/diy/ - Do It Yourself

Ok /diy/, I asked /g/ for advice and it turns out they're a bunch of posers who don't understand consumer electronics, so I'm coming to you for advice on picrel project I am ready to start soldering.

Basically, I need 5v DC, one analog video channel, and one audio channel. Please correct me if I'm wrong, but this means I need 4 wires because they can share ground? In that case, I have decided to use 3.5mm TRRS (because it is analog AV and meets size constraints), which I would like to be compatible with existing products also using this connector. The problem is that every major company seems to have implemented their own version. Worse, constant voltage destroys speakers, so I need to be very careful which pin is +5v.

>I would like to be able to plug in normal headphones (with mic or otherwise) to listen to the single channel of audio without destroying them, or at the very least without creating a short circuit.
>I would also like to be able to plug in my NTC CHIP which has its own TRRS that is laid out LRGV.
>I would also like to plug in a Samsung TV, which uses the layout VRLG.
>All else being equal, it feels right to me to have the sleeve be ground and tip be +5v.

Based on these goals, what do you think is the best layout? Also, will 5v destroy a headphone mic? Will an analog video signal do the same to a headphone speaker?

My project aside, which TRRS standard should rule them all?