Technically, the extras in the Arduino Basic Kit aren't anything a savvy consumer couldn't order piecemeal, but there's something nice about having everything ready for you in one place.

The Arduino Beginner Course is available for just $19 in the Geeky Gadgets Deals store, a saving of 81% off the normal retail price of $101.

Thankfully, Arduino forum member Romano d'Ezzelino has put together a series of reference cards that show the basics of a number of common connections.