HardLabs

Capybully

sporkus·capybully_keyboard·kicad/pcb/capybully.kicad_pcb

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

Capybully 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 257.2 × 89.2 mm, with 36 components from 14 distinct parts.

Its main chip is the STM32F072CBT6, from the STM32 family. Other key parts include the 74HC4051, XC6206PXXXMR-REGULATOR_LINEAR and OPA354. By type, the board carries 16 resistors, 14 capacitors, 5 ICs and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

Capactive sensing (EC) pcb for Bully keyboard

Open source capactive sensing pcb for Bully keyboard.

Capybully, from the project README
From the project README

Main components on the Capybully

STM32F072CBT674HC4051XC6206PXXXMR-REGULATOR_LINEAROPA354

Capybully bill of materials (BOM)

36 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F072CBT6
U1
2
74HC4051
U2, U3
1
XC6206PXXXMR-REGULATOR_LINEAR
XC6206PxxxMR-Regulator_Linear
U4
1
OPA354
U5
1
SM04B-SRSS-TB(LF)(SN)
J1
5
100NF
100nF
C1, C2, C3, C4, C10
4
100N
100n
C5, C9, C11, C12
1
10UF
10uF
C6
2
1UF
1uF
C7, C8
1
C1530
220pF NP0
C13
1
1u
C15
14
100K
100k
R1, R2, R4, R5, R6, R7, R8, R9 +6
1
10K
10k
R3
1
1k
R16

Capybully design files

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

Capybully: common questions

What microcontroller does the Capybully use?

The Capybully is built around the STM32F072CBT6, from the STM32 family.

How big is the Capybully PCB?

The Capybully measures 257.2 × 89.2 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Capybully?

36 components, from 14 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 Capybully design files?

From the sporkus/capybully_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 Capybully 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 Capybully 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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