LK16C

lambdakb·keyboard-lk16c·pcb/lk16c-pcb.kicad_pcb

About the LK16C PCB

LK16C 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 76.2 × 76.2 mm, with 38 components from 5 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 19 switches, 16 diodes, 2 connectors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

LK16C 4x4 Daisy-Chainable Keyboard PCB

[PCB Front]: output/pcb/img/lk16c-pcb-top.svg [PCB Front PNG]: output/pcb/img/lk16c-pcb-top.png [PCB Back]: output/pcb/img/lk16c-pcb-bottom.svg [PCB Back PNG]: output/pcb/img/lk16c-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.

Main components on the LK16C

RaspberryPi_Pico

LK16C bill of materials (BOM)

38 components, 5 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	J7
1	PINHD_1x05_I2C	PinHeader_1x05_THT_P2.54mm_nSilk	J8
19	SW_Push	SW_MX_Slim_HotSwap_THT_sqSilk	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +11
16	1N4148	Diode_SMD_SOD-123_inSilk	D1, D2, D3, D4, D5, D6, D7, D8 +8

LK16C design files

The KiCad project lives in the lambdakb/keyboard-lk16c repository on GitHub; these links point at the commit this page was built from.

Layoutpcb/lk16c-pcb.kicad_pcb
Schematicpcb/lk16c-pcb.kicad_sch
BOMoutput/pcb/fabrication/jlcpcb/lk16c-pcb_bom_jlcpcb.csv

LK16C: common questions

What microcontroller does the LK16C use?

The LK16C is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the LK16C PCB?

The LK16C measures 76.2 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LK16C?

38 components, from 5 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 LK16C design files?

From the lambdakb/keyboard-lk16c 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 LK16C 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 LK16C 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.