4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers60 × 81.6 mm
HackPad V4
sudo-apt-install-tap/HackPad-V41A new and updated macropad for personal use!
- Size
- 60 × 81.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 32
- Pads
- 123
- Tracks, vias
- 303, 112
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 7 Jun 2026
- Updated
- 17 Oct 2026
Overview
HackPad V4 is an open-source printed circuit board by sudo-apt-install-tap, from the sudo-apt-install-tap/HackPad-V4 repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 60 × 81.6 mm with 32 parts on 32 nets, routed with 303 tracks and 112 vias.
It is built around the SK6812MINI-E. Its parts include 18 diodes, 9 switches and 2 ICs. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
1README
README.mdHackPad v4
A 9 Keys, Per-Key RGB with a 0.91" OLED Macropad!
Overview
A Macropad With 8 Keys addressable per key RGB and an OLED module
Why?
My old macropad doesn't get used that often and I cant keep track of all the 16 keys. Thus this will be a more compact build for me and hopefully I will be able to integrate this fully into my system.
also because SCREEN WITH CLIKIES
How?
Use the firmware in FIRMWARE . This is my first time using QMK and I'm proud of my work because this is much more efficient than circuitpy running KMK.
CAD
CAD files are available at CAD
Images
Full render
PCB
Sch
3D Viewer
BOM
| Part | What it's for | Qty | Unit | Total | Vendor |
|---|---|---|---|---|---|
| PCB | Printed circuit board | 1 | $5.00 | $5.00 | JLCPCB |
| Gateron Milky PRO Switch – 5pin | Switches that THOCC | 1 | $2.50 | $2.50 | MecKeys |
| Blank DSA Keycaps (1u) [Pack of 5] | Keycaps | 2 | $1.25 | $2.50 | MecKeys |
| Seeed Studio XIAO RP2040 v1.0 | MCU | 1 | $6.00 | $6.00 | Robu.in |
| 0.91 inch 128x32 Blue OLED Display Module with I2C/IIC Serial Interface | 2.32cm(0.91inch) I2C/IIC Blue Color OLED Display Module offers 128×32 pixel resolution. | 1 | $2.00 | $2.00 | Robu.in |
| 1N4148W-7-F-Diodes Incorporated-100V Independent Type 1.25V@150mA 4ns 300mA SOD-123 Switching Diodes ROHS | Diodes | 20 | $0.03 | $0.60 | Robu.in |
| sk6812 mini-e | Backlight | 9 | $0.00 | $0.00 | self sourced |
| Print legion | Case 3d printing | 1 | $6.40 | $6.40 | Print Legion |
| Parts subtotal | — | — | — | $25.00 | — |
| Tax & shipping | — | — | — | $5.00 | — |
| Total | — | — | — | $30.00 | — |
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | D | Diode_SMD:D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8, D9 |
| 9 | SK6812MINI-E | SK6812 MINI-E:MX_SK6812MINI-E | D10, D11, D12, D13, D14, D15, D16, D17, D18 |
| 9 | SW_Push_45deg | KEYS:SW_Cherry_MX_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 3 | LOGO | LOGO | G***, G***, G*** |
| 1 | OLED_0.91_I2C | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | U2 |
| 1 | XIAO-RP2040-DIP | XIAO:XIAO-RP2040-SMD | U1 |
Questions
How big is the HackPad V4 PCB?
It measures 60 × 81.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HackPad V4 use?
32 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 HackPad V4 KiCad files?
From the sudo-apt-install-tap/HackPad-V4 repository on GitHub, at the commit this page was made from: the board is pcb/pcb.kicad_pcb and its schematic pcb/pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HackPad V4 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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