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
4 layers40 × 60 mm
Proxima
LtBrain/proximaA TVC and fin control flight computer
- Size
- 40 × 60 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 74
- Nets
- 90
- Pads
- 288
- Tracks, vias
- 189, 28
- Pours
- 52
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Nov 2025
- Updated
- 30 Nov 2025
Overview
Proxima is an open-source printed circuit board by LtBrain, from the LtBrain/proxima repository on GitHub, published under the MIT licence. It is a 4-layer board of 40 × 60 mm with 74 parts on 90 nets, routed with 189 tracks and 28 vias.
It is built around the AP63205WU, BMM350 and BMP580, with the TF-01A, LSM6DSV16XTR and IRLML0030 among its other parts. Its parts include 27 capacitors, 16 resistors, 12 connectors, 6 ICs and 4 transistors. It belongs with the STM32 boards of this library.
Main components
10
AP63205WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.8V~32V 5V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
BMM350
WLCSP-9(1.3x1.3)-40℃~+85℃ 1.72V~1.98V 200uA I2C、SPI ±2mT ±2mT、- WLCSP-9(1.3x1.3) 3D Magnetic Sensors ROHSBosch SensortecSpecialized Sensors
BMP580
LGA-10(2x2)-40℃~+85℃ 0.5pa/K 1.73V~3.6V 30Kpa~1.25bar 5.5uA 6pa 75pa I2C、SPI、I3C LGA-10(2x2) Pressure Sensors ROHSBosch SensortecPressure Sensors
TF-01A
SMD1.85mm Connector and Ejector MicroSD Card (TF Card) Push-Push With Locating Pins SMD SD Card / Memory Card Connector ROHSHRO ElectronicsSD Card / Memory Card Connector
LSM6DSV16XTR
LGA-14-40℃~+85℃ 1.71V~3.6V 2.6uA 4.5KB IMU (accelerometer + gyroscope) SPI、I2C X,Y,Z X,Y,Z ±16g ±4000dps 运动事件检测、同步与时间戳 LGA-14(2.5x3) Accelerometers ROHSSTMicroelectronicsAccelerometers
IRLML0030
SOT-23-55℃~+150℃ 1 N-channel 2.3V 2.6nC 27mΩ@10V 30V 382pF 39pF 5.3A SOT-23 MOSFETs ROHSGuangdong HottechMOSFETs
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 TechQ13FC1350000400
SMD3215-2PSMD3215-2P Crystals ROHSSeiko EpsonCrystals
X322525MOB4SI
SMD3225-4P-40℃~+85℃ 12pF 25MHz 50Ω Crystal Oscillator ±10ppm ±20ppm SMD3225-4P Crystals ROHSYXCCrystals
README
README.mdproxima
A TVC and fin control flight computer
Parts
74| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100nF | A_HDJ_Library:C_0402_1005Metric | C1, C2, C3, C4, C5, C15, C17, C24, C25, C26, C27, C46 |
| 8 | 10K | A_HDJ_Library:R_0402_1005Metric | R3, R8, R9, R10, R11, R12, R13, R14 |
| 8 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1, J2, J3, J4, J5, J6, J7, J8 |
| 4 | 22uF | Capacitor_SMD:C_0805_2012Metric | C18, C19, C44, C45 |
| 4 | 470 Ohm | A_HDJ_Library:R_0402_1005Metric | R18, R19, R20, R21 |
| 4 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J9, J10, J11, J12 |
| 4 | IRLML0030 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 3 | 1uF | A_HDJ_Library:C_0402_1005Metric | C6, C7, C8 |
| 2 | 20pF | A_HDJ_Library:C_0402_1005Metric | C11, C12 |
| 2 | 5.1K | A_HDJ_Library:R_0402_1005Metric | R1, R2 |
| 2 | 6.8pF | A_HDJ_Library:C_0402_1005Metric | C13, C14 |
| 2 | TS-1088-AR02016 | easyeda2kicad:SW-SMD_L3.9-W3.0-P4.45 | SW1, SW2 |
| 1 | 100K | A_HDJ_Library:R_0402_1005Metric | R16 |
| 1 | 10uF | A_HDJ_Library:C_0402_1005Metric | C9 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C16 |
| 1 | 2.2uF | A_HDJ_Library:C_0402_1005Metric | C10 |
| 1 | 2.2uF | Capacitor_SMD:C_0805_2012Metric | C43 |
| 1 | 22.1K | A_HDJ_Library:R_0402_1005Metric | R17 |
| 1 | 4.7uH | Inductor_SMD:L_Coilcraft_XxL4020 | L1 |
| 1 | 5.6uH | Inductor_SMD:L_Coilcraft_XxL4020 | L3 |
| 1 | AP63205WU | Package_TO_SOT_SMD:TSOT-23-6 | U4 |
| 1 | BMM350 | BMM350 (1):BGA9C40P3X3_128X128X50 | U7 |
| 1 | BMP580 | easyeda2kicad:LGA-10_L2.0-W2.0-P0.50-TL_BMP580 | U2 |
| 1 | FCM1608KF-601T03 | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | LMR51430XFDDCR | LMR51430:SOT-23-THIN-6_DDC_TEX | U5 |
| 1 | LSM6DSV16XTR | LSM6DSV16XTR:XDCR_LSM6DSV16XTR | U3 |
| 1 | Q13FC1350000400 | easyeda2kicad:FC-135R_L3.2-W1.5 | X1 |
| 1 | STM32F722RETx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U1 |
| 1 | TF-01A | easyeda2kicad:TF-SMD_TF-01A | Card1 |
| 1 | TYPE-C 16PIN 2MD(073) | easyeda2kicad:USB-C-SMD_TYPE-C-6PIN-2MD-073 | USB1 |
| 1 | X322525MOB4SI | easyeda2kicad:CRYSTAL-SMD_4P-L3.2-W2.5-BL | X2 |
Questions
How big is the Proxima PCB?
It measures 40 × 60 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Proxima use?
74 parts, built around the AP63205WU, BMM350, BMP580 and TF-01A. 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 Proxima KiCad files?
From the LtBrain/proxima repository on GitHub, at the commit this page was made from: the board is proxima/proxima.kicad_pcb and its schematic proxima/proxima.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Proxima design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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