I wired up 5v power from the Axoloti to a midi splitter board from Meeblip. Now I am too chicken to power it up. Is the 5v there for reference only or can it supply enough mA to the midi splitter?
If you're using the 5v pins in the back, the splitter runs on 5v, and the polarity isn't reversed, it should be fine. I'm using the pins to power a Teensy and have left it on for hours at a time.