4 layers52.5 × 22.9 mm

Feather STM32WB55
makeristic/Feather_STM32WB55
KiCad STM32WB55 Bluetooth development board in the Adafruit Feather form factor, with USB-C and STEMMA QT. Work in progress.
50 parts2MIT
KiCad boards from 3 GitHub repositories tagged “stemma-qt”, the most starred first; open any of them in PCBKit.

makeristic/Feather_STM32WB55
KiCad STM32WB55 Bluetooth development board in the Adafruit Feather form factor, with USB-C and STEMMA QT. Work in progress.

FrancoSpitale/sht45-qt
SHT45 temperature/humidity breakout, Qwiic/STEMMA QT compatible — KiCad 9, open hardware (MIT)

makeristic/STUSB4500_Breakout
KiCad USB-C Power Delivery sink breakout using STUSB4500, with STEMMA QT I2C, screw-terminal output and RGB indication. Work in progress.