The Serial Call and Response example needs a bit of editing... I tried, but was told I had insufficient privilege.
The URL is....http://arduino.cc/en/Tutorial/SerialCallResponse
One thing may be Just Wrong: The upper, pictoral, diagram shows only two connections from the potentiometers. Surely three are needed, as shown in the circuit diagram?
The other problems are "trivial" if you know what you're doing, but unnecessary hurdles to the people I would assume the pages are meant for....
I would not suggest that anyone should go to all the trouble of re-doing the artwork, but perhaps some simple text notes could clear up the following....
(a- the third wire needed(?) from the pots)
b- the "Blobby things" hanging down ARE potentiometers.... I thought they were microphones or maybe piezo sensors when I looked at them
c- The diagrams show TWO sources of an analog value. The programs use THREE analog inputs.
Hope someone with editing privileges will take this on, and add a "done" note to this thread.... unless someone else adds a "not needed" note first! Maybe I've misunderstood what is presented on the page cited.