LK56HS

lambdakb·keyboard-lk56hs·pcb/lk56hs-pcb.kicad_pcb

About the LK56HS PCB

LK56HS is an open source RP2040/RP2350 PCB design by lambdakb, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 247.7 × 95.3 mm, with 143 components from 9 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 78 switches, 60 diodes, 2 connectors, 2 capacitors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

LK56HS 55% Staggered Keyboard

[PCB Front]: output/pcb/img/lk56hs-pcb-top.svg [PCB Front PNG]: output/pcb/img/lk56hs-pcb-top.png [PCB Back]: output/pcb/img/lk56hs-pcb-bottom.svg [PCB Back PNG]: output/pcb/img/lk56hs-pcb-bottom.png

The PCB has been designed in KiCad EDA 9.0 using the kicad-lkbd libraries and kbplacer.

You can preview the project files using KiCanvas directly in your browser and download the latest fabrication files for JLCPCB from the latest release.

LK56HS, from the project README — From the project README

Main components on the LK56HS

RaspberryPi_Pico

LK56HS bill of materials (BOM)

143 components, 9 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RaspberryPi_Pico	MCU_RaspberryPi_Pico_THT	U1
1	PINHD_1x03_ARGB	PinHeader_1x03_THT_P2.54mm_nSilk	J2
1	PINHD_1x05_I2C	PinHeader_1x05_THT_P2.54mm_nSilk	J3
6	MX_stab	Stabilizer_MX_2U	S13, S38, S41, S53, S62, S64
1	MX_stab	Stabilizer_MX_6U	S63
1	C41430893 RotaryEncoder_Switch_MP	SW_MX_EC11_HotSwap_nSilk	SW1
70	SW_Push	SW_MX_HotSwap_nSilk	SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +62
60	C81598 D	Diode_SMD_SOD-123_inSilk	D1, D2, D3, D4, D5, D6, D7, D8 +52
2	100NF 100nF	Capacitor_SMD_1206_inSilk	C1, C2

LK56HS design files

The KiCad project lives in the lambdakb/keyboard-lk56hs repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/lk56hs-pcb.kicad_pcb
Schematicpcb/lk56hs-pcb.kicad_sch
BOMoutput/pcb/fabrication/jlcpcb/lk56hs-pcb_bom_jlcpcb.csv

LK56HS: common questions

What microcontroller does the LK56HS use?

The LK56HS is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the LK56HS PCB?

The LK56HS measures 247.7 × 95.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LK56HS?

143 components, from 9 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 LK56HS design files?

From the lambdakb/keyboard-lk56hs 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 LK56HS design in my own project?

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

Can I test firmware for the LK56HS without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.