Arduino has an enormous fanbase around the world and is frequently used for classes, hobbies, computer tinkering, and projects from hopeful inventors. Sure, it may not be quite as user-friendly as rivals like the Raspberry Pi, but this programmable logic controller is even more customizable than the former. To celebrate its long-term success, we’ve collected 12 of the coolest, most revolutionary, and most entertaining Arduino projects currently in existence. Prepare to be wowed — and then inspired!

Do keep in mind that these projects are a bit complicated, some more so than others. A few of them you could probably do in a weekend, but many are long-term projects that are more suitable for a semester project or summer hobby. We also tried to avoid projects that require a 3D printer for most of our top picks, but access to one of these printers may still be helpful.