Like many of us, I had a bunch of various wall-warts lying around, but sadly though none of them produced a regulated 5V/3.3V. I had some 78xx regulators around, so I went into KiCad and made a board to make those wall-warts useful! Changing the world...
USB modules take 0.9 amps peak, and 0.5 amps typical. That is 2.5 watts typical. The Coral Dev Board single-board computer with Edge TPU specifies a USB-C source with up to 3A, that's 15W or as much as my first soldering iron. The heatsink and fan are...