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Part of the LCD TV remote control
LCD TV remote control remote control signal is formed mainly by the microprocessor chips, crystal oscillator, amplifying transistor, an infrared light emitting diode and a keyboard matrix composition. It works as follows IC1 microprocessor chip internal oscillator by 2,3 feet composed with an external crystal oscillator X a high frequency oscillator which generates a high-frequency oscillation signal (480kHz). This signal is generated sinusoidal signal
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