4 layers50 × 50 mm

STM32F4 Breakout
PhilCarPi/STM32F4_Breakout_Board
4 layer PCB that serves as a breakout board to an STM32F405 chip with an additional IMU chip just for fun. The breakout is for serial ports SPI, USART, I2C, and SWD.
56 parts2
Open-source boards designed in KiCad by PhilCarPi on GitHub, from 1 repository. A board’s address here is its repository’s there.

PhilCarPi/STM32F4_Breakout_Board
4 layer PCB that serves as a breakout board to an STM32F405 chip with an additional IMU chip just for fun. The breakout is for serial ports SPI, USART, I2C, and SWD.