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WIRELESS_IR_HEADPHONE_RECEIVER

2016-11-17 19:25  
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WIRELESS_IR_HEADPHONE_RECEIVER
A photodiode D1 feeds high gain IR remote control preamp IC, a CA3237E. U2 is a PLL FM de-tector tuned to around 100 kHz. The detector output is amplified by U3 and it can drive a speaker or a set of headphones.