2 layers40 × 44.8 mm
Polaris
nsreeni07/Polaris
A custom-built TVC rocket with a self-designed STM32F722 flight computer (Madgwick AHRS, dual-axis PID, active gimbal correction) for stable, actively-corrected flight.
82 parts2MIT
2 layers50 × 55 mm
SimpleFlightController
Ningheim/PathfinderA compact 2-layer flight controller built around the STM32F722 — onboard 2S battery charging, IMU + barometer, microSD logging, two servo outputs. Currently working through final layout cleanup before fab.
- Size
- 50 × 55 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 82
- Nets
- 106
- Pads
- 383
- Tracks, vias
- 673, 87
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 May 2026
- Updated
- 7 Aug 2026
Overview
SimpleFlightController is an open-source printed circuit board by Ningheim, from the Ningheim/Pathfinder repository on GitHub. It is a 2-layer board of 50 × 55 mm with 82 parts on 106 nets, routed with 673 tracks and 87 vias.
It is built around the BME280, TPS63070RNMR and DM3C-SF, with the ICM-20948, TS-1088-AR02016 and FCM1608KF-601T03 among its other parts. Its parts include 38 capacitors, 24 resistors, 6 ICs, 4 inductors and 3 connectors. It belongs with the robots and motor control and power boards and the STM32 boards of this library.
Main components
8
BME280
LGA-8(2.5x2.5)-40℃~+85℃ 0%RH~100%RH 1.71V~3.6V 1.8uA 16bit I2C、SPI ±0.5℃ ±3%RH LGA-8(2.5x2.5) Temperature and Humidity Sensor ROHSBoschTemperature And Humidity Sensor
TPS63070RNMR
VQFN-15-HR(2.5x3)-40℃~+125℃@(TJ) 1 2.4MHz 2.5V~9V 2A 2V~16V 50uA Adjustable Buck-Boost Buck-Boost Built-in Yes VQFN-15-HR(2.5x3) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
DM3C-SF
--25℃~+85℃ 1.83mm Connector and Ejector Hinged Lid MicroSD Card (TF Card) No - SD Card / Memory Card Connector ROHSHirose ElectricSD Card / Memory Card Connector
ICM-20948
QFN-24(3x3)-40℃~+85℃ 0.5KB 1.71V~3.6V 16bit 8uA Accelerometer Gyroscope SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24(3x3) Accelerometers ROHSTDK InvenSenseAccelerometers
TS-1088-AR02016
SMD,4x3mm-30℃~+80℃ 1.6N 100,000 cycles 12V 2mm 3.9mm 3mm 50mA Black Round Button SMD(SMT) Tab SPST Surface Mount,Vertical Without Bracket SMD,4x3mm Tactile Switches ROHSXUNPUTactile Switches
FCM1608KF-601T03
0603Ferrite BeadsTA-I Tech
Q13FC13500004
SMD3215-2P-40℃~+85℃ 12.5pF 32.768kHz 70kΩ SMD crystal oscillator ±20ppm SMD3215-2P Crystals ROHSSeiko EpsonCrystals
X322525MOB4SI
SMD3225-4P-40℃~+85℃ 12pF 25MHz 50Ω Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
README
README.mdPathfinder
This is a USB-C powered 2-layer flight controller built around the STM32F722. It's 2S LiPo/Li-ion battery, a 6-axis IMU, a barometer, microSD logging, and two servo outputs. Lots of the sensors I used on this haven't been seen on much other flight controllers including the one I used the guide from. Feel free to use this for hobbyist and competition rocketry!
List of Materials
- MCU: STM32F722RET6
- IMU: ICM-20948 (SPI) — barometer: BME280 (I2C)
- Charger: BQ25887
- Power: TPS63070 buck-boost, LMR51430 buck
- microSD: 4-bit SD card slot
- J1/J3: servo/PWM headers
- J2: 2S battery screw terminal
- SW1 reset, SW2 boot, D1 status LED indicator
- 25MHz HSE + 32.768kHz LSE crystals
- Board: 50x55mm, 2-layer, KiCad
- the hardware folder has the KiCad files. Run lcsc.py first to get parts KiCAD didn't have. This came from the hack club guide.
I decided to implement most of these parts myself to differentiate this project with the guide I followed. This, in turn, made it a little more difficult but I'm extremely excited to get it done!
Power architecture
2S Battery ----> TPS63070 ----> VSYS ----> LMR51430 ----> 3.3V rail
USB-C VBUS ----> BQ25887 ChargerBill of Materials
| Designator(s) | Qty. | Value / Part | LCSC Part # | Purchase Link | Approx. Cost |
|---|---|---|---|---|---|
| C1, C18–C21, C26–C30, C39 | 11 | 100 nF, 0402 | C1525 | LCSC | $1.00 |
| C9–C11 | 3 | 22 µF, 0805 | C129302 | LCSC | $2.00 |
| C3, C4, C6, C8, C12–C14 | 7 | 10 µF, 0402 | C7472949 | LCSC | $3.00 |
| C15 | 1 | 2.2 µF, 0402 | C77002 | LCSC | $0.50 |
| C16, C17 | 2 | 22 µF, 0805 | C129302 | LCSC | $1.50 |
| C2 | 1 | 47 µF, 0805 | C76636 | LCSC | $1.50 |
| C22, C24 | 2 | 100 µF, 1210 | C90143 | LCSC | $3.00 |
| C25 | 1 | 2.2 µF, 0402 | C77002 | LCSC | $0.50 |
| C5, C31–C34 | 5 | 1 µF, 0402 | C52923 | LCSC | $1.50 |
| C35, C36 | 2 | 6.8 pF, 0402 | C6376026 | LCSC | $0.50 |
| C37, C38 | 2 | 22 pF, 0402 | C1555 | LCSC | $0.50 |
| C7 | 1 | 47 µF, 0805 | C76636 | LCSC | $1.50 |
| CARD1 | 1 | DM3C-SF microSD socket | C3177034 | LCSC | $3.00 |
| D1 | 1 | Green LED, 0402 | C130723 | LCSC | $0.50 |
| J1, J3 | 2 | PH2.54 2×3-pin headers | C42431837 | LCSC | $2.00 |
| J2 | 1 | XY308 three-pin terminal block | C557686 | LCSC | $2.00 |
| L1 | 1 | 1 µH power inductor | C285919 | LCSC | $2.00 |
| L2 | 1 | 1.5 µH power inductor | C5289323 | LCSC | $3.00 |
| L3 | 1 | 5.6 µH inductor | C5809216 | LCSC | $2.00 |
| L4 | 1 | FCM1608KF-601T03 ferrite bead | C141723 | LCSC | $1.00 |
| R1, R2 | 2 | 5.1 kΩ, 0402 | C25905 | LCSC | $1.00 |
| R10 | 1 | 5.1 kΩ, 0402 | C25905 | LCSC | $0.50 |
| R11 | 1 | 390 Ω, 0402 | C25109 | LCSC | $0.50 |
| R12 | 1 | 22 Ω, 1 W balancing resistor | C3921908 | LCSC | $2.00 |
| R4–R6, R8, R13–R15, R18–R24 | 14 | 10 kΩ, 0402 | C25744 | LCSC | $3.00 |
| R16 | 1 | 22 kΩ, 0402 | C25768 | LCSC | $0.50 |
| R17 | 1 | 100 kΩ, 0402 | C25741 | LCSC | $0.50 |
| R3 | 1 | 2.2 kΩ, 0402 | C25879 | LCSC | $0.50 |
| R7 | 1 | 300 Ω, 0402 | C25102 | LCSC | $0.50 |
| R9 | 1 | 30.1 kΩ precision resistor | C5842805 | LCSC | $1.00 |
| SW1, SW2 | 2 | TS-1088-AR02016 buttons | C720477 | LCSC | $2.00 |
| U1 | 1 | TPS63070RNMR buck-boost converter | C109322 | LCSC | $5.00 |
| U3 | 1 | ICM-20948 motion sensor | C726001 | LCSC | $18.00 |
| U4 | 1 | BME280 environmental sensor | C92489 | LCSC | $8.00 |
| U5 | 1 | BQ25887RGET battery charger | C2862617 | LCSC | $9.00 |
| U6 | 1 | LMR51430XDDCR buck converter | C5185863 | LCSC | $3.00 |
| U7 | 1 | STM32F722RET6 microcontroller | C118207 | LCSC | $18.00 |
| USB1 | 1 | 16-pin USB Type-C connector | C2765186 | LCSC | $3.00 |
| X1 | 1 | X322525MOB4SI crystal | C9006 | LCSC | $2.00 |
| X2 | 1 | Q13FC1350000400 crystal | C32346 | LCSC | $2.00 |
| Estimated component subtotal | $112.50 | ||||
| Shipping, taxes and price-change buffer | $11.50 | ||||
| Estimated total budget | $124.00 |
Prices are intentionally conservative estimates and may differ from the final LCSC cart because of stock changes, minimum-order quantities, taxes and shipping.
How To Make It Yourself
- Run
lcsc.pyso the libraries resolve. - Open the .kicad_pro file in KiCad.
- Export gerbers/drill/pick-and-place and send to JLCPCB for a quote.
- Generate a BOM and assemble with a stencil, paste, and reflow.
- Power up: 2S LIPO pack on the battery pad,
J2. - Flash: hold
SW2, reset withSW1, flash overUSB1.
Note for shippers: The gerber is SimpleFlightController.zip in the production folder with the bom.csv
Parts
82| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10k | Resistor_SMD:R_0201_0603Metric | R4, R5, R6, R13, R14, R15, R18, R19, R20, R21, R22, R23, R24 |
| 11 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C18, C19, C20, C21, C26, C27, C28, C29, C30, C39 |
| 7 | 10uF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C6, C8, C12, C13, C14 |
| 4 | 1uF | Capacitor_SMD:C_0402_1005Metric | C31, C32, C33, C34 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric | C9, C10, C11 |
| 2 | 100uF | Capacitor_SMD:C_0402_1005Metric | C22, C24 |
| 2 | 20pF | Capacitor_SMD:C_0402_1005Metric | C37, C38 |
| 2 | 22μF | Capacitor_SMD:C_0805_2012Metric | C16, C17 |
| 2 | 5.1K | Resistor_SMD:R_0201_0603Metric | R1, R2 |
| 2 | 6.8pF | Capacitor_SMD:C_0402_1005Metric | C35, C36 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J1, J3 |
| 2 | TS-1088-AR02016 | easyeda2kicad:SW-SMD_L3.9-W3.0-P4.45 | SW1, SW2 |
| 1 | 1.5μH | Inductor_SMD:L_APV_ANR4012 | L2 |
| 1 | 100k | Resistor_SMD:R_0201_0603Metric | R17 |
| 1 | 10K | Resistor_SMD:R_0201_0603Metric | R8 |
| 1 | 1uf | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | 1μH | Inductor_SMD:L_1008_2520Metric | L1 |
| 1 | 2.2k | Resistor_SMD:R_0201_0603Metric | R3 |
| 1 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C25 |
| 1 | 2.2μF | Capacitor_SMD:C_0402_1005Metric | C15 |
| 1 | 22.1k | Resistor_SMD:R_0201_0603Metric | R16 |
| 1 | 30.1k | Resistor_SMD:R_0201_0603Metric | R9 |
| 1 | 300 | Resistor_SMD:R_0201_0603Metric | R7 |
| 1 | 383 | Resistor_SMD:R_0201_0603Metric | R11 |
| 1 | 44uF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 47uF | Capacitor_SMD:C_0805_2012Metric | C7 |
| 1 | 5.23k | Resistor_SMD:R_0201_0603Metric | R10 |
| 1 | 5.6μH | Inductor_SMD:L_1210_3225Metric | L3 |
| 1 | BME280 | easyeda2kicad:LGA-8_BME280_BL | U4 |
| 1 | BQ25887RGET | easyeda2kicad:VQFN-24_L4.0-W4.0-P0.50-TL-EP2.7 | U5 |
| 1 | DM3C-SF | easyeda2kicad:TF-SMD_DM3CS-SF | CARD1 |
| 1 | FCM1608KF-601T03 | easyeda2kicad:L0603 | L4 |
| 1 | ICM-20948 | easyeda2kicad:QFN-24_L3.0-W3.0-P0.40-BL-EP | U3 |
| 1 | LED | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | LMR51430XDDCR | easyeda2kicad:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | U6 |
| 1 | Q13FC1350000400 | easyeda2kicad:FC-135R_L3.2-W1.5 | X2 |
| 1 | RCBSET | Resistor_SMD:R_0201_0603Metric | R12 |
| 1 | STM32F722RETx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U7 |
| 1 | Screw_Terminal_01x03 | TerminalBlock:TerminalBlock_Xinya_XY308-2.54-3P_1x03_P2.54mm_Horizontal | J2 |
| 1 | TPS63070RNMR | easyeda2kicad:VQFN-15_L3.0-W2.5-P0.50-BL | U1 |
| 1 | TYPE-C 16PIN 2MD | easyeda2kicad:USB-C-SMD_TYPE-C-16PIN-2MD-073 | USB1 |
| 1 | X322525MOB4SI | easyeda2kicad:CRYSTAL-SMD_4P-L3.2-W2.5-BL | X1 |
Questions
How big is the SimpleFlightController PCB?
It measures 50 × 55 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SimpleFlightController use?
82 parts, built around the BME280, TPS63070RNMR, DM3C-SF and ICM-20948. 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 SimpleFlightController KiCad files?
From the Ningheim/Pathfinder repository on GitHub, at the commit this page was made from: the board is hardware/SimpleFlightController.kicad_pcb and its schematic hardware/SimpleFlightController.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SimpleFlightController design in my own project?
Its repository states no licence, so its author keeps all rights: ask Ningheim before reusing the design.
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