Proper Pi 3B Connection to PR38-29

Hi All,

Just fried my Pi 3B and probably an NCD Current Monitor board. All my fault.

As I looked at this setup, I started questioning the power supplies to the Pi and also the NCD board.

Attached is a picture of the setup. Of course, each board has it’s own power supply (not shown); but, it seemed that perhaps the NCD board should not have one. Since I did not find this in the documentation (or that I did not know where to look), I figured I would ask.

Thus the question: Should each of the boards have it’s own power supply? Or, does the NCD board draw parasitic power from the Pi 3B? Before I release the magic smoke again, I figured that I would make sure.

Any input is greatly appreciated.


The current monitor will need is own power supply.