HardLabs

Corne Cherry

IndianBoy42·keyboard-pcbs·crkbd/corne-cherry/pcb/corne-cherry.kicad_pcb

Corne Cherry PCB layout, top view — open source AVR/Arduino board by IndianBoy42

About the Corne Cherry PCB

Corne Cherry is an open source AVR/Arduino PCB design by IndianBoy42, published on GitHub. It is a 2-layer board measuring 275.5 × 105.6 mm, with 146 components from 10 distinct parts.

Its main chip is the ATMEGA32U2-AU, from the AVR/Arduino family. Other key parts include the PRTR5V0U2X. By type, the board carries 54 LEDs, 42 switches, 42 diodes, 4 connectors and 2 ICs.

It belongs with the keyboards designs in this gallery.

From the project

Files for my keyboard PCBs, derived or original

The Corne keyboard is a split keyboard with 3x6 column staggered keys and 3 thumb keys, based on Helix. Crkbd stands for Corne Keyboard.

- corne-classic(JP/EN): Corne for Cherry MX switches - corne-cherry(JP) (tilting, JP): Hotswappable Corne for Cherry MX switches by kailh PCB sockets. - corne-chocolate(JP/EN): Hotswappable Corne for Chocolate switches using Kailh PCB hot-swap sockets. - corne-light(JP): Light-weight Corne (Easy build with a simple PCB).

Corne Cherry, from the project README
From the project README

Main components on the Corne Cherry

ATMEGA32U2-AUPRTR5V0U2X

Corne Cherry bill of materials (BOM)

146 components, 10 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U2-AU
ProMicro
U1
1
PRTR5V0U2X
ProMicro
U2
2
MJ-4PP-9
J1, J3
2
OLED
J2, J4
2
SW_PUSH
RSW1, RSW2
40
SW_PUSH
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +32
2
SW_PUSH
SW21, SW42
12
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED28, LED29 +4
42
YS-SK6812MINI-E
LED7, LED8, LED9, LED10, LED11, LED12, LED13, LED14 +34
42
SOD-123
D
D1, D2, D3, D4, D5, D6, D7, D8 +34

Corne Cherry design files

The KiCad project lives in the IndianBoy42/keyboard-pcbs repository on GitHub; these links point at the commit this page was built from.

Corne Cherry: common questions

What microcontroller does the Corne Cherry use?

The Corne Cherry is built around the ATMEGA32U2-AU, from the AVR/Arduino family.

How big is the Corne Cherry PCB?

The Corne Cherry measures 275.5 × 105.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Corne Cherry?

146 components, from 10 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 Corne Cherry design files?

From the IndianBoy42/keyboard-pcbs repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Corne Cherry design in my own project?

The repository has no license, so all rights stay with IndianBoy42. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Corne Cherry without the hardware?

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

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