HardLabs

Splitkb

NoseFa·splitkb·KICAD/splitkb/splitkb.kicad_pcb

Splitkb PCB layout, top view — open source Nordic nRF board by NoseFa
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About the Splitkb PCB

Splitkb is an open source Nordic nRF PCB design by NoseFa, published on GitHub under the MIT license. It is a 2-layer board measuring 250.6 × 125.7 mm, with 150 components from 3 distinct parts.

Its main chip is the NRF52840, from the Nordic nRF family. By type, the board carries 74 switches, 74 diodes and 2 ICs.

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

From the project

A wireless split low-profile keyboard with a nordic layout

A split low-profile wireless keyboard with a nordic ISO layout. I used the Caldera Keyboard by Christian Selig as inspiration and it clearly shows in the design. Still the keyboard uses a nice!nano like microcontroller based on the same NRF52840, ZMK as the firmware and a custom pcb with Choc V1 hotswap sockets. The keyboard also has an ortholinear layout which can be more ergonomic for some users.

Splitkb, from the project README
From the project README

Main components on the Splitkb

NRF52840

Splitkb bill of materials (BOM)

150 components, 3 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
NRF52840
U1, U2
74
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +66
74
D
D1, D2, D3, D4, D5, D6, D7, D8 +66

Splitkb design files

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

Splitkb: common questions

What microcontroller does the Splitkb use?

The Splitkb is built around the NRF52840, from the Nordic nRF family.

How big is the Splitkb PCB?

The Splitkb measures 250.6 × 125.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Splitkb?

150 components, from 3 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 Splitkb design files?

From the NoseFa/splitkb 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 Splitkb design in my own project?

Yes, under the terms of its MIT license, which NoseFa chose for the repository.

Can I test firmware for the Splitkb without the hardware?

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

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