4 layers

RS232
zeroCountersteer/lib.KiCAD
This is the default project starter for this repository. It is intentionally blank: it contains no RK3399, SBC, or other product-specific circuitry.
19 parts
Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.

zeroCountersteer/lib.KiCAD
This is the default project starter for this repository. It is intentionally blank: it contains no RK3399, SBC, or other product-specific circuitry.