; The receiving part includes optical and electrical conversion amplifier, demodulation and decoding circuit.
The oscillator inside the microprocessor chip IC1 is composed of a high-frequency oscillator through 2 and 3 pins and an external oscillator crystal X to generate a high-frequency oscillator signal (480kHz).
The principle is: the remote control converts the signal you want to send into an electric current, changes the current into an infrared light through an infrared transmitter, and then sends it out.
The working principle of remote control:
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The code that the corresponding electrical appliance can parse is stored in the internal chip of the remote control, so that the electrical appliance can communicate with each other in use, and the electrical appliance performs the corresponding function after receiving the signal from the remote control, that is, the remote control is realized