HardLabs

Cornel

hibiyasleep·cornelike·pcb/cornel.kicad_pcb

Cornel PCB layout, top view — open source AVR/Arduino board by hibiyasleep

About the Cornel PCB

Cornel is an open source AVR/Arduino PCB design by hibiyasleep, published on GitHub. It is a 2-layer board measuring 268.5 × 110.5 mm, with 182 components from 37 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. By type, the board carries 58 switches, 56 diodes, 54 LEDs, 4 connectors, 4 resistors and 2 ICs.

It belongs with the keyboards and iot & wireless designs in this gallery.

From the project

yet another Corne clone, but with 5 rows.

yet another Crkbd clone, but with 5 rows.

ignore this if you're brave enough, like, if you know what Kailh Choc is, then you are safe.

According to Crkbd, the Corne keyboard is:

Cornel is basically a clone of Corne keyboard, but with

Kailh Choc Switches but keeping cherry pitch (19mm) for V2 keycaps. Number Row: to provide easy transition to 40% layout. can be removed later if no longer required. (irreversible) Bluetooth MCU Support: Cornel provides battery board (discharge only) that fits onto MCU cover, might be able to power BLE Micro Pro, etc. Low Profile: Cornel might do any attempt…

Main components on the Cornel

ProMicro

Cornel bill of materials (BOM)

182 components, 37 distinct parts.

QtyPartRefs
2
ProMicro
U1, U2
2
EXT-OLED
J1, J3
2
AudioJack4
J2, J4
2
CR1632
BT1, BT2
2
0, 0
SW1, SW28
2
0, 1
SW2, SW29
2
0, 2
SW3, SW30
2
0, 3
SW4, SW31
2
0, 4
SW5, SW32
2
0, 5
SW6, SW33
2
1, 0
SW7, SW34
2
1, 1
SW8, SW35
2
1, 2
SW9, SW36
2
1, 3
SW10, SW37
2
1, 4
SW11, SW38
2
1, 5
SW12, SW39
2
2, 0
SW13, SW40
2
2, 1
SW14, SW41
2
2, 2
SW15, SW42
2
2, 3
SW16, SW43
Show 17 more
QtyPartRefs
2
2, 4
SW17, SW44
2
2, 5
SW18, SW45
2
3, 0
SW19, SW46
2
3, 1
SW20, SW47
2
3, 2
SW21, SW48
2
3, 3
SW22, SW49
2
3, 4
SW23, SW50
2
3, 5
SW24, SW51
2
4, 3
SW25, SW52
2
4, 4
SW26, SW53
2
4, 5
SW27, SW54
2
RST
SW101, SW201
2
BATT_EN
SW102, SW202
54
SK6812MINI
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +46
56
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +48
2
10u
C1, C2
4
3.3K
R1, R2, R3, R4

Cornel design files

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

Cornel: common questions

What microcontroller does the Cornel use?

The Cornel is built around the ProMicro, from the AVR/Arduino family.

How big is the Cornel PCB?

The Cornel measures 268.5 × 110.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cornel?

182 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the Cornel design files?

From the hibiyasleep/cornelike repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Cornel design in my own project?

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

Can I test firmware for the Cornel 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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