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

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)

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

R0.3:

• 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.