HardLabs

Monitor

rcls·monitor

Monitor PCB layout, top view — open source STM32 board by rcls

About the Monitor PCB

Monitor is an open source STM32 PCB design by rcls, published on GitHub. It is a 4-layer board measuring 35.5 × 33.7 mm, with 61 components from 30 distinct parts.

Its main chip is the STM32U031K8Ux, from the STM32 family. Other key parts include the TPSM365R6V3RDNR, LM27761 and FXLS8971CF. By type, the board carries 29 capacitors, 24 resistors, 4 ICs, 3 diodes and 1 crystal.

Main components on the Monitor

STM32U031K8UxTPSM365R6V3RDNRLM27761FXLS8971CF

Monitor bill of materials (BOM)

61 components, 30 distinct parts.

QtyPartRefs
1
STM32U031K8Ux
U1
1
TPSM365R6V3RDNR
U3
1
LM27761
U4
1
FXLS8971CF
U7
1
32768Hz
Y1
1
White
D1
1
BAV70
D2
1
1N5819
D3
10
1u
C1, C2, C3, C33, C42, C51, C53, C54 +2
8
0u1
C4, C5, C11, C12, C13, C32, C34, C57
2
10u
C14, C55
2
22p
C16, C17
1
4u7
C31
1
100u
C35
4
4u7
C41, C43, C44, C52
1
100p
C61
1
1k
R2
3
100k
R3, R8, R52
2
200k
R4, R7
2
39k
R5, R6
Show 10 more
QtyPartRefs
2
10
R9, R43
2
1
R11, R55
1
10k
R12
1
200k
R41
1
510k
R42
1
220k
R51
1
330k
R53
1
22k
R54
5
100
R61, R62, R63, R64, R65
1
1k
R66

Monitor design files

The KiCad project lives in the rcls/monitor repository on GitHub; these links point at the commit this page was built from.

Monitor: common questions

What microcontroller does the Monitor use?

The Monitor is built around the STM32U031K8Ux, from the STM32 family.

How big is the Monitor PCB?

The Monitor measures 35.5 × 33.7 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Monitor?

61 components, from 30 distinct parts. The full bill of materials is listed on this page.

Where can I download the Monitor design files?

From the rcls/monitor repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Monitor design in my own project?

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

Can I test firmware for the Monitor 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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