4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers80 × 62.5 mm
Sealflux'sMacropad
Sealflux/MacropadAn 8-key macropad with OLED, rotary encoder, and RGB LEDs. Powered by a Seeed XIAO RP2040 running KMK firmware.
- Size
- 80 × 62.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 29
- Pads
- 104
- Tracks, vias
- 262, 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Jun 2026
- Updated
- 6 Aug 2026
Overview
Sealflux'sMacropad is an open-source printed circuit board by Sealflux, from the Sealflux/Macropad repository on GitHub, published under the MIT licence. It is a 2-layer board of 80 × 62.5 mm with 27 parts on 29 nets, routed with 262 tracks and 4 vias.
It is built around the SK6812MINI-E. Its parts include 15 diodes, 8 switches and 2 ICs. It belongs with the keyboards and input and lEDs and displays boards of this library.
Main components
1README
README.mdSealflux
An 8-key macropad with OLED, rotary encoder, and RGB LEDs. Powered by a Seeed XIAO RP2040 running KMK firmware.
Features
- 7 Cherry MX switches + 1 rotary encoder (with pushbutton)
- 5 layers: Main, Media, Home Assistant, Game, Other
- Rotary encoder for volume and scrolling
- 128x64 OLED display showing current layer
- WS2812 RGB LEDs with animations
- KMK firmware (CircuitPython)
Hardware
- Seeed XIAO RP2040
- 7x Cherry MX switches
- 1x EC11 rotary encoder
- 1x SSD1306 128x64 OLED
- 7x WS2812 RGB LEDs
- 3D-printed case (top + bottom)
BOM
| Part | Quantity | Notes |
|---|---|---|
| Seeed XIAO RP2040 | 1 | |
| Cherry MX switches | 7 | |
| EC11 rotary encoder | 1 | |
| SSD1306 OLED 128x64 | 1 | I2C |
| WS2812 LEDs | 7 | |
| 1N4148 diodes | 7 | |
| M2 screws | 4 | |
| 3D-printed case | 1 set | top + bottom |
Pinout
| Function | XIAO Pin | GPIO |
|---|---|---|
| Col 0 | D0 | GP0 |
| Col 1 | D1 | GP1 |
| Col 2 | D2 | GP2 |
| Col 3 | D3 | GP3 |
| SDA | D4 | GP4 |
| SCL | D5 | GP5 |
| Row 0 | D6 | GP6 |
| Enc A | D7 | GP7 |
| Enc B | D8 | GP8 |
| Row 1 | D9 | GP9 |
| LED | D10 | GP10 |
Firmware
KMK (CircuitPython). To install, copy main.py and the KMK library folder to the XIAO RP2040 after flashing CircuitPython.
Schematic
PCB
Case
Photos
[Add photos after assembly]
Demo
[Add video link after assembly]
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 |
| 7 | SK6812MINI-E | XIAO_RP2040:SK6812MINI-E_fixed | D9, D10, D11, D12, D13, D14, D15 |
| 7 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW5, SW6, SW7, SW8 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | ER_OLEDM0.91_1x-I2C | 0.91 OLED:SSD1306-0.91-OLED-4pin-128x32 | U2 |
| 1 | MOUDLE-SEEEDUINO-XIAO | XIAO_RP2040:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_CircularMountingHoles | SW4 |
Questions
How big is the Sealflux'sMacropad PCB?
It measures 80 × 62.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sealflux'sMacropad use?
27 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 Sealflux'sMacropad KiCad files?
From the Sealflux/Macropad repository on GitHub, at the commit this page was made from: the board is PCB/Sealflux'sMacropad.kicad_pcb and its schematic PCB/Sealflux'sMacropad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sealflux'sMacropad design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 4 layers180.8 × 300.3 mm
Dilemma
Bastardkb/Dilemma
The Dilemma is a vertical stagger low-profile keyboard with mods.
383 parts590 - 4 layers48 × 32 mm
FlatSat
Pwnsat/FlatSat
Flatsat v1.0 is a hardware based platform for aerospace cybersecurity research
106 parts575GPL-2.0 - 2 layers
Demo
adamws/kicad-kbplacer
KiCad plugin for automatic keyboard's key placement and routing
48 parts547GPL-3.0 - 2 layers97 × 78.5 mm
Dumbpad
imchipwood/dumbpad
Simple 4x4 numpad with rotary encoder. Powered by QMK via ATmega32u4 Pro Micro
62 parts517GPL-2.0 - 4 layers82.5 × 39.4 mm
V4head
makerforgetech/modular-biped
An open source framework for creating a bipedal modular companion robot.
26 parts493GPL-3.0 - 2 layers115.7 × 95.7 mm
- 4 layers70 × 54 mm
