[sargstuff]

old school solid state with modern 3d printed techniques : rotational / motion dependencies only!

https://hackaday.com/2019/03/02/3d-printing-logic-gates/

https://hackaday.com/2017/01/03/make-logic-gates-out-of-almo...

https://www.nature.com/articles/s41467-019-08678-0

https://www.youtube.com/watch?v=unzNxzKcAGY