4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers99.5 × 78.5 mm
Boompad
TheTwoBoom/boompadSimple hackpad with 8 keys, an oled display, 4 Neo-LEDs, and an rotary encoder
- Size
- 99.5 × 78.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 27
- Pads
- 111
- Tracks, vias
- 149, 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Jun 2025
- Updated
- 18 Jun 2025
Overview
Boompad is an open-source printed circuit board by TheTwoBoom, from the TheTwoBoom/boompad repository on GitHub. It is a 2-layer board of 99.5 × 78.5 mm with 23 parts on 27 nets, routed with 149 tracks and 4 vias.
It is built around the SK6812MINI-E. Its parts include 12 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.mdboompad
Simple hackpad with 8 keys, an oled display, 4 Neo-LEDs, and an rotary encoder
Inspiration
I simply wanted to kind of "max out" the hardware side of my hackpad, so I challenged myself to use the pins of the pico in the most efficient way
Challenges
Using the correct measurements was a very difficult task, I had to redesign everything like 2-3 times until I finally noticed that my pcb was 4mm too big....
Specifications
BOM:
- 8x Cherry MX Switches
- 8x Through-hole 1N4148 Diodes
- 4x SK6812 MINI Leds
- 1x XIAO RP2040
- 1x EC11 Rotary encoder
- 1x 0.91 inch OLED display
- 8x Blank DSA Keycaps
- 4x M3x16 Bolt
- 4x M3 Heatset
Others:
- KMK Firmware
- TopCase.stl
- BottomCase.stl
| Schematic | PCB | Case |
|---|---|---|
 |  |   |
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1.1, D1.2, D1.3, D1.4, D2.1, D2.2, D2.3, D2.4 |
| 8 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1.1, SW1.2, SW1.3, SW1.4, SW2.1, SW2.2, SW2.3, SW2.4 |
| 4 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | LED1, LED2, LED3, LED4 |
| 1 | Conn_01x04_Pin | OLED_Display:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | RotaryEncoder | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | SW3 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the Boompad PCB?
It measures 99.5 × 78.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Boompad use?
23 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 Boompad KiCad files?
From the TheTwoBoom/boompad repository on GitHub, at the commit this page was made from: the board is pcb/Boompad.kicad_pcb and its schematic pcb/Boompad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Boompad design in my own project?
Its repository states no licence, so its author keeps all rights: ask TheTwoBoom before reusing the design.
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