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Working principle of TV remote control
2022/1/25
The frequency of the remote controller used in use is 38kHz. Different keys are encoded in a certain way. The modulation wave is generated through a special integrated circuit and transmitted through an infrared diode. After the TV is received, it decodes and then performs the corresponding action. Infrared pulse signals with different frequencies correspond to different commands, and this kind of pulse is realized by quartz. After power on, the vibration frequency of quartz is very fast and uniform, so it can be used to realize different pulse frequencies.
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