Things I Learned: USB-C PD Standard and Voltage/Current Levels

 I've been plunking through our household chargers and power supplies with a few USB-C breakout boards I purchased at Adafruit.

As I mentioned previously, it's not immediately obvious which power supplies will do what, and thankfully the Adafruit boards in combination with my power supplies—so far—down-step their voltage if they don't think they can provide enough current. Today, I moved a step towards making this whole process more deterministic when I found a link to the USB power distribution (USB PD) standard on Wikipedia. The tables there at the time of this writing show:

I still need to build a table of what portable chargers I can acquire, but this is a good start to—I hope—a really nice backpack or Project ThreeCans supply.