8 layers35 × 35 mm

OpenAIO
OpenDrone-hw/OpenAIO
Open-source AIO for 2-6S toothpick quads: flight controller, 4-in-1 AM32 ESC and ExpressLRS receiver, 25.5x25.5 mm.
343 parts19CERN-OHL-S-2.0
KiCad boards from 2 GitHub repositories tagged “aio”, the most starred first; open any of them in PCBKit.

OpenDrone-hw/OpenAIO
Open-source AIO for 2-6S toothpick quads: flight controller, 4-in-1 AM32 ESC and ExpressLRS receiver, 25.5x25.5 mm.

OpenDrone-hw/OpenAIO-Whoop
Open-source 1S whoop AIO: flight controller, 4-channel brushless ESC, ExpressLRS receiver and analog VTX, 25.5x25.5 mm. Planned.