Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.
I used Arduino to build an automated RDT adapter for grinding espresso beans in such a manner that they don’t spread all over your counter. It was a fun project and learned a lot about the chemistry of beans.