2 layers57 × 55.2 mm
LogicAnalyzer
gusmanb/logicanalyzer
24 channel, 100Msps logic analyzer hardware and software
10 parts5.1kGPL-3.0
2 layers90 × 50 mm
Lainboard
crtscreen/MacroNAVIA simple macropad with an OLED display for media shortcuts. Made for HackClub.
- Size
- 90 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 21
- Pads
- 51
- Tracks, vias
- 24, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 5 Oct 2026
- Updated
- 5 Nov 2026
Overview
Lainboard is an open-source printed circuit board by crtscreen, from the crtscreen/MacroNAVI repository on GitHub. It is a 2-layer board of 90 × 50 mm with 10 parts on 21 nets, routed with 24 tracks and 0 vias.
Its parts include 3 switches, 1 IC and 1 connector. It belongs with the keyboards and input and lEDs and displays boards and the RP2040 boards of this library.
README
README.mdMacroNAVI
MacroNAVI is a simple 3-key macropad with an OLED display, and uses KMK firmware. The reasoning for its lack of features is that I want it to serve as something small that I can take with me. The main standout is supposed to be the open case, which exposes the PCB, showing the controller and some cool art on the PCB. I built this macropad for Hackpad, as part of Stardance.
Features
- Three MX switches
- 128x32 OLED Display
- Exposed case
- KMK firmware
Case
It has two case pieces, fitted together with four (4) screws and heat-set inserts. I used FreeCAD for the case design because I dislike Fusion360. The editable FreeCAD files, complete STEP assembly, and printable STLs are in cad/.
PCB
PCB made using KiCad. The source files and project libraries are in pcb/, and manufacturing files are packaged in pcb/gerbers.zip.
Schematic
Here's a screenshot of the schematic:
Firmware
The firmware is in firmware/main.py and uses KMK on CircuitPython.
| Key | Current assignment |
|---|---|
| Left | F13 |
| Middle | F14 |
| Right | F15 |
The OLED is configured to display "COPLAND OS" and the key assignments. When I actually build it I will probably remap these keys to be media controls.
Credits
Huge thanks to the Alex Ren at Hackpad for running this awesome YSWS project.
BOM
| Part | Quantity |
|---|---|
| Seeed Studio XIAO RP2040 | 1 |
| MX-style switches | 3 |
| White blank DSA keycaps, 1u | 3 |
| 0.91-inch 128×32 I²C OLED, GND-VCC-SCL-SDA | 1 |
| 1×7 male pin headers, 2.54 mm pitch | 2 |
| M3×16 mm screws | 4 |
| M3 heat-set inserts, 5 mm OD × 4 mm long | 4 |
| Custom MacroNAVI PCB | 1 |
| 3D-printed top plate | 1 |
| 3D-printed bottom case | 1 |
Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole_3.2mm_M3 | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3 |
| 1 | Conn_01x04 | lainboard:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | LOGO | lainboard:LainArt | LainArt |
| 1 | Seeed XIAO RP2040 board | lainboard:XIAO-RP2040-DIP | U1 |
Questions
How big is the Lainboard PCB?
It measures 90 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lainboard use?
10 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 Lainboard KiCad files?
From the crtscreen/MacroNAVI repository on GitHub, at the commit this page was made from: the board is pcb/lainboard.kicad_pcb and its schematic pcb/lainboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lainboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask crtscreen before reusing the design.
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