Wireless IR Headphone Receiver

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IR detector diode D1 intercepts the IR signal at around 40 kHz and feeds it from U1, a high-gain preamp, to PLL, U2, a 4046 configured to serve as an FM detector. U3 is an audio amplifier that feeds a pair of headphones or a speaker.

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Wireless IR Headphone Receiver - Circuitos de Electronica

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