this post was submitted on 20 Nov 2023
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Would it be possible to upgrade my cars 2pin AUX to 4pin and connect steering wheel buttons to the extra 2 pins with resistors to operate the fwd/rev/play options? (alien.top)
submitted 11 months ago by MrTrendizzle@alien.top to c/diy@hi-fi.community
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[–] Dreamintob@alien.top 1 points 11 months ago

i think it's doable, but make sure your phone and steering wheel controls are compatible with the 4-pin setup. you might need something to interpret the button presses for the TRRS jack. wiring mic/gnd through the button in/out with the right resistors should work for the phone controls. your paint explanation looks solid, good luck!