In terms of electronics, there’s an ESP32, a pair of stepper motor controllers, and a relay for the solenoids. As of right now it all lives in a rather utilitarian box that’s tethered to the ...

The ESP32 is set up to control a set of four stepper motors with a ULN2003 IC, and they run the neat time display mechanism. All the custom parts are 3D printed, and the sliding tile concept is ...