Levinson Keyboard - 40% Split Ortholinear (Let's Split w/LED backlight) - PCB Kit
The Levinson is like the Let's Split but with LED backlight and 2u key support.
Note: The current Rev. 2.2 PCB available is incompatible with the plates that have internal holes. They are compatible with the cases/plates with exterior holes. This issue will be fixed in the next revision.
The PCB Kit includes the following:
- 2 Levinson PCBs
- 2 Push buttons for reset
- 2 4.7kΩ resistors for I2C to install on the master half
- 2 TRRS jacks (no need to buy separately)
- 48 1N4148 through-hole diodes (if you want SMD diodes instead, please request this in your order notes)
- LED support components - 2 MOSFETs, 2 100Ω and 2 100kΩ resistors
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.
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.
The Levinson uses QMK for its firmware, and the code for it has been merged into the main codebase. You can find it here: QMK - Levinson directory.
Cases and plates can be purchase here: Levinson/Let's Split Plates and Cases.
The case files for a sandwich-style case are still under development.
The kerf setting was set to 0.15mm for use with Lasergist and Ponoko.
Items needed for build
- 24 Diodes per PCB (through-hole and SMD diodes supported)
- 2 Arduino Pro Micro
- 2 Push buttons (included with this item)
- 2 4.7k resistors if using I2C (included with this item)
- Switches - Alps or MX-compatible
- 2 TRRS Jacks (included with this item)
- TRRS cable
- Micro USB cable
- Optional - 2u PCB mount MX stabilizer if using 2u keys
- Optional - LED support components - 2 MOSFETs, 2 100Ω and 2 100kΩ resistors (included)
- Optional - LEDs and 470Ω resistors
The build guide is nearly identical to that of the Iris, so you can use this guide.
NOTE: For the Levinson 2.0 PCB, the LED pad meaning is reversed compared to the Iris. Square pad is the anode (+), circle pad is the cathode (-). This will be changed to match the Iris in future revisions.
The White 2.1 PCBs have this fix applied to it.