Hi!
The Examples are great to get started. Good job!
I found some mistakes though, and would like to post them here:
In this tutorial:
http://arduino.cc/en/Tutorial/Tone21. The text says "Connect one terminal of your speaker to digital pin 9", the example code also writes to pin 9.
But the comment in the code says "8-ohm speaker on digital pin 8" and the example-code in the arduino-SDK also uses pin 8. This could confuse beginners.
2. In this picture:
http://arduino.cc/en/uploads/Tutorial/arduino_speaker_photocell_bb.png The black wire on the left top side is unnecessary.
Regards
