I have purchased a 3.5mm port online. I want to wire them to a mono output to a amplifier board. I have worked the ground and right and left channel terminals on the port. I am not sure how you would wire this as a mono output. Would you solder both the left and right terminals together or just use one terminal either the left or the right? If not would I need some sort of adapter? Thanks Very Much!
The problem comes from what "type" of mono input you want. There are two
- TS, also called Tip-sleeve, is an unbalanced, single-ended signal. If your amp uses this input then you can just plug it in, and hear everything out of the Left channel.
- TRS, also called, Tip-Ring-Sleeve, is an often balanced (not required), differential signal. For this you would need a converter. Details about how to create one should be asked in a different question.
Do note: if you want mono, you'll only get the left channel's audio. This can be quite odd sometimes. There are ways of putting two channels into one channel. This is also the subject of another question that you can ask if that's what you want.
You can generally use a stereo cable going into a mono jack. If you take a look at This Picture for a product from Digikey you can see the mono audio signal contact will make contact with the second ring on a stereo jack. So it will only use the right channel.
I don't know if that's universal, but almost every one I've seen tends to do that.