HardLabs

Fourbyfour

nezumee·4x4·pcb/fourbyfour/fourbyfour.kicad_pcb

Fourbyfour PCB layout, top view — open source board by nezumee

About the Fourbyfour PCB

Fourbyfour is an open source PCB design by nezumee, published on GitHub under the MIT license. It is a 2-layer board measuring 76.2 × 76.2 mm, with 52 components from 5 distinct parts.

By type, the board carries 16 switches, 16 LEDs and 16 diodes.

It belongs with the keyboards designs in this gallery.

From the project

The 4x4 keyboard is a modular keyboard with per-key RGB lighting intended to be used as a base for prototyping MIDI controller with QMK firmware.

The 4x4 keyboard is a modular keyboard with per-key RGB lighting intended to be used as a base for prototyping MIDI controller with QMK firmware.

It consists of the following parts: Head PCB with MCU and other connectors 1 to 4 key PCB, each having 16 hotswap Cherry MX switches in 4x4 layout

These parts can be soldered together in different configurations, resulting in different layouts, such as 4x12 Planck layout or 8x8 layout similar to MIDI drumpads controllers.

Fourbyfour, from the project README
From the project README

Fourbyfour bill of materials (BOM)

52 components, 5 distinct parts.

QtyPartRefs
2
Conn_01x19
JB1, JL1
2
Conn_01x19
JR1, JT1
16
SW_PUSH
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +8
16
YS-SK6812MINI-E
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +8
16
D
D1, D2, D3, D4, D5, D6, D7, D8 +8

Fourbyfour design files

The KiCad project lives in the nezumee/4x4 repository on GitHub; these links point at the commit this page was built from.

Fourbyfour: common questions

How big is the Fourbyfour PCB?

The Fourbyfour measures 76.2 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fourbyfour?

52 components, from 5 distinct parts. The full bill of materials is listed on this page.

Where can I download the Fourbyfour design files?

From the nezumee/4x4 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Fourbyfour design in my own project?

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

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