4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers83.5 × 57 mm
Hackpad
Kirito139/pulsarhackpad
- Size
- 83.5 × 57 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 25
- Pads
- 105
- Tracks, vias
- 140, 17
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Jul 2025
- Updated
- 11 Jul 2025
Overview
Hackpad is an open-source printed circuit board by Kirito139, from the Kirito139/pulsar repository on GitHub. It is a 2-layer board of 83.5 × 57 mm with 22 parts on 25 nets, routed with 140 tracks and 17 vias.
It is built around the SK6812MINI-E. Its parts include 11 diodes, 9 switches, 1 IC and 1 connector. It belongs with the lEDs and displays boards and the RP2040 boards of this library.
Main components
1README
README.mdPulsar is a rather simple (its my first ever hardware project) macropad which I made for highway.hackclub.com. It features a 3x3 electrical matrix arranged into a 2x4 key grid and a rotary encoder. There's also an OLED display and two NeoPixels! Rather simple design but I'll probably come back and improve it sometime.
Images
BOM
I will 3d print the case myself.
Here's the BOM that KiCad generated:
| Reference | Qty | Value | DNP | Exclude from BOM | Exclude from Board | Footprint | Datasheet |
| D1,D2 | 2 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | https://cdn-shop.adafruit.com/product-files/2686/SK6812MINI_REV.01-1-2.pdf | |||
| D3,D4,D5,D6,D7,D8,D9,D10,D11 | 9 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | https://assets.nexperia.com/documents/data-sheet/1N4148_1N4448.pdf | |||
| J1 | 1 | Conn_01x04_Pin | hackpad:SSD1306-0.91-OLED-4pin-128x32 | ~ | |||
| SW1,SW2,SW3,SW4,SW5,SW7,SW8,SW9 | 8 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | ~ | |||
| SW6 | 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | ~ | |||
| U1 | 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP |
I will also need 4 m3.5 screws
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| 8 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW7, SW8, SW9 |
| 2 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D1, D2 |
| 1 | Conn_01x04_Pin | hackpad:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW6 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the Hackpad PCB?
It measures 83.5 × 57 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackpad use?
22 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 Kirito139/pulsar 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 Kirito139 before reusing the design.
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