BrotherHobby Returner F405 V2 Betaflight Flight Controller 3-6S, STM32F405RET6, ICM42688, Type-C

Overview

The BrotherHobby Returner 3-6S F405 V2 Betaflight flight controller is built around an STM32F405 main control chip and an ICM42688 6-axis motion sensor. It supports bidirectional DShot digital throttle communication and is designed for multirotor builds including 5–13 inch drones.

Key Features

• MCU: STM32F405RET6 (168 MHz)
• IMU: ICM-42688; gyroscope sampling rate up to 8KHz
• AT7456E OSD and SPL06-001 barometer
• Blackbox support with 16M flash capacity
• Dual independent BEC outputs: 5V/2A and 9V/2A (9V noted for DJI digital HD video transmission; 5V for analog camera/VTX/LED strips)
• Supports 8 motor outputs (M1–M8)
• USB Type-C port
• DJI interface via 6-pin connector; DJI air unit direct insertion terminal block noted
• External LED support, buzzer and RSSI support
• PCB noted with 1oz thick copper sheet

Specifications

What’s Included

• F405 V2 flight controller x1
• M3*8mm silicone case x5
• SH 1.0mm 8pin 15mm flat cable x1
• DJI 6pin flat cable x1

Wiring / Interfaces (Reference)

• Peripherals shown: camera, buzzer, 5.8GHz VTX (image transmission), LED, GPS
• Receiver types shown: DSM receiver, SBUS receiver, IBUS receiver, CRSF receiver
• DJI air unit wiring reference shows: 7.4-26.4V, GND, RX, TX, GND, SBUS
• Interface definition text shown: GND (negative pole), VCC (battery voltage detection signal output), M1–M4 (throttle signal inputs corresponding to ESC No.1–No.4), CUR (current detection signal output), NC (no defined pins)

For setup and wiring assistance, contact support@rcdrone.top or visit https://rcdrone.top/.

Details

The Returner F405 V2 flight controller uses an STM32F405 MCU with an ICM42688 6-axis gyro and supports bidirectional DShot.

The Returner F405 V2 flight controller uses a USB-C port and dual independent 5V/9V BEC outputs for powering accessories like VTX, LEDs, or DJI digital video.

The Returner F405 V2 flight controller uses an STM32F405RET6 processor rated at 168MHz and features a USB-C port for convenient setup.

The Returner F405 V2 flight controller supports up to 8 motor outputs and includes a direct DJI Air Unit connector plus a built-in barometer.

The Returner F405 V2 flight controller uses an ICM42688 gyro (8 kHz) and 16MB flash memory for storing flight logs, with a USB-C port for easy connectivity.

The BrotherHobby Returner F405 V2 flight controller supports 3–6S input, uses a 38.5×38.5mm board with 30.5×30.5mm mounting, and includes silicone grommets plus SH 8‑pin and DJI 6‑pin flat cables.

The Returner F405 V2 provides clearly labeled pads for connecting a camera, 5.8GHz VTX, buzzer, LED strip, common receiver types, and GPS.

The Returner F405 V2 pad layout supports Airunit wiring with 7.4–26.4V power, UART RX/TX, ground, and SBUS signal connections.