Awesome

Entropy

A 96% Southpaw keyboard, with split space and encoder support.

Entropy started as a STM32 powered keyboard running QMK and enclosed in a FR4 and PLA case, but at the time of writing runs on a nRF52 and ZMK, tucked inside a stacked acrylic case.

ZMK enables wireless functionality, and you'll get upwards of 6 months battery life thanks to the 200uA sleep current.

It also supports up to 4 rotary incoders in 5 different positions, along with a myriad of layout options.

Photos

Top View Side View Battery and Power Circuit

Layout

Supports Encoders in (0,0)...(0,3) and (0,19)

ZMK versions only allow 4 encoders to be populated (hiting interrupt limit with 5 encoders) KLE

Revision History

R0.1:

Original STM32 design, no bugs that can't be worked around.
Tested and working.

R0.2:

Removed overengineering, modified to suit JLCSMT.
Fixed plate 2U tight fit.
Has known issues with powering the LEDs, do not use

Image of R0.1 and R0.2 Design

R0.1 and R0.2 Assembled Keyboard

R0.3:

Moved to nRF52840 and ZMK due to supply issues with the STM32F303 used in R0.1 and R0.2.
Case design changed to plate mount in stacked acrylic case.
Design moved to KiCad V6.

R0.4:

Battery life and design improvements over R0.3.
Few issues requiring rework but suitable for use.

R0.5:

Resolved issues found in R0.4, however untested.
Use at your own risk.