SpeedyBee F405 Mini 20x20 Flight Controller
by Speedybee

SpeedyBee F405 Mini 20x20 Flight Controller

The SpeedyBee F405 Mini is a high-performance, compact flight control system designed for 2-inch to 4-inch micro drones and lightweight 5-inch racing airframes. Built around the powerful STM32F405 MCU, this controller brings "big-board" features to a 20x20mm form factor, including an integrated Bluetooth chip for wireless configuration via the SpeedyBee App. This allows pilots and engineers to perform field tuning, sensor calibration, and port assignments directly from a smartphone, eliminating the need for a laptop at the launch site.

Engineered for the evolving sUAS market, the F405 Mini features an onboard 4-level battery voltage indicator for quick pre-flight checks and a built-in barometer for precise altitude sensing. It is fully compatible with both analog and digital systems, offering a dedicated 9V 3A BEC and a specialized solder-pad array for a pin-to-pin connection with DJI O3 and other Air Units. With its high-precision ICM42688P Gyro powered by an independent LDO, it delivers the noise-free data required for smooth, professional-grade flight characteristics in both tactical and hobbyist applications.

Technical Specifications

• Microcontroller: STM32F405 (168MHz)

• IMU (Gyro): ICM42688P (Independent LDO power)

• Barometer: Built-in

• OSD Chip: AT7456E (Analog support)

• Blackbox: 8MB Onboard Flash Memory

• Wireless Tuning: Built-in Bluetooth (SpeedyBee App compatible)

• Power Input: 3S - 6S LiPo (Powered via ESC harness or G/V pads)

• BEC Outputs: 5V @ 2A, 9V @ 3A, 4.5V @ 1A (for GPS/RX), 3.3V @ 500mA

• UARTs: 6 sets (UART 1, 2, 3, 4 for BT, 5 for ESC Telemetry, 6)

• I2C Support: SDA & CL pads for Magnetometer/Compass

• Mounting Pattern: 20 x 20mm (3.5mm hole diameter, M2/M3 compatible)

• Weight: 9.6g

• Dimensions: 30.0mm x 32.0mm x 7.8mm

What is Included

• 1x SpeedyBee F405 Mini 20x20 Flight Controller

• 1x 8-pin JST SH1.0 Cable (30mm, for FC-to-ESC connection)

• 1x DJI 6-pin Cable (80mm, for digital VTX connection)

• 5x M2 Silicone Anti-vibration Grommets

• 5x M3 Silicone Anti-vibration Grommets

• 1x Manual & App Download QR Card