This DIY solar tracker project mimics this behavior using three simple main components: An Arduino UNO board, a servo motor (with ... closing the lid, an ultrasonic sensor in front of the bin ...

In the real world, missile systems use advanced radars ... targeting data for the launcher, an Arduino Uno uses an ultrasonic sensor pair mounted atop a servo. As the servo rotates, the returns ...

While these are undeniably pretty cool projects, you might not find them exciting enough to be your first-ever Arduino project, especially if they don't serve any immediate use to you at all.