HardLabs

Cute-Cat-Split-Keeb

adonutartist·Cute-Cat-Split-Keeb·kicad/kicad.kicad_pcb

Cute-Cat-Split-Keeb PCB layout, top view — open source Nordic nRF board by adonutartist
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About the Cute-Cat-Split-Keeb PCB

Cute-Cat-Split-Keeb is an open source Nordic nRF PCB design by adonutartist, published on GitHub. It is a 2-layer board measuring 352.5 × 100 mm, with 216 components from 12 distinct parts.

Its main chip is the MCP23017x-x-SS, from the Nordic nRF family. Other key parts include the XIAO-nRF52840-SMD. By type, the board carries 138 diodes, 69 switches, 4 ICs and 4 resistors.

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

From the project

Yin Yang cute Cat keeb tht can also split :3

A wireless split mechanical keyboard with per key kalih hotswap sockets, per key underglow RGB, a slide potentiometer for brightness control on the right half, and a rotary encoder for volume control on the left half. Uses a sandwich mount case (bottom case + plate + top frame) held together with heatset inserts and m2 20mm screws. The CAD features a unique design so it can join up to change into a full keeb visually. A project by Nemo made for Forge YSWS by Hackclub.

Cute-Cat-Split-Keeb, from the project README
From the project README

Main components on the Cute-Cat-Split-Keeb

MCP23017x-x-SSXIAO-nRF52840-SMD

Cute-Cat-Split-Keeb bill of materials (BOM)

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

QtyPartRefs
2
MCP23017x-x-SS
U1, U3
2
XIAO-nRF52840-SMD
U2, U4
1
R_Potentiometer
RV1
1
RotaryEncoder_Switch
SW1
60
SW_Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +52
4
SW_Push
SW34, SW37, SW66, SW67
2
SW_Push
SW35, SW69
2
SW_Push
SW36, SW68
68
1N914
D1, D2, D3, D4, D5, D6, D7, D8 +60
70
SK6812MINI-E
D37, D38, D39, D40, D41, D42, D43, D44 +62
2
806k
R1, R3
2
1M
R2, R4

Cute-Cat-Split-Keeb design files

The KiCad project lives in the adonutartist/Cute-Cat-Split-Keeb repository on GitHub; these links point at the commit this page was built from.

Cute-Cat-Split-Keeb: common questions

What microcontroller does the Cute-Cat-Split-Keeb use?

The Cute-Cat-Split-Keeb is built around the MCP23017x-x-SS, from the Nordic nRF family.

How big is the Cute-Cat-Split-Keeb PCB?

The Cute-Cat-Split-Keeb measures 352.5 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cute-Cat-Split-Keeb?

216 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 Cute-Cat-Split-Keeb design files?

From the adonutartist/Cute-Cat-Split-Keeb 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 Cute-Cat-Split-Keeb design in my own project?

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

Can I test firmware for the Cute-Cat-Split-Keeb 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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