Going to Arduino site and just doing a search gave much discussion on pulseIn() see here http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1249891650 as an example
Going to Arduino site and just doing a search gave much discussion on pulseIn() see here http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1249891650 as an example