4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers57.4 × 96.8 mm
Hackpad
leonjohns-dev/SnowPad- Size
- 57.4 × 96.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 51
- Nets
- 44
- Pads
- 176
- Tracks, vias
- 381, 58
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 Aug 2026
- Updated
- 15 Aug 2026
Overview
Hackpad is an open-source printed circuit board by leonjohns-dev, from the leonjohns-dev/SnowPad repository on GitHub. It is a 2-layer board of 57.4 × 96.8 mm with 51 parts on 44 nets, routed with 381 tracks and 58 vias.
It is built around the SK6812MINI-E. Its parts include 18 inductors, 12 diodes, 12 switches, 1 IC and 1 connector.
Main components
1README
README.mdSnowPad
SnowPad is a 3x4 macro pad made for the Stardance Hack Club challenge
Features
- 12 Switches
- RGB Backlight
- OLED Screen
- RGB Lamp
- Water Drink Reminder Upcoming Feature
Shematic
PCB
- The PCB was designed using KiCad
- The 3d model was made using assets from Scotto Keeb's library of items
- Footprints come from KiCad and the Stardance care package
| Normal PCB View | Kicad 3D view |
|---|---|
BOM
| Part | Quantity |
|---|---|
| Mx Switches | 12 |
| Keycaps | 12 |
| 1N4148 Diodes | 12 |
| SK6812MINI-E RGB LEDs | 18 |
| Seeed Studio XIAO RP2040 | 1 |
| 0.91 inch OLED display | 1 |
CAD
- For the CAD, I am using Fusion 360 with the imported KiCad models
- The CAD consists of a bottom case and a top plate, which are both joined through 4 m3 screws and 4 heat inserts.
| Altogether | Bottom | Top Plate |
|---|---|---|
Case parts
| Part | Quantity |
|---|---|
| Top Plate | 1 |
| Bottom Container | 1 |
| M3x16mm screws | 4 |
| M3x5mx4mm heatset inserts | 4 |
Firmware
- Firmware took me a while to figure out😭
- I first tried QMK, but it had no 4x3 layouts; I tried making my own layout, which failed
- The current firmware is built on kmk which is pretty straightforward.
- Firmware was made with assistance from ChatGPT.
Parts
51| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | SK6812MINI-E | rgb:SK6812MINI-E_fixed | L1, L2, L3, L4, L5, L6, L7, L10, L11, L12, L13, L14, L15, L16, L17, L18 +2 |
| 12 | ~ | ScottoKeebs_Scotto:Diode_DO-35 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 12 | ~ | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12 |
| 5 | LOGO | LOGO | G***, G***, G***, G***, G*** |
| 2 | TestPoint | ScottoKeebs_Scotto:TestPoint | TP1, TP2 |
| 1 | MOUDLE-SEEEDUINO-XIAO | xiao:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM_1 | U1 |
| 1 | OLED_128x32 | ScottoKeebs_Components:OLED_128x32 | J1 |
Questions
How big is the Hackpad PCB?
It measures 57.4 × 96.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackpad use?
51 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 KiCad files?
From the leonjohns-dev/SnowPad repository on GitHub, at the commit this page was made from: the board is PCB/hackpad.kicad_pcb and its schematic PCB/hackpad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hackpad design in my own project?
Its repository states no licence, so its author keeps all rights: ask leonjohns-dev before reusing the design.
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