RF.Guru µPico PCB https://shop.rf.guru/products/2023-p-104
Schematic https://github.com/Guru-RF/MicroPico/hw/schematic.pdf
(bom, pick and place, gerber and the stl for the enclosure you can find in https://github.com/Guru-RF/MicroPico/tree/main/hw)
OSHWlab Link https://oshwlab.com/rf.guru/2022-k-104-picousbstick
In https://github.com/Guru-RF/MicroPico/tree/main/src you can find the sourcecode and lot's of examples
At https://circuitpython.org/board/rfguru_rp2040/ you can find the latest circuitpython firmware for the board !
The source code of circuitpython and our board defination you can find here: https://github.com/adafruit/circuitpython/tree/main/ports/raspberrypi/boards/rfguru_rp2040