Cornia

Vaarai·Cornia·PCB/cornia.kicad_pcb

About the Cornia PCB

Cornia is an open source RP2040/RP2350 PCB design by Vaarai, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 159.3 × 104.6 mm, with 55 components from 9 distinct parts.

Its main chip is the RP2040-ProMicro, from the RP2040/RP2350 family. Other key parts include the TRRS. By type, the board carries 21 switches, 21 inductors, 6 resistors, 2 ICs, 1 connector and 1 LED.

It belongs with the keyboards designs in this gallery.

From the project

Cornia is a split keyboard with 3x6 column strongly staggered keys and 3 thumb keys

This KiCad project is designed for the Cornia keyboard PCB

- cornia.kicadpro: This is the main project file for KiCad. It contains general information about the project, such as library paths, and links to schematic and PCB files. - cornia.sch: This file defines the circuit diagram and component connections. - cornia.kicadpcb: This file contains the PCB layout, including component placement, routing, and layer definitions. - cornia.kicadsym: This file defines the symbol for a custom component used in the schematics. - cornia.kicadmod: This file defines the footprint for a custom component…

Main components on the Cornia

RP2040-ProMicro TRRS

Cornia bill of materials (BOM)

55 components, 9 distinct parts.

Qty	Part	Footprint	Refs
1	RP2040-ProMicro	RP2040-ProMicro	U1
1	TRRS	TRRS_PJ-320A	U2
1	Conn_01x01_Pin	1Pin	J1
2	SW_RST	SW_SMD_4x4mm	RST_L1, RST_R1
21	SW_Push	keyswitch_cherrymx_hotswap_reversible_1u	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +13
1	OLED	OLED	OL1
21	SK6812MINI	YS-SK6812MINI-E	L1, L2, L3, L4, L5, L6, L7, L8 +13
1	1uF	C_0805	C1
6	2.2k	R_0805	R1, R2, R3, R4, R5, R6

Cornia design files

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

LayoutPCB/cornia.kicad_pcb
SchematicPCB/cornia.kicad_sch

Cornia: common questions

What microcontroller does the Cornia use?

The Cornia is built around the RP2040-ProMicro, from the RP2040/RP2350 family.

How big is the Cornia PCB?

The Cornia measures 159.3 × 104.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cornia?

55 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cornia design files?

From the Vaarai/Cornia repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Cornia design in my own project?

Yes, under the terms of its GPL-2.0 license, which Vaarai chose for the repository.

Can I test firmware for the Cornia 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.