Keyboard Builders' Digest
Keyboard Builders' Digest / Projects


Superkelp's first attempt at a PCB & case design – an open-source macropad.

Set out to design a little macropad from scratch earlier this year. The PCB came from JLCPCB and the sandwich case was cut at SendCutSend. The brass knob was turned by me. I soldered some white neopixels upside-down to control the per-key lighting; other than that, it's a bog-standard PCB design with an Alps encoder.

Adding the texture to the side of the knob is called knurling; there are specific tools you can use on a lathe to do it.


Size and volume are going to be your key factors. The PCB's for this project were only $2 for 5x with $15 shipping to Los Angeles. The case parts were largely inexpensive; I paid $50 for the lot. The acrylic layer was the most expensive at 20 bucks.

The most difficult part?

The most difficult part by far was the USB port cutout. It became a 2 set-up job on a 3-axis mill because I had to machine into the baseplate (need to find a lower clearance port to solder on). The upside-down LED's were also pretty shitty to solder.

PCB repo on GitHub.

Published on Fri 10th Sep 2021. Featured in KBD #43 (source).


Memphis 25

The Memphis 25 is a macropad by nickkallen with integrated SpaceMouse and USB hub (GH thread).

A 112-key macropad

The The ultimate macropad or G(igantic)FO with relgendable keycaps and MX style switches. Spotted by Technofrikus.

Keypatch by Genest Technologies

The Keypatch AT is an IBM Model F addon from the '80s by Genes Technologies. Presented by LGR (video).

Spacepad Micro

The Spacepad Micro is a tiny functional macropad by SouthPawEngineer.


KMO - an input pass-through and macropad

KMO by sango_gg, a companion for your keyboard, acts as an input pass-through and macropad.


Lunakey project

The [x|Lunakey project] includes two open-source split keyboards and a macropad published by Yoichiro Tanaka.