Official Arduino Example Tutorials: The Arduino computer software is loaded with tons of examples for you to use in your own code or to run through as a learning experience.

The Arduino microcontroller takes over from there and executes your code on the Arduino. During upload, if your Arduino has an RX (Receive) LED built-in, you should see it flash rapidly as it ...

Running out of GPIO pins? Learn how to connect multiple buttons to just one Arduino pin using clever wiring and resistor techniques. Perfect for compact projects, keyboards, or when using small ...

Arduino is designed to allow you to execute code without all the fuss of dealing with an operating system. And since it does one thing and only one thing at a time, it’s really, really easy to use.

That provides a professional development environment, at least. The code base for the Arduino is another frustration. Bluntly, the use of setup() and loop() with main() being hidden really bugs me.

If, however, they don't seem to be a great fit for your needs, there are several other small Arduino boards you can use instead, including the Micro (18 by 48 mm), MKR Zero (25 x 61.5 mm) and MKR ...

The code to do this project, Richardson says, was “really easy.” In fact, it was a mashup between two projects he found using Arduino code.

Once you learn how to read Morse code, you might want to teach your Arduino to understand it, too. Or, you can check out some other Morse-based projects.