8 layers28.9 × 28.9 mm

OpenAIO Whoop
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.
249 parts13CERN-OHL-S-2.0
KiCad boards from 2 GitHub repositories tagged “status-planned”, the most starred first; open any of them in PCBKit.

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.

OpenDrone-hw/OpenRemoteID
Open hardware concept for a standalone Remote ID module: ESP32-C3 plus GNSS receiver. Incomplete, not a compliant product.