HardLabs

02-LINE

tuton-RCJ·2025PCB·2-KANTO/02-LINE/02-LINE.kicad_pcb

02-LINE PCB layout, top view — open source STM32 board by tuton-RCJ

About the 02-LINE PCB

02-LINE is an open source STM32 PCB design by tuton-RCJ, published on GitHub under the MIT license. It is a 2-layer board measuring 81 × 52 mm, with 74 components from 15 distinct parts.

Its main chip is the STM32F446RETX, from the STM32 family. By type, the board carries 35 resistors, 19 ICs, 10 capacitors, 7 diodes, 2 connectors and 1 inductor.

From the project

基板・回路のリポジトリです。

基板はすべてKiCAD7.0で設計し、JLCPCB様に発注しています。 1-TOKYOが東東京ノード大会で使用した基板です。 2-KANTOは関東ブロック大会で使用した基板です。 3-NAGOYAは名古屋全国大会で使用した基板です。

Main components on the 02-LINE

STM32F446RETX

02-LINE bill of materials (BOM)

74 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F446RETX
STM32F446RETx
U1
16
~
U2, U3, U4, U5, U6, U7, U8, U9 +8
2
~
U18, U19
1
WRITER CONN
J2
1
CONN_01X05
Conn_01x05
J3
1
C2297
LED_GREEN
D1
6
WS2812B
D2, D3, D4, D5, D6, D7
1
C1015
FerriteBead
FB1
7
100N
100n
C1, C3, C4, C5, C6, C8, C9
2
4.7U
4.7u
C2, C7
1
1u
C10
2
10K
10k
R1, R2
1
470
R3
16
120
R8, R9, R10, R11, R12, R13, R14, R15 +8
16
1k
R16, R17, R18, R19, R20, R21, R22, R23 +8

02-LINE design files

The KiCad project lives in the tuton-RCJ/2025PCB repository on GitHub; these links point at the commit this page was built from.

02-LINE: common questions

What microcontroller does the 02-LINE use?

The 02-LINE is built around the STM32F446RETX, from the STM32 family.

How big is the 02-LINE PCB?

The 02-LINE measures 81 × 52 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 02-LINE?

74 components, from 15 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the 02-LINE design files?

From the tuton-RCJ/2025PCB repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the 02-LINE design in my own project?

Yes, under the terms of its MIT license, which tuton-RCJ chose for the repository.

Can I test firmware for the 02-LINE 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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