Probably one of the coolest Arduino projects out there is a remote-controlled car, but they're also one of the most daunting projects for beginners to undertake. However, you'll be glad to know ...

The thing about Arduino's I/O pins is that they come with special functions (and corresponding limitations) that beginners are generally unaware of. For instance, in the Uno board, pins D0 and D1 ...

The creators of the Arduino wanted to make things easy for beginners, so they designed the IDE in such a way that it adds this function for us “behind the scenes” as part of the compilation process.