A Raspberry Pi Pico clone with a USB-C port.
It's [current year]. Micro-USB is old news. But board designers are, for some reason, still using it. I dunno, it might be a little cheaper/simpler. Maybe you don't technically need USB-C anway if you're not using USB 3.0. But, in my experience, USB-C is just so much better; there is hardly any reason to not use it.
In the spirit of the original Pico design:
These design files are made available openly, with no limitations.
Permission to use, copy, modify, and/or distribute this design for any purpose with or without fee is hereby granted.
THE DESIGN IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS DESIGN INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS DESIGN.