With your breadboard connected to the Arduino and the power supply plugged into an outlet, plug the Arduino back into the computer with the USB cable. Next, run the Processing code we compiled ...

USB-C and power delivery are not simple standards, but the ability to add a high-speed data interface and a programmable power supply into almost any project has real potential.

This is then used to supply power to a pre-built power supply module that handles current limiting, variable voltage output, and all that fancy stuff. It even comes with a screen built-in!