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Le Capybara

sporkus·le_capybara_keyboard·kicad/pcb/le_capybara.kicad_pcb

Le Capybara PCB layout, top view — open source STM32 board by sporkus
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About the Le Capybara PCB

Le Capybara is an open source STM32 PCB design by sporkus, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 227.3 × 85 mm, with 64 components from 26 distinct parts.

Its main chip is the STM32F072CBT6, from the STM32 family. Other key parts include the XC6206PXXXMR-REGULATOR_LINEAR, PRTR5V0U2X, 74HC4051 and OPA354AIDBVR. By type, the board carries 17 capacitors, 17 resistors, 11 diodes, 8 switches, 6 ICs and 2 connectors.

It belongs with the keyboards designs in this gallery.

From the project

Capactive sensing (EC) pcb for Le Chiffre keyboard

Capacitive sensing (aka Topre) keyboard in Le Chiffre layout

Recommended plate material is 1.2mm steel. Plate files are in the expected physical dimensions. No kerf adjustments have been applied. The dxf files have been used successfully with SendCutSend and LaserBoost. JLCPCB is not recommnded for the plates without further testing to adapt to their milling process.

Le Capybara, from the project README
From the project README

Main components on the Le Capybara

XC6206PXXXMR-REGULATOR_LINEARSTM32F072CBT6PRTR5V0U2X74HC4051OPA354AIDBVR

Le Capybara bill of materials (BOM)

64 components, 26 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XC6206PXXXMR-REGULATOR_LINEAR
XC6206PxxxMR-Regulator_Linear
U1
1
STM32F072CBT6
U2
1
PRTR5V0U2X
U3
2
74HC4051
U4, U6
1
OPA354AIDBVR
U5
1
C3019717
USB_C sink board 1.3mm
J1
1
CONN_01X03_FEMALE
Conn_01x03_Female
J101
1
ASMD1206-150
F1
1
SOLDERJUMPER_3_OPEN
SolderJumper_3_Open
JP2
2
EC_SW
SW32, SW33
1
SW_Push
SW35
1
SKQGABE010
SW37
4
EC_SW
SW39, SW40, SW42, SW43
11
SK6812MINI
D101, D102, D103, D104, D105, D106, D107, D108 +3
1
C33600
60R@100MHz
MELED Industrial
L1
8
100NF
100nF
C1, C2, C3, C4, C9, C10, C12, C17
1
10UF
10uF
C5
2
1UF
1uF
C6, C7
4
100N
100n
C8, C13, C15, C16
1
1u
C11
Show 6 more
QtyPartRefs
1
220PF
220pF
C14
2
5.1K
5.1k
R1, R2
1
10K
10k
R3
2
4.7K
4.7k
R4, R5
11
100K
100k
R6, R7, R8, R9, R10, R11, R12, R13 +3
1
1k
R15

Le Capybara design files

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

Le Capybara: common questions

What microcontroller does the Le Capybara use?

The Le Capybara is built around the STM32F072CBT6, from the STM32 family.

How big is the Le Capybara PCB?

The Le Capybara measures 227.3 × 85 mm, has 4 copper layers and is 1.6062 mm thick.

How many components are on the Le Capybara?

64 components, from 26 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 Le Capybara design files?

From the sporkus/le_capybara_keyboard 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 Le Capybara design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which sporkus chose for the repository.

Can I test firmware for the Le Capybara 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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