2 layers159.5 × 30 mm
Type f
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
25 parts3kApache-2.0
2 layers100 × 100 mm
Quantumpad
hridcode/quantumpadHey everyone! This is my submission for Hack Club Blueprint 2026! This is actually the first hardware project I've designed, and I had a lot of fun making it!
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 23
- Pads
- 105
- Tracks, vias
- 153, 5
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 1 Mar 2026
- Updated
- 5 Mar 2026
Overview
Quantumpad is an open-source printed circuit board by hridcode, from the hridcode/quantumpad repository on GitHub. It is a 2-layer board of 100 × 100 mm with 25 parts on 23 nets, routed with 153 tracks and 5 vias.
Its parts include 10 ICs, 10 diodes and 1 switch.
README
README.mdQuantumPad
Hey everyone! This is my submission for Hack Club Blueprint 2026! This is actually the first hardware project I've designed, and I had a lot of fun making it!
Features
- 9 MX switches
- Seeed Studio XIAO RP2040 MCU
- KMK firmware
- Rotary encoder + push button
- OLED display
Images
| Schematic | PCB | Macropad |
|---|---|---|
 |  |  |
Firmware
I just whipped up something quick because I don't really have anything to test it with :/ I might want to upgrade it in the future
BOM
- 1x Seeed Studio XIAO RP2040 MCU
- 9x Cherry MX Switches
- 1x EC11 rotary encoder
- 1x 0.91" SSD1306 OLED display
- 1x Case (2 3D-printed parts)
- 4x M3x5x4mm heatset inserts
- 4x M3x16mm screws
- 9x through-hole 1N4148 diodes
Notes
Have fun!
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D14, D15, D16, D18, D19, D20, D22, D23, D24 |
| 9 | ~ | MX_Solderable:MX-Solderable-1U | U1, U2, U3, U5, U6, U7, U9, U10, U11 |
| 1 | LOGO | LOGO | G*** |
| 1 | MOUDLE-SEEEDUINO-XIAO | footprints:XIAO-RP2040 | U17 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW2 |
| 1 | ~ | footprints:SSD1306-4pin-0.91 | D11 |
The 22 most common of 25 parts.
Questions
How big is the Quantumpad PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Quantumpad use?
25 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 Quantumpad KiCad files?
From the hridcode/quantumpad repository on GitHub, at the commit this page was made from: the board is pcb/quantumpad.kicad_pcb and its schematic pcb/quantumpad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Quantumpad design in my own project?
Its repository states no licence, so its author keeps all rights: ask hridcode before reusing the design.
Similar boards
- 2 layers113.5 × 95.1 mm
Sweep high
davidphilipbarr/Sweep
Sweep - a small promicro based keyboard inspired by the Ferris.
25 parts2.1k - 2 layers75 × 30 mm
- 2 layers58.4 × 114.3 mm
PicoPedal
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
25 parts915 - 2 layers54 × 15 mm
Xyp gpib
xyphro/UsbGpib
Versatile, cheap and portable USB to GPIB converter (USBTMC class based)
25 parts690MIT - 2 layers50 × 76 mm
- 2 layers237.5 × 102.9 mm
Storage
jes/scamp-cpu
A homebrew 16-bit CPU with a homebrew Unix-like-ish operating system.
25 parts301Unlicense - 2 layers43.3 × 21 mm
