Clewsy just shared a new project: "grinder_timer testing "
This is a programmable timer tethered to a Rancilio Rocky coffee grinder. The Rocky is a “dumb” grinder and electrically very simple. Basically it’s an ac motor with an on/off switch and a momentary push-button to grind. This project adds an electronic timer so that repeatable grind quantities can be produced without having to stand over the grinder.