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Brain v2 external PS


I'll need to power my two Brain v2's (that are connected via USB) externally/not through the USB port. Either by splitting the USB cable and connecting the 5V/GND to my PSU bypassing the USB host or by connecting the brains directly via the barrel plugs. (Of course the 5V rail is the same as the computer, in my case a RPi, is powered on.)

Would there be a reason not to use the brains' power plugs (when using USB)?



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