Monday 18 July 2016

android - What protocol does a headphone jack use?



I have 2 questions. One is simple, the other may be not.


1. What's the official name for the standard headphone jack? It's universal for all brands of phones, so it must have a name (when you want to go shopping for components).


2. Is it using some sort of a communication protocol? I know for a fact that it's not only for headphones. There is a device for scanning credit cards that plugs into the same jack. I believe Nexus also has a TV-out support from the same jack. Basically, can it be used for other I/O applications?


Thank you




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