SpeedyBee F405 Mini BLS 35A 20×20 Stack Flight Controller
Description: The SpeedyBee F405 Mini BLS 35A 20×20 Stack is a compact and full-featured electronics stack for UAVs in a 20×20 mm form factor. The kit includes the SpeedyBee F405 Mini flight controller and the SpeedyBee BLS 35A 4-in-1 ESC, creating a reliable, optimized, and easy-to-configure flight control system for mini and lightweight drones.
Brand: SpeedyBee. Category: Drones & Quadcopters > Stacks (FC+ESC).
Key Advantages and Purpose
This stack is designed for pilots and builders seeking a combination of compactness and high performance. With its 20×20 mm size, it is ideal for small frames and lightweight builds where space is limited but full functionality is required: stable control, support for modern video transmitters, and convenient wireless configuration via Bluetooth.
Features of SpeedyBee F405 Mini BLS 35A 20×20 Stack
- 1. SpeedyBee F405 Mini Flight Controller: Equipped with a powerful STM32F405 processor, built-in gyroscope, and accelerometer for stable control. Supports various flight modes and has a rich set of inputs/outputs for connecting peripherals.
- 2. SpeedyBee BLS 35A Speed Controller: 4-in-1 ESC with a true continuous current of 35A per channel, ensuring precise response and stable operation of powerful motors.
- 3. Compact 20×20 mm Design: Ideal for mini-drones and frames with limited space.
- 4. Betaflight Support: Full compatibility with Betaflight for flexible PID settings, flight modes, and OSD.
- 5. Built-in BLHeli-S Support: ESC works with the BLHeli-S protocol for precise and efficient motor control.
Detailed Technical Specifications
| Specifications | Description |
|---|---|
| Flight Controller | F405 with built-in Bluetooth chip for wireless Betaflight configuration. Battery voltage display, built-in barometer, DJI Air Units support. 4 UART ports, two BEC outputs (5V 2A and 9V 3A). |
| ESC (BLHeliS Mini 35A 4-in-1) | 4 synchronized outputs, 35A continuous current, TVS protective diode, Bluetooth configuration support. |
| Wireless Configuration via Bluetooth | Supports PID, OSD, and other parameter configuration via the SpeedyBee app. |
| Powerful True 35A 4-in-1 ESC | 6-layer board, optimized circuit design, continuous current output, TVS protective diode, filtering capacitors. |
| Clean Gyro Power | Gyro voltage supplied independently using a MaxLinear LDO chip and filtering tantalum capacitors for stable sensor performance. |
| Battery Voltage Indicator | 4-level indicator on the side of the flight controller for quick power status check. |
| Wireless Motor Direction Change | Supports changing motor rotation direction via the SpeedyBee app without wiring modifications. |
| DJI Digital Video Transmitter Support | Two independent BECs (9V 3A and 5V 2A), supports various analog transmitters and DJI Air Units for digital video transmission. |
| M2/M3 Screw Compatibility | Supports M2 and M3 screws; kit includes two sets of M2 and M3 screws and silicone grommets for mounting. |
| TVS Protective Diode and Low-ESR Capacitor | TVS protective diode and 470uF low-ESR capacitor for enhanced ESC protection against voltage spikes. |
| Additional Features | 4 UARTs, two independent BECs, GPS power via USB, FPV camera bays (17mm), built-in barometer, 8MB Blackbox memory. |
The SpeedyBee F405 Mini BLS 35A 20×20 Stack is a balanced solution for building a reliable control system on mini-drones: refined motor control thanks to the BLHeli-S ESC, fast wireless configuration via Bluetooth, DJI Air Units support, and a well-tuned hardware with clean gyro power and robust protection. The presence of two BECs allows connecting both analog video transmitters and modern digital modules, while 4 UART ports and 8MB Blackbox open up wide possibilities for telemetry integration and flight data recording. If you are building a compact and technological quadcopter or a racing mini-drone, this stack will provide the necessary stability and control precision.
Other products in this category can be found here Stacks (FC+ESC)
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