2 layers132.3 × 94.9 mm
2 layers95.3 × 99.3 mm
Under1hundo
doesntfazer/Under1hundo434 key split keyboard under 100x100mm for cheap manufacturing
- Size
- 95.3 × 99.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 23
- Pads
- 260
- Tracks, vias
- 410, 31
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 7 Aug 2024
- Updated
- 7 Aug 2024
Overview
Under1hundo is an open-source printed circuit board by doesntfazer, from the doesntfazer/Under1hundo repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 95.3 × 99.3 mm with 23 parts on 23 nets, routed with 410 tracks and 31 vias.
It is built around the RP2040-ZERO. Its parts include 17 switches and 2 ICs. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
1README
README.md100x100mm split keyboard, for cheap manufacturing by PCBway. reversible, and hot swap. The 2040 zero is soldered face down when facing the left side of the board.
Parts list.
2x PJ-320A TRRS jacks
2x RP2040 zero
2x Plates, Left and right (Optional: 3d printed)
2x Case Left and right (Optional: 3d printed)
8x M2 heat set inserts (only needed if printing case)
8x M2 8mm-10mm Screws (only needed if printing case)
34x hot swap sockets
34x Cherry MX style switches
Check out the firmware
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | SW_PUSH | kbd:CherryMX_MidHeight_Hotswap | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17 +1 |
| 4 | M2_Hole_TH | kbd:M2_Hole_TH | M2, M2, M2, M2 |
| 1 | TRRS | Keebio-Parts.pretty-master:TRRS-PJ-320A-rev - Copy | U2 |
| 1 | rp2040-zero | mcu:rp2040-zero-tht-nocut | U1 |
Questions
How big is the Under1hundo PCB?
It measures 95.3 × 99.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Under1hundo use?
23 parts, built around the RP2040-ZERO. 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 Under1hundo KiCad files?
From the doesntfazer/Under1hundo repository on GitHub, at the commit this page was made from: the board is under1hundo/under1hundo.kicad_pcb and its schematic under1hundo/under1hundo.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Under1hundo design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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