4 layers50.5 × 29.5 mm

Colobus hardware
tihmstar/colobus_hardware
RP2040 based iPhone (lightning) UART cable, that actually works (hardware)
57 parts39CERN-OHL-S-2.0
Boards in 2 GitHub repositories, designed in KiCad, that use the FSUSB63UMX by onsemi (-40℃~+85℃ 2.7V~4.4V UMLP-12(1.8x1.8x0.55) Interface - Specialized ROHS). See how each wires it, with its parts, size, README and files; the FSUSB63UMX’s symbol, footprint and pinout are on its own page.

tihmstar/colobus_hardware
RP2040 based iPhone (lightning) UART cable, that actually works (hardware)

Tinkerbug-Robotics/TinkerRocket
Model rocket flight computer, ground station, iOS app, and simulation

Tinkerbug-Robotics/TinkerRocket
Model rocket flight computer, ground station, iOS app, and simulation