2 layers73.2 × 59.4 mm 3x3, the printed circuit board in 3D

3x3

Minimal Layout, Maximum Efficiency — A collection of macro keyboard to boost your productivity without crowding your workspace.

Full screen GitHub .kicad_pcb

Size: 73.2 × 59.4 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 10
Nets: 18
Pads: 83
Tracks, vias: 74, 18
Pours: 1
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 14 Nov 2024
Updated: 2 Jul 2025

Overview

3x3 is an open-source printed circuit board by ImSeanConroy, from the ImSeanConroy/macro-keyboard repository on GitHub, published under the MIT licence. It is a 2-layer board of 73.2 × 59.4 mm with 10 parts on 18 nets, routed with 74 tracks and 18 vias.

Its parts include 9 switches and 1 IC. It belongs with the keyboards and input boards and the SAM D and SAM boards of this library.

README

README.md

Minimal Layout, Maximum Efficiency

A collection of macro keyboards to boost your productivity without crowding your workspace.

Project Image

Features and Development Roadmap

This project is considered complete for the time being, the following outlines the current features and potential future improvements:

Current Features

Compact Design: Space-saving with minimal desk footprint.
Customizable Macros: Assign any key functions to match your workflow.
Layout Variations: Supports various configurations (e.g., 1x1, 1x2, 1x4, 2x4, and 3x3).

Future Improvements

OLED Display: Add and test the inclusion of an OLED display.
Bluetooth Functionality: Add and test wireless connectivity.
Custom PCB Design: Move away from prebuilt Seeed Studio development boards. (A previous attempt was made, but limited electronics knowledge made debugging and identifying issues difficult.)

Getting Started

Open the Project - Open the .kicad_pro file in KiCad to view the project.
Review the Design - Inspect the schematic and PCB layout to ensure it meets your needs.
Customize or Export - Make any modifications and export the Gerber files for fabrication.
Order the PCB - Submit the Gerber files to your preferred PCB manufacturer.
Get the Components - Purchase the components from the BOM and a compatible board.
3D Print the Case - Download the STL files for your chosen configuration and print them on a 3D printer.
Assemble the Hardware - Solder the components and assemble the board and case.
Upload the Firmware - Connect the board via USB and upload the firmware.

Required Components

The following are the required components to build any of the macro keyboards:

Quantity	Component	Description	Source
1	Seeed XIAO SAMD21	Microcontroller board	PiHut
12	Kailh Mechanical Key Switches	Tactile switches	PiHut
20	Kailh Switch Sockets	For hot-swapping switches	PiHut
12	White DSA Keycaps	Keycap set	PiHut
12	Orange DSA Keycaps	Keycap set	PiHut
10	Neon Green DSA Keycaps	Keycap set	PiHut

Contributing

Contributions are welcome. Please open an issue or submit a pull request for any enhancements or bug fixes.

License

This project is Distributed under the MIT License - see the LICENSE file for information.

Support

If you are having problems, please let me know by raising a new issue.

Acknowledgments

This project was made possible thanks to the following resources:

Masterzen's Blog - Designing a keyboard from scratch
Keyboard Designer Wiki - PCB Designer Guide
Seeed Studio Wiki - Getting Started with Seeed Studio XIAO SAMD21

Category and platform

Keyboards and input SAM D and SAM

Topics

electronics kicad macro-keyboard keyboard

Project files

Show this board on your page

https://pcbkit.io/boards/ImSeanConroy/macro-keyboard

The board's own page, for a message or a post.

Source

Repository: ImSeanConroy/macro-keyboard
Board file: PCB/3x3/3x3.kicad_pcb
Commit: b5c4869
Licence: MIT
Copies: 2 copies in 1 repository

Parts

Qty	Value	Footprint	References
9	SW_Push	MX_Only:MXOnly-1U-Hotswap	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9
1	SeeeduinoXIAO	Seeeduino XIAO KICAD:Seeeduino XIAO-MOUDLE14P-2.54-21X17.8MM	U2

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Questions

How big is the 3x3 PCB?

It measures 73.2 × 59.4 mm and has 2 copper layers, 1.6 mm thick.

What parts does the 3x3 use?

10 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the 3x3 KiCad files?

From the ImSeanConroy/macro-keyboard repository on GitHub, at the commit this page was made from: the board is PCB/3x3/3x3.kicad_pcb and its schematic PCB/1x1/1x1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the 3x3 design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).