Skip to content
Kit orders placed today ship within 🔴 12-15 business days

Corne Chocolate Low-profile Hotswap Split Ergo 40% Kit

33.88

Build your very own low profile hotswap split ergo 40% custom keyboard from scratch!

Easy to build, uses Pro Micro (or compatible) controllers.

Read more…

In Stock
  • Layout *

  • Plate Type *

    Tenting case includes a 3 mm bottom plate with tenting lugs for M5 tenting hardware (see below in add-ons)

  • Switch Plate Colour *

  • Mid-layer *

    Optional mid layer fills the gap between the PCB and the bottom plate. 3 mm mid layer allow putting thin batteries underneath the PCB.

  • Bottom Plate *

  • *

    With mid-layer, the bottom plate will be 3 mm thick. Smoky Grey 3 mm acrylic is a bit lighter than the 2 mm one.
  • Acrylic Colour (3 mm) *

  • Add-ons *

    nice!nano V2 Wireless Controller

    25.05

    Powerful wireless Pro Micro drop-in replacement

    AddRemove

    nice!nano V2 Wireless Controller

    (3 customer reviews)

    25.05

    Powerful wireless Pro Micro drop-in replacement

    Read more…

    ×

    Frood RP2040 Pro Micro Controller

    9.9814.52

    Powerful and affordable RP2040-based Pro Micro drop-in replacement

    AddRemove

    Sale!

    Frood RP2040 Pro Micro Controller

    (2 customer reviews)

    9.9814.52

    Powerful and affordable RP2040-based Pro Micro drop-in replacement

    Read more…

    ×

    Controller Sockets/Pins/Headers

    0.489.68

    Various sockets / pins for Pro Micro/nice!nano/Frood and similar controllers Pack for one controller

    AddRemove

    Controller Sockets/Pins/Headers

    0.489.68

    Various sockets / pins for Pro Micro/nice!nano/Frood and similar controllers

    Pack for one controller

    Read more…

    ×

    nice!view Power-Efficient 1″ LCD Display

    24.20

    Extremely power-efficient and fast LCD display Next batch expected around 19 September 2024

    AddRemove

    nice!view Power-Efficient 1″ LCD Display

    24.20

    Extremely power-efficient and fast LCD display

    Next batch expected around 19 September 2024

    Read more…

    ×

    OLED Display Module 0.91″ 128×32

    3.754.84

    0.91" OLED module with 128x32 pixel resolution

    AddRemove

    Sale!

    OLED Display Module 0.91″ 128×32

    3.754.84

    0.91″ OLED module with 128×32 pixel resolution

    Read more…

    ×

    Low Profile OLED Socket (1 pc)

    1.09

    Low profile socket good for socketing OLED screens with standard (thick, square) header pins Includes a single 4-pin one row socket.

    AddRemove

    Low Profile OLED Socket (1 pc)

    1.09

    Low profile socket good for socketing OLED screens with standard (thick, square) header pins

    Includes a single 4-pin one row socket.

    Read more…

    ×

    SK6812 (WS2812B) RGB LED Modules (10 pcs) – SK6812 MINI (3535)

    1.21

    Type: SK6812 MINI (3535)

    Read more…

    ×

    Plain/Braided/Metal TRRS cable (Sold Out)

    3.876.05

    TRRS cable for use with split keyboards

    AddRemove

    Plain/Braided/Metal TRRS cable

    3.876.05

    TRRS cable for use with split keyboards

    Read more…

    ×

    Tenting/Tilting Hardware

    4.84

    Nuts and bolts for use as legs with our tenting kits Includes bolts and nuts for both halves of a split keyboard (2 of each 35, 45, 60 and 70 mm M5 bolts + 16x M5 half nuts)

    AddRemove

    Tenting/Tilting Hardware

    4.84

    Nuts and bolts for use as legs with our tenting kits

    Includes bolts and nuts for both halves of a split keyboard (2 of each 35, 45, 60 and 70 mm M5 bolts + 16x M5 half nuts)

    Read more…

    ×
  • Soldering

    We can solder the kit for you. It will add 3-5 days to the order processing time.
    Price is just for the service, no extra parts included.
    If you want the controllers to be removable, please include 2 packs of controller sockets + pins.

  • *

    Sorry, we don't provide the full in-switch RGB module soldering service. The modules are a big pain to solder in this kit and we could not guarantee good reliability.

Product total

Options total

Grand total

SKU: K-CORNE-CHOC-BLK Categories: , Tags: , , , , ,

Designed by Kosuke Adachi (a.k.a. foostan). The designer receives a portion of the proceeds from every sale.

This is version v2.4 modified by 42. Keebs to include a power switch and battery connector for wireless operation and native nice!view support.

Build your very own custom split keyboard from scratch!

  • Split 12×3 + 6 (40%-ish) ortho/ergo layout with an OLKB MX spacing (19.00×19.00 mm)
  • Supports Kailh Choc V1 switches only
  • Uses Kailh Choc hotswap sockets
  • Supports in-switch RGB LEDs and RGB underglow
  • Optional OLED screens
  • Includes a power switch and battery pads on the PCB (v2.3)
  • Native support for the power-efficient nice!view screens (v2.4)
  • Optional mid-plate available for a neater case without gaps
  • Fairly easy to build – based on Pro Micro controllers, but uses SMD diodes
  • Tinned lead-free finish, black solder mask

⚠️💀 Warning: Never plug/unplug the TRRS cable while the keyboard is powered! It could damage the data pin of the controller. 💀⚠️

Please note, the RGB pin had to be changed to pin 14 (B2 / GPIO23) for native nice!view support. RGB is not supported out of the box when using the nice!nano (minor modification required), and custom Vial firmware is required for RGB support using the Frood (available soon from our firmware page).

Original build guide in the GitHub repository (TODO: add information about modifications)

Kit contents

  • 2x main PCB
  • 2x 2 mm acrylic switch plate (clear or smoky grey)
  • Optional 2 or 3 mm foam mid-layer (to fill the gap between the PCB and the bottom plate)
  • 2x 2 mm or 3 mm acrylic bottom plate (clear or smoky grey)
  • 44x SMD diodes (42 + 2 spare)
  • 42x Kailh Choc V1 hotswap socket
  • 2x TRRS socket
  • 2x SMD power switch
  • 2x Reset switch
  • Brass standoffs and screws
  • Acrylic covers

Required parts not included in the kit

  • 2x Pro Micro-compatible controllers (Frood, nice!nano etc.)
  • 42x Kailh Choc V1 switches
  • TRRS cable (for a wired build)

Optional parts not included in the kit

  • Controller sockets/pins (to make them removable)
  • nice!view screens
  • OLED screens + OLED sockets
  • 12x SK6812MINI in-switch RGB LEDs for underglow
  • 42x SK6812MINI in-switch RGB LEDs
Weight 0.26 kg
Stock Status

Coming Soon

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Product Enquiry

⚠ 👉 We're dealing with order backlog, apologies for the delay 🙏 👈 ⚠
🟠 Reopening on Wed 10 May. Thanks for your patience! 🟠