It's not that simple, what voltage and current need to held on that wire to light the LED and the camera? It's not uncommmon to find a situation where a chip doesn't technically have the right power on it's power rails, but is instead drawing power on the input ports. It's non-trivial to prove this is or isn't happening.
No, I think it is that simple. The camera module likely needs either 3.3v or 5v. The LED can also be powered at either 3.3 or 5v by simply using a series resistor. You just hook the camera and LED to the supply in parallel.
> a chip doesn't technically have the right power on it's power rails, but is instead drawing power on the input ports.
What does this mean? The data lines of camera modules are generally differential pair, and it is highly unlikely that significant power is being drawn from them.
All I'm saying is that I have literally worked with systems that have drawn power over differential pairs and it's fucked with our power measurements. So don't rule it out.
