6 layers31.2 × 33 mm

4in1-mini
OpenDrone-hw/OpenESC-20x20
Open-source 4-in-1 AM32 ESC for FPV drones. 20x20 mm, 2-6S, one MCU per motor, CERN-OHL-S-2.0.
191 parts279CERN-OHL-S-2.0
KiCad boards from 4 GitHub repositories tagged “status-beta”, the most starred first; open any of them in PCBKit.

OpenDrone-hw/OpenESC-20x20
Open-source 4-in-1 AM32 ESC for FPV drones. 20x20 mm, 2-6S, one MCU per motor, CERN-OHL-S-2.0.

OpenDrone-hw/OpenFC-Lite-Mini
Open-source Betaflight flight controller. RP2354A, 20x20 mm, 6-layer, 3-6S, CERN-OHL-S-2.0.

OpenDrone-hw/OpenESC-30x30
Open-source 4-in-1 AM32 ESC for FPV drones. 30.5x30.5 mm, 2-8S, one MCU per motor, CERN-OHL-S-2.0.

OpenDrone-hw/OpenFC-Lite
Open-source Betaflight flight controller. RP2354B, 30.5x30.5 mm, 6-layer, 3-8S, CERN-OHL-S-2.0.

OpenDrone-hw/OpenESC-30x30
Open-source 4-in-1 AM32 ESC for FPV drones. 30.5x30.5 mm, 2-8S, one MCU per motor, CERN-OHL-S-2.0.