Anna is a wireless 40-key ortholinear split keyboard PCB open-sourced by Karl Grasegger.
KBD.news Published January 26, 2022
The Anna keyboard, named after the designer's sister, is built on a split ortholinear keyboard PCB with pads for Kailh hotswap sockets. It has 5 columns and 4 rows on each side and is built for usage with Pro Micro compatible controllers supporting Bluetooth – there is no TRRS jack.
40 keys split ortho
MX Kailh hotswap sockets only
Bluetooth only (no TRRS jack) MCU (Karl used a nice!nano)
you can fit a battery the size of a MCU on the opposite end of the PCB (e.g. a 250mah)
plate outline available in SVG/DXF formats to order a nice acrylic one (or an FR4 plate by importing it into KiCAD)