Holybro Kakute F405 Wing Mini Flight Controller

The Holybro Kakute F405 Wing Mini is a compact flight controller for small fixed-wing aircraft, flying wings and small UAVs. It pairs an STM32F405 with a low-noise ICM-42688-P IMU on its own LDO, runs INAV, ArduPilot or Betaflight, and moves power handling onto a separate power board so it fits tight fuselages.

Key features

• Power board takes 2–8S LiPo, with 110 A continuous (132 A peak) current sensing and two ESC power pads
• Two 3 A BECs (4.8 A peak): 5 V for electronics and a selectable 5.3 V / 7.2 V rail for servos
• SPL06 barometer, AT7456E analog OSD and 128 Mbit blackbox flash on board
• 5 UARTs (UART3 with built-in inversion), 7 PWM outputs and an I2C port for an external compass or airspeed sensor
• USB-C extension board for configuration once the FC is buried in the airframe

Specifications

• MCU: STM32F405RGT6, 168 MHz, 192 KB RAM, 1 MB flash
• IMU: ICM-42688-P (SPI)
• Barometer: SPL06
• OSD: AT7456E
• Blackbox: 128 Mbit flash
• UARTs: 5 (1, 2, 3, 5, 6)
• PWM outputs: 7 (PWM7 defaults to NeoPixel LED)
• Input voltage: 7.4–36 V (2–8S LiPo)
• 5 V BEC: 3 A continuous, 4.8 A peak
• Servo BEC: 5.3 V or 7.2 V, 3 A continuous, 4.8 A peak
• 3.3 V output: 150 mA
• Current sensor: 110 A continuous, 132 A peak
• Mounting: 20 × 20 mm, M2
• Weight: 17 g with USB extension board
• Firmware: INAV 7.1.2 or later, Betaflight 4.5.6 or later, ArduPilot

The board has no built-in VTX or receiver: add an analog VTX to carry the OSD and connect a serial receiver such as ELRS or Crossfire to a free UART.