colon3pad

This is a custom designed macro pad, created for the the Hackpad event. It has 16 keys and a built in OLED display.

Inspiration / Challenges:

I designed this so I could get more practice with designing PCBs in KiCad. The fact that I'm getting this hardware for free also gave me an excuse to work on it.

A challenge that I had was that I had to redo parts of the design several times. For example, I had finished the PCB when I realized that all the switches needed to be rotated 180°, so that forced me to reroute everything. Also, information on the PCB footprints and dimensions needed for the Choc V2 switches is somewhat scarce, so a ton of research was required.

BOM:

For PCB:

• 1x Seeed Studio XIAO RP2040
• 1x SSD1306 128x32 OLED
• 16x Kailh Choc V2 switches
• 16x SK6812-E reverse mount NeoPixel LEDs
• 16x 1N4148 diodes

For Case:

• Case is 3D printed with PLA
• 4x M3x12mm screws
• 4x M3 hex nuts
• 4x M3x5mx4mm heatset inserts
• 15x 1u low profile key caps (compatibility list)
• 1x 2u low profile key cap

License:

This project is licensed under the GNU GPL v3.

ading2210/colon3pad - A custom macro pad
Copyright (C) 2025 ading2210

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.