Project Overview

OpenDrone HW FC F405 is a fully open-source flight controller hardware platform designed for drones. The project has been developed to provide an affordable, customizable, and transparent alternative to commercial flight controllers while maintaining professional-grade performance and reliability.

The controller is built around the STM32F405 high-performance ARM Cortex-M4 microcontroller, providing sufficient computational capability for modern flight control firmware such as Betaflight, INAV, and ArduPilot-compatible developments. The design emphasizes modularity, maintainability, and ease of manufacturing while remaining suitable for real-world flight applications.

Design Objectives

• Create a completely open-source flight controller hardware platform.
• Provide an educational reference design for embedded systems.
• Support future hardware expansion and firmware customization.

Key hardware:

1. Main controller: STM32F405 ARM Cortex-M4 MCU
2. DC-DC converter from maximum 28V input to 5V and 3V3.
3. Communication interface:
4. Inertial Measurement System
5. Gyroscope and accelerometer: ICM42688
6. Magnetometer: QMC5883L
7. Barometer: BMP280
8. Communication interfaces: ST-Link, 2 x UART, 1 x SPI, 1 x I2C

Schematic

Dimension

• Board size: 34x34 mm.
• Through hole: 26x26 mm.

Contact

If you interested in this project, please feel free to contact me by email or search more related OpenDrone projects in my Github repo:

• Email: thanhphongho1998@gmail.com
• Git: phonght32 (Phong Ho)