Showing posts with label headphone. Show all posts
Showing posts with label headphone. Show all posts

Friday, December 12, 2014

Wireless IR headphone receiver schematic

wireless-receiver
This is example circuit of Wireless IR headphone receiver.A photodiode Dl feeds high gain IR remote control preamp 1C, a CA3237E. U2 is a PLL FM detector tuned to around 100 kHz. 
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Sunday, August 24, 2014

Amplifier for Paralelling Headphone

Amplifier
The circuit is useful to strengthen the voice on the headphones, which is where the headphones have a stereo output is used and paralleled to some headphones. The circuit is based on the TDA2822 amplifier circuit modified to ampifier headphones.
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