Title ahould contain "(2015)" - you'll see the "2015-01-07" date at the bottom.
The original Atreus was programmed with Microscheme, but it has not been that way for a few years at least. TMK was the recommended firmware when I started using one in 2016. Currently you'll see QMK as the defacto. That will likely change this year after the Atreus 2 is released. The kickstarter campaign for it launched one week ago.
Scheme still is used in the project, just not for firmware. The git repo has a scheme program in it to generate a PCB for an Atreus provided one specifies the desired number of rows, number of columns, angle, and column-stagger.
The original Atreus was programmed with Microscheme, but it has not been that way for a few years at least. TMK was the recommended firmware when I started using one in 2016. Currently you'll see QMK as the defacto. That will likely change this year after the Atreus 2 is released. The kickstarter campaign for it launched one week ago.
Scheme still is used in the project, just not for firmware. The git repo has a scheme program in it to generate a PCB for an Atreus provided one specifies the desired number of rows, number of columns, angle, and column-stagger.