(5/17/2012) In P2: Noise Monitor/LED Bar Output, I could get the Microphone to work.
(5/17/2012) I tried P4/Detecting EMF, but I could not get it to work because i was using a small resistor(500 Ohm).
(5/29/2012) the Electromagnetic Interference detector project requires the use of external voltage supply, but I am missing the cable that connect to the battery power jack of the Arduino.
(5/17/2012) Because of lack of 4Char Display, i could not explore more the EMI detector project. All i could here was the variable noise from the speaker.