2 layers228.4 × 85 mm
LeChiffre
tominabox1/Le-Chiffre-Keyboard
Great thanks goes to Jake at P3D for really making the case amazing and open sourcing his work. Check him out at P3Dstore.com
105 parts183GPL-3.0
2 layers248.3 × 99.8 mm
Litl
mohoyt/litl75Litl is an easy to build 40% keyboard using only through hole components.
- Size
- 248.3 × 99.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 105
- Nets
- 69
- Pads
- 418
- Tracks, vias
- 732, 9
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 13 Mar 2022
- Updated
- 21 Mar 2025
Overview
Litl is an open-source printed circuit board by mohoyt, from the mohoyt/litl repository on GitHub. It is a 2-layer board of 248.3 × 99.8 mm with 105 parts on 69 nets, routed with 732 tracks and 9 vias.
Its parts include 54 switches, 47 diodes, 1 IC and 1 connector. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
README
README.mdlitl
Litl is an easy to build 40% keyboard using only through hole components. It uses a separate microcontroller (like the Pro Micro or Elite C) to enable flexibility in connectivity and to further simplify the soldering experience (no more tricksy USB ports).
Litl is licensed under the Creative Commons Attribution-NonCommercial 4.0 International license. This design as it stands in this repository may be freely reproduced, modified, and manufactured for PERSONAL USE ONLY and may not be reproduced in physical form for public sale.
Litl kits are available for sale at sthlmkb.com
Features
- Only through hole components for easy soldering
- Separate microcontroller using Pro micro, Elite C, Nice! Nano or equivalent footprint. So micro USB, USB-C or Bluetooth are all options!
- 1 or 2 rotary encoders
- OLED screen (though only 1 rotary encoder is possible if using OLED)
- Multiple layout options including split space (2.25u + 1u + 2.75u), split left shift (1.25u + 1u), split enter (1u + 1.25u) and stepped capslock (layout)
- Open and visible components (in the style of Plaid, Romac etc)
- Simple and flexible case options
Components required
- PCB
- FR4 Switch plate
- FR4 Base
- Controller (e.g. Pro micro, Elite C, Nice! Nano or something with similar footprint/pinout)
- Switches (5 pin MX footprint) (up to 45)
- Diodes (47)
- Rotary encoders (1 or 2)
- Rotary encoder knobs (1 or 2)
- 0.91" OLED screen
- 10mm M2 Standoffs (6 required if mounting the base to the plate)
- Acrylic cover for the components at the top (optional)
- Stabilisers (PCB mount) (4 x 2u or 2 x 2u + 6.25u or 2 x 2u depending on layout)
- Rubber feet for the base
Known issues
Have been fixed in v2 (and gerbers now updated) but were present in v1
- Esc key is missing holes for 5 pin switches (workaround is to cut the pins off that switch to make it 3 pin and with the plate it will still be stable)
- Track routing goes under the front logo and makes it less clear, needs rerouting slightly
- OLED pins are reversed so the OLED has to be mounted facing left (over the diodes) instead of right
Have been fixed in v3 (and gerbers now updated) but were present in later iterations of v2
- Pin for switch alternative on left rotary encoder shorted with ground
- Holes for optional acrylic cover have been readded
Parts
105| Qty | Value | Footprint | References |
|---|---|---|---|
| 47 | D_Small | Keebio-Parts:Diode | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +31 |
| 37 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW2, SW3, SW10, SW11, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23, SW24, SW25, SW29 +21 |
| 6 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_1.25u_PCB | SW13, SW28, SW42, SW43, SW45, SW50 |
| 3 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_2.25u_PCB | SW26, SW27, SW46 |
| 2 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_1.75u_PCB | SW14, SW39 |
| 2 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_1.50u_PCB | SW1, SW12 |
| 2 | RotaryEncoder_Switch | Keebio-Parts:RotaryEncoder_EC11 | SW51, SW53 |
| 1 | Conn_01x04 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_6.25u_PCB | SW47 |
| 1 | KEYSW | Button_Switch_Keyboard:SW_Cherry_MX_2.75u_PCB | SW48 |
| 1 | ProMicro | Keebio-Parts:ArduinoProMicro-ZigZag | U1 |
The 103 most common of 105 parts.
Questions
How big is the Litl PCB?
It measures 248.3 × 99.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Litl use?
105 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 Litl KiCad files?
From the mohoyt/litl repository on GitHub, at the commit this page was made from: the board is PCB/litl.kicad_pcb and its schematic PCB/litl.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Litl design in my own project?
Its repository states no licence, so its author keeps all rights: ask mohoyt before reusing the design.
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