BrotherHobby Returner F405 V3 Flight Controller 3-6S STM32F405 ICM-42688 Type-C Betaflight

Overview

The BrotherHobby Returner 3-6S F405 V3 flight controller is an STM32F405-based FC designed for 30.5x30.5mm builds, featuring an ICM-42688 IMU, AT7456E OSD, SPL06-001 barometer, and 16M onboard flash for Blackbox logging. It supports bidirectional DShot and is listed as supporting Betaflight and ArduPilot firmware.

Key Features

• MCU: STM32F405RET6 (listed frequency: 168MHZ)
• IMU: ICM-42688 six-axis motion sensor
• Bidirectional DShot digital throttle communication support
• Built-in OSD: AT7456E
• Built-in barometer: SPL06-001 (real-time altitude sensing)
• Blackbox logging: 16M flash memory
• Dual independent BEC outputs: 5V/2A and 10V/2A (10V rail includes an LC filter as described)
• USB port: Type-C
• Up to 8 motor outputs: M1-M8
• DJI Air Unit support: direct insertion terminal block and soldering support
• 6-layer PCB design with 1oz copper thickness (as described)
• Gyroscope independently powered (as described) to enhance filtering and anti-interference capability
• Supports external LED, buzzer, and RSSI

For wiring/firmware setup assistance, contact https://rcdrone.top/ or email support@rcdrone.top.

Specifications

Connection Notes (as labeled)

• GND: Ground wire (negative pole of the power supply)
• VCC: Battery voltage detection signal output interface (output is battery voltage)
• M1/M2/M3/M4: Throttle signal input interfaces corresponding to motor No.1/No.2/No.3/No.4
• CUR: Current detection signal output interface (connect to the flight control current detection port)
• TEL: Telemetry interface

What’s Included

• BrotherHobby F405 V3 flight controller
• M3*8mm silicone case
• SH 1.0mm 8pin 30mm flat cable
• DJI 6pin flat cable

Applications

• 3S-6S FPV multirotor builds using 30.5x30.5mm mounting
• Betaflight setups (target listed: betaflight_4.5.0 BROTHERHOBBYF405 V3)
• ArduPilot-compatible builds (support listed)
• Integration with camera, 5.8GHz VTX, GPS, external LED, and popular receivers (SBUS/IBUS/DSM2/X/TBS/CRSF)

Details

The Returner F405 V3 flight controller uses an ICM42688 6‑axis motion sensor and supports bidirectional DShot with Betaflight or ArduPilot firmware.

The BrotherHobby Returner F405 V3 flight controller uses an STM32F405RET6 main control chip (168MHz) on a 6-layer, 1oz copper board design.

The Returner F405 V3 flight controller features a dual independent 10V2A and 5V2A BEC power supply with added LC filtering for steadier video transmission power.

BrotherHobby Returner F405 V3 flight controller uses a self-written PID algorithm for 5–13 inch drones and supports 8 motor outputs.

The BrotherHobby Returner F405 V3 flight controller includes a DJI Air Unit direct-insertion connector, a built-in barometer, and 16MB flash for storing flight logs.

BrotherHobby Returner F405 V3 flight controller uses a 30.5x30.5mm mounting pattern and includes silicone grommets plus SH 8-pin and DJI 6-pin cables for wiring.

BrotherHobby Returner F405 V3 wiring supports common FPV peripherals including camera, 5.8G VTX, LED, SBUS/CRSF/DSM receivers, GPS, and an air unit.