The board comes from a broken pair of wireless headphones, but the board itself still functions properly. But it means I don't have a schematic diagram for it. My idea is to install a 3.5mm female plug/jack so I could use it with any non-usb headset. I know I could just buy a new wireless headset, but I like to re-use what I can from broken electronics.You have to show us the schematic diagram of your board. It would also be helpful to know what you are connecting it to.
We can't answer your question without seeing what you have. A circuit might be necessary or it might not, we just can't tell from the inadequate verbal description. Maybe you could create a schematic by looking at the board and tracing out the runs.Isn't there a circuit I could make that could convert the outputs into R, L, and GND? or would I need a small computer (Raspberry Pi?) to convert the signals into what I want?
Oops. I meant the simplest solution for the situation where L- and R- can not be tied together. Sorry for the confusion.A pair of transformers I think... but that's still more work than just soldering the two negatives together. If the OP has a multimeter and a few seconds to use it, transformers may turn out to be unnecessary.
What I think is odd is how they where separate on the board, even when the are connected. But oh well.Ha! That's awesome and not surprising. So you don't even have to join them, cause it's already done. That's great. Just hook your trs sleeve to the shared negative, ring to right, and tip to left.
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