6 layers26.9 × 26.9 mm
OpenFC
OpenDrone-hw/OpenFC-Lite-Mini
Open-source Betaflight flight controller. RP2354A, 20x20 mm, 6-layer, 3-6S, CERN-OHL-S-2.0.
131 parts147CERN-OHL-S-2.0
6 layers37.9 × 37.9 mm
Open-source Betaflight flight controller. RP2354B, 30.5x30.5 mm, 6-layer, 3-8S, CERN-OHL-S-2.0.
- Size
- 37.9 × 37.9 mm
- Copper layers
- 6
- Thickness
- 1 mm
- Parts
- 164
- Nets
- 106
- Pads
- 579
- Tracks, vias
- 1,157, 596
- Pours
- 19
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Jun 2026
- Updated
- 25 Oct 2026
Overview
OpenFC is an open-source printed circuit board by OpenDrone-hw, from the OpenDrone-hw/OpenFC-Lite repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 6-layer board of 37.9 × 37.9 mm with 164 parts on 106 nets, routed with 1,157 tracks and 596 vias.
It is built around the RP2354B, COS8051SOT and SM06B-SRSS-TB(LF)(SN), with the BMI270, LP5912-3.3DRVR and SM03B-SRSS-TB(LF)(SN) among its other parts. Its parts include 55 connectors, 40 capacitors, 36 resistors, 13 ICs and 8 diodes. It belongs with the robots and motor control boards and the RP2350 boards of this library.
Main components
12
RP2354B
QFN-80-EP(10x10)-20℃~+85℃ 12bit 150MHz 2MB 32 Bit 48 520KB ARM Cortex-M33 Built-in+External External pin reset (NRST)、True random number generator (TRNG) OTP QFN-80-EP(10x10) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
COS8051SOT
SOT23-5-2.25V~2.25V -40℃~+125℃ 1 100MHz 100mA 125dB 150V/us 1pA 2.5V~5.5V 2.5pA 2.6mA 2uV/℃ 5mV 8nV/√Hz@1kHz Built-in compensation Rail-to-Rail Input, Rail-to-Rail Output SOT23-5 Operational Amplifier ROHSCOSINEOperational Amplifier
SM06B-SRSS-TB(LF)(SN)
SMD,P=1mm,卧贴-25℃~+85℃ 1 1A 1mm 1x6P 2.9mm 4.32mm 50V 6 6P 8mm Auxiliary Solder Pin Copper alloy PA SH Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1mm,Surface Mount，Right Angle Wire To Board Connector ROHSJSTWire To Board Connector
BMI270
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 3.5uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps LGA-14(2.5x3) Accelerometers ROHSBosch SensortecAccelerometers
LP5912-3.3DRVR
WSON-6-EP(2x2)-40℃~+125℃@(Tj) 1 12uVrms 180mV@(500mA) 3.3V 30uA 500mA 6.5V 75dB@(1kHz) Fixed Over Temperature Protection、Reverse connection protection、Soft Start、Short Circuit Protection Positive WSON-6-EP(2x2) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SM03B-SRSS-TB(LF)(SN)
SMD,P=1mm,卧贴-25℃~+85℃ 1 1A 1mm 1x3P 2.9mm 3 3P 4.32mm 50V 5mm Auxiliary Solder Pin Copper alloy PA SH Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
0201WMF1003TEE
0201-55℃~+155℃ 100kΩ 25V 50mW Thick Film Resistor ±1% ±200ppm/℃ 0201 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount0201WMF1001TEE
0201-55℃~+155℃ 1kΩ 25V 50mW Thick Film Resistor ±1% ±200ppm/℃ 0201 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount0201WMF5101TEE
0201-55℃~+155℃ 25V 5.1kΩ 50mW Thick Film Resistor ±1% ±200ppm/℃ 0201 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount
XL-1005UGC
0402-40℃~+85℃ 120° 1mm x 0.5mm square LED 249mcd 25mA 3V 516nm~531nm 531nm 80mW Discrete Diode Emerald Green Top-mount Water Clear 0402 LED Indication - Discrete ROHSXINGLIGHTLED Indication - DiscreteNQ01WMJ0300TEE
0201-55℃~+155℃ 25V 30Ω 50mW Thick Film Resistor ±200ppm/℃ ±5% 0201 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface Mount
CL21A475KBQNNNE
08054.7uF 50V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
README
README.mdOpenFC-Lite
Open source Betaflight flight controller built on the RP2354B, 30.5 x 30.5 mm mounting pattern, part of the incutec OpenDrone line.
Specifications
| Firmware | Betaflight |
| MCU | RP2354B |
| IMU | BMI270 |
| Barometer | None |
| Blackbox | microSD |
| OSD | Analog and digital |
| UARTs | 4 |
| Motor outputs | 4x DShot, bidirectional |
| RX | External, CRSF or SBUS |
| Input | 3-8S* LiPo (9.0-33.6 V) |
| BEC | 10 V switchable + 5 V always-on, 3.5 A |
| Current sense | Yes |
| USB | USB-C |
| Mounting | 30.5 x 30.5 mm, 4.0 mm holes |
| Dimensions | 37.9 x 37.9 mm |
| PCB | 6-layer, 1.6 mm |
- Also runs on 2S; the 10 V VTX output then follows the battery voltage instead of holding 10 V.
Technical write-up, part list and layout constraints: AGENTS.md.
Firmware
Betaflight, target OPENFC_LITE_RP2350B. The image is in
firmware/; older ones are in firmware/archive/.
If the analog OSD stays blank, run feature -LED_STRIP and then save in the
Betaflight Configurator CLI (the LED strip is then off). A firmware update
that runs the OSD and the LED strip together is in progress.
In the line
What pairs with what, and what is available: opendrone.be.
Contributing
See CONTRIBUTING.md.
License
Hardware licensed under CERN-OHL-S-2.0, see LICENSE.
Parts
164| Qty | Value | Footprint | References |
|---|---|---|---|
| 53 | 5V | lib:small_pad | J1, J2, J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23 +37 |
| 25 | 100n | Capacitor_SMD:C_0201_0603Metric | C1, C3, C10, C11, C12, C13, C14, C15, C16, C17, C18, C24, C25, C30, C33, C34 +9 |
| 5 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C2, C19, C20, C21, C31 |
| 4 | 100k | Resistor_SMD:R_0201_0603Metric | R1, R17, R21, R23 |
| 4 | 10k | Resistor_SMD:R_0201_0603Metric | R2, R9, R29, R30 |
| 4 | 1k | Resistor_SMD:R_0201_0603Metric | R5, R6, R7, R8 |
| 4 | 5.1k | Resistor_SMD:R_0201_0603Metric | R3, R4, R13, R14 |
| 4 | 75R | Resistor_SMD:R_0201_0603Metric | R15, R16, R31, R38 |
| 4 | LED_1_Green | LED_SMD:LED_0402_1005Metric | D4, D5, D7, D9 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1, TP2, TP3, TP4 |
| 3 | 30R | Resistor_SMD:R_0201_0603Metric | R10, R11, R12 |
| 3 | 510R | Resistor_SMD:R_0201_0603Metric | R28, R36, R37 |
| 2 | 2.4k | Resistor_SMD:R_0201_0603Metric | R18, R26 |
| 2 | 20p | Capacitor_SMD:C_0201_0603Metric | C4, C8 |
| 2 | 22uF | Capacitor_SMD:C_0603_1608Metric | C26, C27 |
| 2 | 22uF | Capacitor_SMD:C_0402_1005Metric | C32, C42 |
| 2 | 4.7uF 50v | Capacitor_SMD:C_0805_2012Metric | C22, C23 |
| 2 | AP1606 | lib:DFN-3L_L1.0-W0.6-P0.65-BR | Q1, Q2 |
| 2 | DSK24 | lib:SOD-123_L2.8-W1.8-LS3.7-RD | D6, D10 |
| 2 | LMR51635YDDCR | lib:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | U6, U16 |
| 2 | SM06B-SRSS-TB(LF)(SN) | lib:CONN-SMD_SM06B-SRSS-TB-LF-SN | U8, U14 |
| 2 | XRTC303020D4R7MBCA | lib:IND-SMD_L3.0-W3.0_AFE303020S | L2, L3 |
| 1 | 1.4k | Resistor_SMD:R_0201_0603Metric | R34 |
| 1 | 12k | Resistor_SMD:R_0201_0603Metric | R33 |
| 1 | 19.1k | Resistor_SMD:R_0201_0603Metric | R24 |
| 1 | 1uF | Capacitor_SMD:C_0402_1005Metric | C38 |
| 1 | 3.9k | Resistor_SMD:R_0201_0603Metric | R32 |
| 1 | 470p | Capacitor_SMD:C_0201_0603Metric | C36 |
| 1 | 6.49k | Resistor_SMD:R_0201_0603Metric | R39 |
| 1 | 680R | Resistor_SMD:R_0201_0603Metric | R35 |
| 1 | 7.5k | Resistor_SMD:R_0201_0603Metric | R25 |
| 1 | 8.87k | Resistor_SMD:R_0201_0603Metric | R22 |
| 1 | AOTA-B201610S3R3-101-T | lib:IND-SMD_L2.0-W1.6_AOTA-B201610S3R3-101-T | L1 |
| 1 | BMI270 | lib:LGA-14_L3.0-W2.5-P0.50-BR | U9 |
| 1 | COS8051SOT | lib:SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BR | U11 |
| 1 | LED_1_Blue | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | LP5912-1.8DRVR | lib:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm_ThermalVias | U15 |
| 1 | LP5912-3.3DRVR | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm | U7 |
| 1 | RP2354B_C39843328 | lib:QFN-80_L10.0-W10.0-P0.40-TL-EP3.4 | U2 |
| 1 | SDM02U30LP3-7B | lib:X3-DFN0603-2_L0.6-W0.3-RD | D8 |
| 1 | SM03B-SRSS-TB | lib:CONN-SMD_SM03B-SRSS-TB-LF-SN-P | U13 |
| 1 | SM04B-SRSS-TB | lib:CONN-SMD_4P-P1.00_SM04B-SRSS-TB-LF-SN | CN1 |
| 1 | SM08B-SRSS-TB(LF)(SN) | lib:CONN-TH_SM08B-SRSS-TB-LF-SN | P1 |
| 1 | SN74LVC1G3157DTBR | lib:X2SON-6_L1.0-W0.8-BL | U10 |
| 1 | TF PUSH | lib:TF-SMD_TF-PUSH | Card1 |
| 1 | TLV7031DPWR | lib:X2SON-4_L0.8-W0.8-P0.48-TL-A | U12 |
| 1 | TS2306A 240GF MSM 9_C2976675 | lib:SW-SMD_4P-L3.0-W2.0-P0.85-LS3.5 | U1 |
| 1 | TYPE-C 16P QTWT | lib:USB-TYPE-C-SMD_TYPE-C-16P-QTWT | USB1 |
| 1 | XTM25012000JT00351001 | lib:CRYSTAL-SMD_4P-L2.5-W2.0-BL-A | X1 |
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Questions
How big is the OpenFC PCB?
It measures 37.9 × 37.9 mm and has 6 copper layers, 1 mm thick.
What parts does the OpenFC use?
164 parts, built around the RP2354B, COS8051SOT, SM06B-SRSS-TB(LF)(SN) and BMI270. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the OpenFC KiCad files?
From the OpenDrone-hw/OpenFC-Lite repository on GitHub, at the commit this page was made from: the board is hardware/OpenFC.kicad_pcb and its schematic hardware/OpenFC.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenFC design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).