Congratulations! No matter how many projects you’ve completed in this book, you are set to build more smart objects.

If you come up with an idea for a smart object, check online to see if anyone has made something similar. Do an Internet search and include the word “arduino,” like “automatic cat feeder arduino.” Arduino enthusiasts are pretty great about sharing their process and their code. (And there are lots of guides to building cat feeders!)

Want to browse possible projects? Here are some good places to start:

• Adafruit Arduino Lessons: Take what you learned here and keep going with motors, displays, and more (http://keefe.cc/more-1).
• Hackster.io Arduino Projects: Pages and pages of projects contributed by Arduino makers like you (http://keefe.cc/more-2).
• The Arduino Playground: A loooong list of projects people have built and posted. Some are super simple, and some are crazy complicated. All are fascinating. Be sure to scroll down to the “Top 40” (http://keefe.cc/more-3).

The more you explore, the more you’ll see different flavors of Arduinos beyond the Arduino Uno you’ve been using. These will include tiny ones, sewable ones, and big-brained ones. Each will have its own quirks and features, but almost all of them can be programmed with the Arduino software you’ve installed. For guides and tutorials on all kinds of Arduinos, I often turn to the SparkFun and Adafruit websites.

Wherever your explorations take you from here, I’d love to hear about it! Tweet me on Twitter at @jkeefe or drop me a note at [email protected].

Happy making!

—John Keefe, Summer 2016