I have to give audio Line Out in my project. I don't know which connector I have to give this out. I have found that in PC, 3.5mm Jack is used for line in and line out. Also found that RCA jacks have been used for line out in other equipment. I want to know what is the standard connector for LINe out interface. Also please suggest whether 3.5mm headphone jacks can be used for Line Out?
Afaik, there is no 'default'.
There are many more types:
- 5 pin DIN (very old, obsoleted by RCA); mono or stereo per connector
- RCA (2 different plugs for stereo), mostly obsoleted by 3.5 or 6.3mm jack plugs; mono per connector
- Jack plugs (3.5mm used in most consumer devices), 6.3mm for more high-end devices (in general), mono or stereo per connector
- XLR plugs (mostly 2 plugs for stereo), used by 'professional' sound equipment; mostly mono per connector. Also these plugs have the advantage to 'lock' themselves.
All of the above can be used for input or output audio.