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.

For those getting started with Arduino, there's a Language Reference Page available on Arduino's website if you need reminding of different commands. You'll also need to make sure you're using the ...

The Arduino Language Reference – I am constantly going back to this site to check on the finer points of some of the Arduino functions. I also can never keep in my head how many bits are in some ...