Levinson Keyboard - 40% Split Ortholinear (Let's Split) - PCB Kit

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The Levinson an improved version Let's Split and adds LED backlight and 2u key support. Supports MX/Alps/Choc switches.

There are three different types of Levinson PCBs currently available:

  • Levinson Rev. 3 PCB Kit (this item): More DIY involved, where you have to solder on diodes/resistors/Pro Micro yourself
  • Nyquist/Levinson Rev. 3 (see the product page): Less DIY involved. Already has everything except switches soldered to it. Bottom row can be broken off to convert the Nyquist to a Levinson layout.
  • Nyquist/Levinson Rev. 4 (see the product page): Has MX-compatible hotswap sockets and per-key RGB LEDs pre-soldered on. Bottom row can be broken off to convert the Nyquist to a Levinson layout.


Each half of the board is a 4x6 matrix, but there is the option to have a 2u key in the innermost corners in place of 2 1u keys. The spot for the 2u has holes for Cherry PCB mounted stabilizers. This layout needs 48 keycaps.

  • 2 Levinson PCBs (1 left half, 1 right half)
  • 2 Push buttons for reset
  • 2 TRRS jacks
  • 48 1N4148 through-hole diodes
  • 2 4.7kΩ resistors for I2C
  • 2 MOSFETS and resistors for LED support

This keyboard uses the popular open-source QMK Firmware with VIA enabled out of the box to allow you to remap all the keys just the way you want them.

Plug your keyboard in, open up the VIA app, and easily change what each key does to get the most out of your keyboard with your customizations! More info on what you can do here: VIA Usage Guide

The case files for a sandwich-style case can be found here on github.

The kerf setting was set to 0.15mm for use with Lasergist and Ponoko.

The Name

Continuing the theme of prominent people in signal processing and digital communications, the board is called the Levinson, after the Levinson-Durbin recursion algorithm. There also happens to be the Split Levinson recursion as well, which fits nicely into the world of split keyboards.

Default Keymapping

The default keymapping that the board is pre-programmed with can be found here: Default Keymaps