SpeedyBee F405 Mini V2 Stack - F405 FC + 35A BLS 4-in-1 ESC (20x20)

Specifications

• Flight Controller (F405 Mini):

  • MCU: STM32F405.

  • Gyro: ICM-42688-P (High precision).

  • Wireless: Bluetooth (App Config).

  • Blackbox: 8MB Onboard Flash.

  • Barometer: Built-in.

  • BEC: 5V/2A and 9V/3A (Powers DJI O3 directly).

• ESC (BLS 35A Mini V2):

  • Continuous Current: 35A.

  • Burst Current: 45A (5 seconds).

  • Input Voltage: 3S - 6S LiPo.

  • Firmware: BLHeli_S (J-H-40).

  • Mounting: 20mm x 20mm (M2/M3 grommets included).

Compatibility & Platform Support ????

• DJI Digital FPV: Plug-and-Play. Direct port for O3/Vista/Air Unit.

• Analog FPV : Supported. Includes AT7456E OSD chip for analog video overlay.

• Firmware: Targets Betaflight/INAV (SPEEDYBEEF405MINI).

Key Applications & Projects

• 3.5" Freestyle: The sweet spot for this stack. Perfect balance of weight and power.

• Cinewhoop: Fits easily into tight frames (like Cinelog35) where 30x30 stacks won't fit.

• Long Range Micro: Use the onboard barometer and GPS pads for automated return-to-home missions.

Virtual Technician: Wiring & Safety ⚠️

• Capacitor: Solder the included 470uF capacitor to the XT30/XT60 leads. Do not skip this on 6S builds, or you risk frying the 9V regulator.

• Mounting: The holes are M3 size but come with M2 grommets installed. If your frame uses M3 screws, remove the metal/silicone inserts carefully.

• Motor Direction: You can reverse motor direction wirelessly via the SpeedyBee App—no need to pass-through via BLHeli Configurator on PC.

Accessories

• Included in the Package:

  • 1 x F405 Mini FC

  • 1 x 35A BLS 4-in-1 ESC

  • 1 x 35V 470uF Capacitor

  • 1 x DJI 6-Pin Cable (80mm)

  • 1 x XT30 Power Pigtail

  • 1 x Set of M2 & M3 Silicone Grommets/Screws

Helpful Tutorials & Resources

• SpeedyBee F405 Mini V2 Stack_User Manual 

Frequently Asked Questions (FAQ)

1. Is this the "V2" version? Yes, this includes the updated BLS 35A Mini V2 ESC which is more robust than the V1.

2. Does it support 6S batteries? Yes, it supports 3S to 6S LiPo input.

3. Can I tune it with my iPhone? Yes, the built-in Bluetooth works with the SpeedyBee App on iOS and Android.

4. Is the mounting 20x20 or 30x30? It is 20x20mm. It will not fit frames that only have 30x30 holes.

5. Does it handle DJI O3? Yes, it has a 9V 3A BEC specifically designed to power the DJI O3 Air Unit.

6. What is the maximum current? 35A continuous per channel, with 45A bursts for 5 seconds.

7. Do I need to solder the DJI cable? No, it comes with a plug-and-play cable.

8. Does it have a barometer? Yes, it has an onboard barometer for altitude readings.

9. Can I use Bluejay firmware on the ESC? Yes, the ESCs come with BLHeli_S but are compatible with Bluejay for bidirectional DShot and RPM filtering.

10. What size capacitor is included? A 35V 470uF Low-ESR capacitor.

11. Does it support GPS? Yes, it has free UART pads (TX/RX) to connect a GPS module.

12. Is the USB port Type-C? Yes, it uses a robust Type-C connector.

13. Can I use this on a 5-inch drone? Yes, but only for "Lightweight" or "Ultralight" 5-inch builds. For full-size freestyle bashers, use the 50A stack.

14. How many UARTs does it have? It has 4 usable UARTs plus the dedicated Bluetooth UART.

15. Does it have LED pads? Yes, it has a dedicated LED pad for WS2812 strips.

16. What does the "Battery Indicator" do? The side of the FC has LEDs that light up to show battery voltage instantly when plugged in.

17. Can I flash firmware wirelessly? No, firmware flashing must be done via USB cable on PC. Only configuration is wireless.

18. Does it support ELRS? Yes, connect your ELRS receiver to any free UART (e.g., UART 2).

19. What mounting screws do I need? It comes with screws for both M2 and M3 configurations.

20. Is the XT30 cable pre-soldered? No, you must solder the XT30 pigtail and capacitor yourself.