I took the schematics of the Sparkfun Pro Micro and changed the USB Micro female connector to a USB C male plug here on github. I hope that it would be able to allow others to prototype with arduino on the framework laptop.
Evidently, it’s a couple millimeters longer, so the casing for the expansion card (if made), would need to be extended a few mm outsidethe laptop.
I’d love to get a PCB for this, but when I got a quote from PCBway, it came out to be a little over $250 for 5 (assembled). It’s obviously expensive for $50/board, but there’s also a chance that I might have made a mistake somewhere too. ¯\_(ツ)_/¯
I picked up the USB-C Adafruit QT Py RP2040 and I’m hoping with a male to male USB-C adapter that it will fit within the space of an expansion module pretty nicely. With the QT (Adafruit’s mini Stemma/Grove connection) I can hook up to an outside sensor or other devices (QT/Stemma hub?) pretty easily and I’m thinking there might be space to leave the short QT cable tucked back inside when it isn’t in use.
Interestingly enough, I missed the USBC branch of the Sparkfun Pro Micro. I’ve updated the Github to use that as a base model for the PCB in the master branch, and moved my previous work into another branch.