The BeeBrain BLV3 Flight Controller Flight Controller!

The latest iteration of the BeeBrainBL contains massive improvements to the performance of the built in FrSky Receiver and built in video transmitter.

In addition, the MOSFETs were upgraded to support the power demands of micro toothpick drones.

The solder pads on each ESC were enlarged to enable custom builds! With plenty of surface area and spacing, you can now solder on any motor of your choosing. One of our favorite applications of the BeeBrain BL is in micro drones. Since the BeeBrain BL integrates the flight controller, ESCs, receiver, and video transmitter all in one package, it's insanely easy and clean to build.

Receiver Improvements - 50% More Range

  1. Optimized SPI Receiver hardware to improve efficiency within the receiver.
  2. Removable antennas.
  3. Additional low noise amplifier to increase range.
  4. Optional wiring harness is included to install an external receiver (Crossfire, Ghost, etc)

Video Transmitter Improvements - 120mW

  1. New heatsink and layout to increase heat dispersion and efficiency.
  2. Transmitting power increased to 120mW from 25mW (V2)


  • STM32F411 MCU
  • ESC Firmware: Ships with JESC 48 KHz. BLHeli_s capable.
  • ESC Specifications: 4 channel 12A ESC
  • Weight: 6 grams (including antennas and battery connector)
  • Size: Outer dimensions 29 x 29 x 7.6 mm
  • Holes: 25.5 x 25.5 mm
  • Battery input: 1 – 2 S
  • UART2 TX and RX free for external receiver (un-inverted SBus signal only)

Note: The default power mode is low (5mW). Set the power level to medium (50mW) before flying.


Note: This product is just the Flight controller and hardware. Camera and Canopy are not included.

Manual for using an external receiver.
Betaflight 4.2.9 AcroBee65 Tuned Firmware: Link
Betaflight 4.1.7 Base (No tuning) Firmware: Link
Betaflight 4.2.9 Base (No tuning) Firmware: Link

Github Repository: Link

Build Suggestions

Customer Reviews

Based on 16 reviews
Works fine for me

Using with a cockroach frame, NBD 0802 Gold motors with plugs, BeeEye camera, goober canopy, and FrSky X9D + XJT JR module (for D8 Tx/Rx).

Haven't had any issues so far with overheating or VTX signals flying around my apartment and a warehouse. Could see this being a little difficult if you're trying to solder wires or motors to it, but should be managable if you're careful. Will update review if and how it dies on me.

Have heard that it is not allowed for certain race/comps due to VTX/interference issues (whooptopia?), but I'm not racing it so this is not an issue for me.

benjamin de la calle
I dont know how to change the power level to medium

I tried flying it and it wont lift off. After closer inspection to the specifications I learned that I might need to change the power level but I cant figure out how. I looked all through betaflight and just couldnt find it.

Lee Aamold
Issue with BLV3 Flight controller

There seems to be an issue with this flight controller. The vtx has very poor range and is overheating and totally flashing out and back on. I have ordered many of these boards and have not ever had this issue. Can I send this back and get a replacement?

Great FC for any build

Absolutely love this fc. I have this on a mosquito xl with 1102 18000kv on 2.5" props. Far from the recommended 12000kv for 2.5" props. This thing takes those extra amps like a champ! Adding an external rx is incredibly easy contrary to other reviews. Its literally a plug so not sure how it could be any easier. Personally I just run the one board on this build and thanks to the integrated rx and vtx my auw on a 2.5" is 50gs!!! Couldn't recommend this board more.

Luke Bennett
Still not suitable for self build

If you want to use external RX and don't have many years experience repairing SMT electronics, I'd recommend buying basically anything else at all, even just a cup of coffee will make you feel better than this.
Also .8mm JST is not available anywhere but this website. Avoid buying unless you get multiple.