All the details I know of the power supply are in the previous reply, and all the LED’s were lit at 1/3 brightness (which I set via code) when wired through the XIAO’s 3.3V terminal. I am more wondering if there is an issue with XIAO’s chip when dealing with 50 Hz vs 60 Hz. That was the only difference when changing from a USB-C connection from my laptop to a USB-C connection from the power supply.