Charging/USB over 4 pin 3.5mm Audio Jack

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Charging/USB over 4 pin 3.5mm Audio Jack

Post by MegaLoop » Mon May 14, 2018 7:00 am

I have an MP3 player that uses a 4 pin stereo headphone jack for both audio output and USB charging/data. Uses a cable that looks like this:
USB to Stereo Headphone.jpg
USB to Stereo Headphone.jpg (7.43 KiB) Viewed 2766 times
Anyone ever used this in a project before? Seems like it would be handy for small handhelds.

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