HardLabs

Keeb

cyao1234·keeb·hardware/keychron-clone.kicad_pcb

Keeb PCB layout, top view — open source STM32 board by cyao1234

About the Keeb PCB

Keeb is an open source STM32 PCB design by cyao1234, published on GitHub. It is a 2-layer board measuring 304.8 × 114.3 mm, with 184 components from 16 distinct parts.

Its main chip is the STM32L432KBUX, from the STM32 family. Other key parts include the XC6206PXXXMR and SRV05-4. By type, the board carries 88 switches, 84 diodes, 6 capacitors, 3 ICs, 2 resistors and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

A clone of the keycheron K2 keyboard. Compatible with all operating systems from Mac to Android to Windows. Hot-swappable allows to customize the typing experience without soldering, just pop them in and it’s done. The socket is compatible with almost all the MX style switches.

A clone of the keycheron K2 keyboard. Compatible with all operating systems from Mac to Android to Windows. Hot-swappable allows to customize the typing experience without soldering, just pop them in and it’s done. The socket is compatible with almost all the MX style switches.

This keyboard is a tactile mechanical keyboard with convenient access to all the essential function keys and a super slim form.

Keeb, from the project README
From the project README

Main components on the Keeb

STM32L432KBUXXC6206PXXXMRSRV05-4

Keeb bill of materials (BOM)

184 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32L432KBUX
STM32L432KBUx
U1
1
XC6206PXXXMR
XC6206PxxxMR
U2
1
SRV05-4
U3
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J1
1
MX_stab
S1
2
MX_stab
S2, S3
1
MX_stab
S4
77
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +69
2
SW_Push
SW32, SW45
2
SW_Push
SW47, SW72
3
SW_Push
SW75, SW76, SW77
84
C435829
D
D1, D2, D3, D4, D5, D6, D7, D8 +76
2
10UF
10uF
C1, C2
3
100NF
100nF
C3, C4, C5
1
4.7UF
4.7uF
C6
2
5.1K
5.1k
R1, R2

Keeb design files

The KiCad project lives in the cyao1234/keeb repository on GitHub; these links point at the commit this page was built from.

Keeb: common questions

What microcontroller does the Keeb use?

The Keeb is built around the STM32L432KBUX, from the STM32 family.

How big is the Keeb PCB?

The Keeb measures 304.8 × 114.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keeb?

184 components, from 16 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 Keeb design files?

From the cyao1234/keeb 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 Keeb design in my own project?

The repository has no license, so all rights stay with cyao1234. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Keeb 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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