2 layers290.5 × 176.2 mm
2 layers290.5 × 102.1 mm
Lettio pcb.old
digitarhythm/lettioThis repository is keyboard project for TReK Lettio.
- Size
- 290.5 × 102.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 142
- Nets
- 115
- Pads
- 699
- Tracks, vias
- 1,834, 147
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Aug 2026
- Updated
- 29 Sep 2026
Overview
Lettio pcb.old is an open-source printed circuit board by digitarhythm, from the digitarhythm/lettio repository on GitHub, published under the MIT licence. It is a 2-layer board of 290.5 × 102.1 mm with 142 parts on 115 nets, routed with 1,834 tracks and 147 vias.
It is built around the RP2040-ZERO and SK6812MINI-E. Its parts include 48 diodes, 45 switches, 44 inductors and 1 IC. It belongs with the RP2040 boards of this library.
Main components
2
RP2040-ZERO
-- Development Boards & Kits ROHSWaveshareDevelopment Boards & Kits
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
README
README.mdParts
142| Qty | Value | Footprint | References |
|---|---|---|---|
| 48 | D | kbd_Parts:Diode_SMD | D0, D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22 +32 |
| 44 | SK6812MINI | kbd_Parts:LED_SK6812MINI-E_BL | L1, L2, L10, L11, L12, L13, L14, L15, L16, L17, L18, L19, L20, L21, L22, L23 +28 |
| 44 | SW_PUSH | kbd_SW:Choc_v1v2_Hotswap_1u(short_pad) | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +28 |
| 3 | kbd_Parts:RotaryEncoder_EC12E | RotaryEncoder_Switch, RotaryEncoder_Switch, RotaryEncoder_Switch | |
| 1 | K-SILVER_JS16 | kbd_SW:K-SILVER JS16 | SW48 |
| 1 | LOGO | LOGO | G*** |
| 1 | rp2040-zero | RP2040:rp2040-zero(THonly) | U1 |
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Questions
How big is the Lettio pcb.old PCB?
It measures 290.5 × 102.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lettio pcb.old use?
142 parts, built around the RP2040-ZERO and 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 Lettio pcb.old KiCad files?
From the digitarhythm/lettio repository on GitHub, at the commit this page was made from: the board is pcb/production.old/lettio_pcb.old.kicad_pcb and its schematic pcb/lettio_pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lettio pcb.old 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).