HardLabs

Fin

Helios-Rocket·fin-strain-gauge·Hardware/fin/fin.kicad_pcb

Fin PCB layout, top view — open source STM32 board by Helios-Rocket

About the Fin PCB

Fin is an open source STM32 PCB design by Helios-Rocket, published on GitHub. It is a 2-layer board measuring 165.1 × 69.9 mm, with 43 components from 20 distinct parts.

Its main chip is the STM32L412K8Ux, from the STM32 family. Other key parts include the ADS131M03QPWRQ1, ADXL380-1BCCZ-RL7, W25N512GVEIG and TMP235A4DBZR. By type, the board carries 18 capacitors, 12 resistors, 6 ICs, 4 connectors, 2 diodes and 1 crystal.

Main components on the Fin

ADS131M03QPWRQ1ADXL380-1BCCZ-RL7W25N512GVEIGTMP235A4DBZRSTM32L412K8Ux

Fin bill of materials (BOM)

43 components, 20 distinct parts.

QtyPartRefs
1
ADS131M03QPWRQ1
U1
2
ADXL380-1BCCZ-RL7
U2, U6
1
W25N512GVEIG
U3
1
TMP235A4DBZR
U4
1
STM32L412K8Ux
U5
1
ECS-327TXO-33-TR
X1
1
Conn_01x10_Pin
J1
3
Conn_01x04_Pin
J2, J3, J5
2
LED
D1, D4
3
10 nF
C1, C3, C5
6
100nF
C2, C12, C13, C14, C15, C16
2
1 uF
C4, C10
1
220 nF
C11
4
0.1uF
C19, C20, C22, C23
2
1uF
C21, C24
1
10 k
R1
1
5K
R2
4
2.5 k
R3, R4, R5, R6
2
220
R7, R10
4
1 k
R11, R12, R13, R14

Fin design files

The KiCad project lives in the Helios-Rocket/fin-strain-gauge repository on GitHub; these links point at the commit this page was built from.

Fin: common questions

What microcontroller does the Fin use?

The Fin is built around the STM32L412K8Ux, from the STM32 family.

How big is the Fin PCB?

The Fin measures 165.1 × 69.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fin?

43 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fin design files?

From the Helios-Rocket/fin-strain-gauge repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Fin design in my own project?

The repository has no license, so all rights stay with Helios-Rocket. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Fin without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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