HardLabs

Corne Chocolate

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

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

About the Corne Chocolate PCB

Corne Chocolate is an open source AVR/Arduino PCB design by IndianBoy42, published on GitHub. It is a 2-layer board measuring 133.8 × 91.4 mm, with 84 components from 12 distinct parts.

Its main chip is the ATMEGA32U2-AU, from the AVR/Arduino family. By type, the board carries 27 inductors, 21 switches, 21 diodes, 8 jumpers, 3 connectors and 2 resistors.

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 Chocolate, from the project README
From the project README

Main components on the Corne Chocolate

ATMEGA32U2-AU

Corne Chocolate bill of materials (BOM)

84 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U2-AU
ProMicro
U1
1
LED
J3
2
i2c-pin
P1, P2
8
—
JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9
1
Reset
RSW1
20
SW_PUSH
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +12
1
SW_PUSH
SW21
21
SOD-123
D
D1, D2, D3, D4, D5, D6, D7, D8 +13
21
SK6812MINI
L1, L2, L3, L4, L5, L6, L7, L8 +13
6
SK6812MINI
L22, L23, L24, L25, L26, L27
1
10K
R
R1
1
R
R2

Corne Chocolate 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 Chocolate: common questions

What microcontroller does the Corne Chocolate use?

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

How big is the Corne Chocolate PCB?

The Corne Chocolate measures 133.8 × 91.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Corne Chocolate?

84 components, from 12 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 Chocolate 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 Chocolate 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 Chocolate 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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