Technical Specifications For: Wireless Corne PCB

The Wireless Corne SMT is a fully assembled, ZMK-powered split keyboard PCB designed to fit standard Corne cases while removing the need for cables or external microcontrollers.

Firmware and Configuration

The board comes pre-flashed with ZMK. The default firmware is configured to support ZMK Studio, which is the recommended method for reflashing and changing keymaps.

• GitHub Repository: https://github.com/boardsource/wireless-corne_zmk_config

Power and Battery Management

The PCB features two methods for connecting a battery. If shipping regulations allow for your destination, a battery will be included with your order.

1. JST Connector: The board uses a micro JST connector, part number BM02B-ACHSS-GAN-ETF.

2. Solder Pads: There are two open solder points located directly next to the JST connector labeled + and - for those using custom batteries.

Maximum Battery Dimensions:

• Choc Builds: 30mm x 17mm x 3mm

• MX Builds: 30mm x 17mm x 6mm

Note: Maximum dimensions are for fitting in the PCB battery cutout under a switch plate. You may be mounting else ware, and these should be disregarded. 

The power switch is located where the TRRS jack is traditionally found on wired Corne builds, allowing for easy access through existing case cutouts.

Switch Compatibility and Spacing

This PCB uses a universal footprint that supports three different switch types without hardware modification. All hotswap sockets are pre-installed.

• Supported Switches: MX, Choc v1, and Choc v2.

• Switch Spacing: 19.05mm (standard spacing) across all switch types.

Case Compatibility

The Wireless Corne SMT is designed to be fully compatible with the Boardsource Unicorne case. It is also designed to be backwards compatible with most standard Corne (CRKDB) cases, including 3D-printed and high-profile options. While we have designed it to fit the standard footprint, not every third-party case has been tested.

Expansion Pinout

Each half of the keyboard features an 8-pin header. These pins are primarily intended for screens like the nice!view or e-ink displays, but they can be used for any peripheral including trackpads or more experimental hardware.

The pinout is identical for both the left and right PCBs (it is not mirrored). The pins are ordered Left to Right as follows:

Note on VCC: The VCC pin on this header is switched and is controlled via Pin 0.31.