HardLabs

Corne

DaneEvans·Gecko-keyboard·pcbs/corne-chocolate/hotswap/corne-chocolate.kicad_pcb

Corne PCB layout, top view — open source RP2040/RP2350 board by DaneEvans
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About the Corne PCB

Corne is an open source RP2040/RP2350 PCB design by DaneEvans, published on GitHub under the CC-BY-4.0 license. It is a 2-layer board measuring 33.4 × 4.4 mm, with 190 components from 54 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117LPST33T3G, TPD4E05U06DQAR and W25Q128JVSIQ. By type, the board carries 23 switches, 22 LEDs, 16 capacitors, 9 resistors, 4 ICs and 4 connectors.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

Gecko split keyboard

Adding several small thumbwheels, as full size encoders are too big.

The Gecko uses CRKBD as a base, Add a few extra keys to the bottom row, useful for mute / sleep etc, and find space one or more small wheel encoder.

PCBA - 2x USB Sockets (TYPE-C-31-M-13C) - 2x audio sockets (PJ-398A-5A_PJ-399B-6A) - 4x Scroll wheel encoders (EC05E) (optional) - 46x LEDs (SK6812MINI-E) (optional) - 2x OLED displays (optional)

Main components on the Corne

RP2040NCP1117LPST33T3GTPD4E05U06DQARW25Q128JVSIQ

Corne bill of materials (BOM)

190 components, 54 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040
U1
1
NCP1117LPST33T3G
U2
1
TPD4E05U06DQAR
U3
1
W25Q128JVSIQ
U4
1
C91749
12MHz 18pF
Y1
1
TYPE-C-31-M-13C
J1
1
C128994
TRS
J2
1
Conn_01x04
J3
1
Conn_01x03
J4
4
Breakaway Tabs
BT1, BT2, BT3, BT4
25
YS-SK6812MINI-E
EXLED1, EXLED2, rEXLED1, rEXLED2, rLED1, rLED2, rLED3, rLED4 +17
1
SolderJumper_2_Bridged
JP1
4
RotaryEncoder
RE1, RE2, rRE1, rRE2
8
RotaryEncoder
RE1-2, RE1-3, RE2-2, RE2-3, rRE1-2, rRE1-3, rRE2-2, rRE2-3
4
TS-1088R-02026
SMDSW1, SMDSW2, rSMDSW1, rSMDSW2
1
C5333465
SW_Push
SW1
20
C5333465
SW_Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +12
2
SW_Push
SW22, SW23
2
RB521S30T1G
ZD1, rZD1
4
Breakaway Tabs
rBT1, rBT2, rBT3, rBT4
Show 34 more
QtyPartRefs
2
27P
27p
rC1, rC2
9
100N
100n
rC3, rC4, rC7, rC9, rC10, rC12, rC13, rC14 +1
3
1u
rC5, rC8, rC16
2
10U
10u
rC6, rC11
1
1N4148WT
rD1
1
TYPE-C-31-M-13C
rJ1
1
C128994
TRS
rJ2
1
Conn_01x03
rJ4
1
SolderJumper_2_Bridged
rJP1
2
5.1K
5.1k
rR1, rR2
2
1k
rR3, rR6
2
27
rR4, rR5
2
10K
10k
rR7, rR9
1
5.6K
5.6k
rR8
1
C5333465
SW_Push
rSW1
20
C5333465
SW_Push
rSW2, rSW3, rSW4, rSW5, rSW6, rSW7, rSW8, rSW9 +12
2
SW_Push
rSW22, rSW23
1
RP2040
rU1
1
NCP1117LPST33T3G
rU2
1
TPD4E05U06DQAR
rU3
1
W25Q128JVSIQ
rU4
1
C91749
12MHz 18pF
rY1
21
YS-SK6812MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +13
1
Conn_01x04
rJ3
1
1N4148WT
D1
2
27P
27p
C1, C2
9
100N
100n
C3, C4, C7, C9, C10, C12, C13, C14 +1
3
1u
C5, C8, C16
2
10U
10u
C6, C11
2
5.1K
5.1k
R1, R2
2
1k
R3, R6
2
27
R4, R5
2
10K
10k
R7, R9
1
5.6K
5.6k
R8

Corne design files

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

Corne: common questions

What microcontroller does the Corne use?

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

How big is the Corne PCB?

The Corne measures 33.4 × 4.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Corne?

190 components, from 54 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 design files?

From the DaneEvans/Gecko-keyboard 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 Corne design in my own project?

Yes, under the terms of its CC-BY-4.0 license, which DaneEvans chose for the repository.

Can I test firmware for the Corne 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.

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