HardLabs

ErgoDoxCustom

gennartan·ergodox-rp2350·hardware/electronic/ErgoDoxCustom.kicad_pcb

ErgoDoxCustom PCB layout, top view — open source RP2040/RP2350 board by gennartan

About the ErgoDoxCustom PCB

ErgoDoxCustom is an open source RP2040/RP2350 PCB design by gennartan, published on GitHub. It is a 2-layer board measuring 182.8 × 158.9 mm, with 119 components from 20 distinct parts.

Its main chip is the RP2350B-QFN80, from the RP2040/RP2350 family. Other key parts include the NCP1117-3.3_SOT223 and W25Q128JVS. By type, the board carries 47 resistors, 40 switches, 21 capacitors, 5 connectors, 3 ICs and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

An ergodox-like keyboard using RP2350

This folder contains the KiCad projects and production outputs for the electronic part of the ErgoDox Custom split keyboard.

The RP2350 is clearly overkill for a keyboard controller. It was chosen intentionally as part of the project goal: learning more about KiCad, PCB design, and electronic development in general, rather than optimizing for the simplest possible keyboard hardware.

Main components on the ErgoDoxCustom

RP2350B-QFN80NCP1117-3.3_SOT223W25Q128JVS

ErgoDoxCustom bill of materials (BOM)

119 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2350B-QFN80
U1
1
NCP1117-3.3_SOT223
U2
1
W25Q128JVS
U3
1
CRYSTAL_GND24
Crystal_GND24
Y1
2
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J1, J2
2
CONN_01X03_PIN
Conn_01x03_Pin
J3, J5
1
CONN_01X03_MOUNTINGPIN
Conn_01x03_MountingPin
J4
1
MECHANICAL
H99
2
SW_Push
SW1, SW2
38
SW_Push
SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10 +30
1
3.3U
3.3u
L1
4
4.7U
4.7u
C1, C2, C3, C16
2
10U
10u
C4, C5
13
100N
100n
C6, C7, C8, C9, C10, C11, C12, C13 +5
2
15P
15p
C20, C21
3
33
R1, R4, R5
2
5.1K
5.1k
R2, R3
1
0
R6
3
1k
R8, R9, R10
38
10K
10k
R11, R12, R13, R14, R15, R16, R17, R18 +30

ErgoDoxCustom design files

The KiCad project lives in the gennartan/ergodox-rp2350 repository on GitHub; these links point at the commit this page was built from.

ErgoDoxCustom: common questions

What microcontroller does the ErgoDoxCustom use?

The ErgoDoxCustom is built around the RP2350B-QFN80, from the RP2040/RP2350 family.

How big is the ErgoDoxCustom PCB?

The ErgoDoxCustom measures 182.8 × 158.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ErgoDoxCustom?

119 components, from 20 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 ErgoDoxCustom design files?

From the gennartan/ergodox-rp2350 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 ErgoDoxCustom design in my own project?

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

Can I test firmware for the ErgoDoxCustom 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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