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Wireless Ir Headphone Receiver Circuit

2016-02-09 04:06  
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IR detector diode D1 intercepts the IR signal at around 40 kHz and feeds it from Ul, a high-gain preamp, to PLL, U2, a 4046 configured to serve as an FM detector.
Wireless Ir Headphone Receiver Circuit

U3 is an audio amplifier that feeds a pair of headphones or a speaker.

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