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receive diode, amplification, bandpass filter, demodulation, shaping and other circuits to do together, when received this code, the microcontroller will encode the analysis and processing, so as to achieve the control of household appliances.The second method adopted by the ordinary MP3 audio 0, 1 encoding, and then amplified by the transistor and loaded into a 555-based circuit issued by the 38K carrier, by amplitude modulation to achieve remote control.Material: 940nm infrared emitting tube,
Technical operational issues Most friends now use headphones with microphones, this kind of earphone generally has 2 inserts the mouth, one receives the audio interface, another receives the microphone interface, if realizes the microphone interface to be possible, must speak the microphone the plug to connect the computer corresponding audio port to realize the microphone function, this is the question which many friends easily ignores. If the micr
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