I've made a number of updates to post number 3 recently, including info on hooking up the 360 camera and an adapter for using the factory GPS antenna.
I'm going to be wiring in a couple of USB charger ports to a
replacement panel that Gamiviti makes for the center speaker grill. For the power source, something I've been wondering about is that EC Offroad mentions that the secondary main harness plug that comes with these head units (and isn't used in our LC's) can be used as a power source for accessory circuits (about 6 minutes into the part 2 video that's included in the first post of this thread). Does anybody happen to know how much power would be safe to draw off of that?
I'll be installing a pair of these:
Amazon product ASIN B08DFR571Z
The specs say the output is 5V 2.1A * 2 for one of these charging sockets.
Using the Volts * Amps = Watts calculation:
5V * 2.1A * 2 = 21 watts (this agrees with the posted specs)
21 watts / 12V = 1.75A (@ 12V)
Allowing for some wasted energy in converting 12V to 5V and the power draw from the power indicator light (the seller says that those draw 0.06W), I would think a pair of these would be drawing less than 4A @ 12V total if all 4 charging ports are in use.
I know how to run circuits through the firewall to the battery, but am hoping to avoid doing that yet again and it would also be nice to have these switched off when the ignition switch isn't in accessory mode or on (I know this can be accomplished that by hooking a relay up to an appropriate circuit so that there's minimal drain on an existing circuit).