2 layers80 × 62.5 mm Matyas s Hackpad, the printed circuit board in 3D

Matyas s Hackpad

My first own project, which includes a PCB and 3D printed components that I made.

Size: 80 × 62.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 27
Nets: 29
Pads: 104
Tracks, vias: 261, 33
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 19 Feb 2026
Updated: 14 Apr 2026

Overview

Matyas s Hackpad is an open-source printed circuit board by Matyas604, from the Matyas604/Matyas-s-Hackpad repository on GitHub, published under the MIT licence. It is a 2-layer board of 80 × 62.5 mm with 27 parts on 29 nets, routed with 261 tracks and 33 vias.

It is built around the SK6812MINI-E. Its parts include 15 diodes, 8 switches, 1 IC and 1 connector. It belongs with the keyboards and input boards of this library.

Main components

SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)

README

README.md

Matyas-s-Hackpad

It has 8 keys (7 switches + rotary encoder switch), a rotary encoder, and an OLED display. Each key is backlit with SK6812 MINI-E LEDs. It uses QMK firmware and VIA.

CAD Model:

Everything is connected by four M3x16mm screws and M3x5mx4mm heatset inserts. The case is printed in two parts, top and bottom.

Hackpad CAD

Made in Fusion360

PCB:

Schematic

Hackpad schematic

PCB

Hackpad PCB

Made in KiCad

Case:

Hackpad Case

Made in Fusion360

Firmware:

This Hackpad uses QMK firmware. Everything can be controlled in VIA. I have five layers set up, and I can assign anything to each one. I switch between them with a single switch. My layers are Main, Media, HA (shortcuts for Home Assistant), Game, and Other. I can also adjust the effects, speed, brightness, and backlight colors of LEDs directly from VIA. The OLED display shows the name of the current page.

VIA Keymap Configuration

VIA Underglow Lighting

Final result:

Hackpad Final

🎬 HACKPAD DEMO HERE 🎬

I really enjoyed designing and building the hackpad. It was the very first project I designed from start to finish. I learned how to use Fusion and create PCBs in KiCAD. There were a few mistakes in the model, but they weren’t that big. I made only one mistake during assembly: I soldered the rotary encoder on the other side of the board, and when I desoldered it, I snapped off a leg, but there were two in the kit, so it was fine. The programming was a bit difficult, but in the end, I managed to do what I wanted.

BOM:

Here is everything you need to create this Hackpad:

Component	Amount
Seeed XIAO RP2040	1x
MX-Style switches	7x
1N4148 Diodes	8x
EC11 Rotary encoder	1x
0.91 inch OLED display	1x
DSA keycaps	7x
SK6812 MINI-E LED	7x
M3x16mm screw	4x
M3x5mx4mm heatset insert	4x
Case (2 printed parts)	1x
PCB	1x

Made with ❤️ by @Matyas604

Category and platform

Keyboards and input

Topics

3d-printed custom keyboard keyboard-shortcuts pcb

Project files

Show this board on your page

https://pcbkit.io/boards/Matyas604/Matyas-s-Hackpad

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

Source

Repository: Matyas604/Matyas-s-Hackpad
Board file: PCB/Matyas's Hackpad.kicad_pcb
Commit: 3dd1a81
Licence: MIT

Parts

Qty	Value	Footprint	References
8	1N4148	Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8
7	SK6812MINI-E	footprints:SK6812MINI-E_fixed	D9, D10, D11, D12, D13, D14, D15
7	SW_Push	Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB	SW1, SW2, SW3, SW5, SW6, SW7, SW8
1		clipboard:462f2333-586c-4cc8-b04d-9995b911b9d8
1		clipboard:de5363f7-c900-46a6-94f2-35cc7d6a2b93
1	MOUDLE-SEEEDUINO-XIAO	footprints:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM	U1
1	OLED_DISPLAY	footprints:SSD1306-0.91-OLED-4pin-128x32	J1
1	RotaryEncoder_Switch	Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW4

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Questions

How big is the Matyas s Hackpad PCB?

It measures 80 × 62.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Matyas s Hackpad use?

27 parts, built around the SK6812MINI-E. 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 Matyas s Hackpad KiCad files?

From the Matyas604/Matyas-s-Hackpad repository on GitHub, at the commit this page was made from: the board is PCB/Matyas's Hackpad.kicad_pcb and its schematic PCB/Matyas's Hackpad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Matyas s Hackpad 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).