Sea-Picro by joshajohnson

Sea-Picro is a RP2040 based board in the Arduino Pro Micro form factor.

Features
* Compatiable with most pro micro based keyboards
* RP2040 microcontroller, with dual M0+ processors at up to 133MHz
* Mid mount USB-C connector, which is low profile and can't be ripped off
* Optional Elite-C style pinout, adding an additional 5 IO for large keyboards
* Single button reset / bootloader circuit which changes behavior based on how long it's held (RP2040 usually requires two buttons to flash new firmware, making it challenging when installed upside down in a keyboard)
* ROM bootloader which prevents board from being bricked
* EXT version has a 5V level shifter and extra pin to drive strings of WS2812 LEDs.
* RST version has a WS2812 LED for use with CircuitPython or as a status indicator on the RST version.
* Onboard power LED.
* IO pinout identical to the Sparkfun RP2040 Pro Micro

#mcu