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File 02 · Flight Controller

A flight controller, minus what you don’t need.

An RP2354 dual-core M33 running Betaflight on a 6-layer board: a 6-axis IMU, microSD blackbox, PIO-driven analog OSD (in development), and a switchable 10 V VTX rail. No barometer, no onboard radio. Bring your own RX over UART and keep the board small and cheap.

Model· pick your build

€49.00
SKU OPENFC-LITE-3030incl. VAT · excl. shipping
In stock · ships from Belgium
Better togetherOpenStack: FC + ESC as one stack, one checkout.
01Teardown

Two PIO blocks doing the work of a fistful of chips.

The RP2354 has no analog-OSD peripheral and only two hardware UARTs, so its PIO blocks fake both. One drives the analog OSD front end (a comparator strips the video sync, an op-amp buffers the camera signal, and an SPDT switch injects black and white pixels) while another spins up extra software UARTs. The IMU and the microSD blackbox sit on separate SPI buses, and a switchable 10 V buck feeds the VTX and camera.

  • ①RP2354, dual M33 @ 150 MHz
  • ②6-axis IMU (LGA-14, TDK/ST)
  • ③microSD blackbox, on SPI
  • ④Analog OSD: comparator + op-amp + SPDT
  • ⑤Switchable 10 V VTX buck
Inspect interactively ↗
02Open for learning

Published so you can study it. Produced so you don't have to.

Study

GitHub repo ↗

Schematic · PCB · BOM · 3D STEP · design notes

Iterate

Open issues ↗

Rev candidates · bugs · community discussion

License

CERN-OHL-S v2 ↗

Strong reciprocal: share your changes

Changelog

Commit history ↗

Every revision, public on GitHub

03In the box

Everything that ships, down to the grommet.

Here is the actual parts list. Anything missing from a build, say so and we'll ship it.

  • 1×OpenFC Lite board
  • 1×8-pin JST SH ESC harness
  • 4×M3 rubber soft-mount grommets
  • 1×Build cardbatch ID, QC initials, firmware flash command, GitHub rev

Provenance

  • DesignedLeuven, Belgium · schematic, PCB, BOM, firmware partnerships
  • AssembledShenzhen, China · first runs, while we bring up an EU line
  • NextEU assembly · in planning
04The €1

What you pay, what the people who wrote the firmware get.

€48.00
€1.00
€49.00

€48 for the board.
€1 for the Betaflight ↗ maintainers.

05Datasheet

Every spec, in one table.

Firmware
Betaflight, custom RP2350 target (upstreaming in progress)
MCU
RP2354, dual M33 @ 150 MHz, 2 MB flash
IMU
ST LSM6DSV16X on SPI; LGA-14 footprint also takes TDK ICM-426xx
Blackbox
microSD card (TF-021B)
OSD
Analog, PIO-driven (in development); digital OSD via MSP DisplayPort
Motor outputs
4× DShot, bidirectional telemetry
RX
External, over UART (CRSF/SBUS)
Power
3S–6S; switchable 10 V + always-on 5 V (3 A-rated bucks)
USB
USB-C (config + UF2 flash)
Layers
6
License
CERN-OHL-S-2.0
UARTs
4: 2 hardware + 2 PIO
Size
30.5×30.5 mm, 6-layer

The cost-down trims over the full OpenFC: no barometer, no onboard radio, no SPI blackbox flash. External RX over UART, microSD for blackbox.

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