I would like to create a computer system that electronically detects the passage me to finish or arrival of one or more athletes in a foot race. For example, if I pass I must say "fabio22 is past," if it passes another I must say "dude is past." I know help?. Thanks in advance.
Sorry for my bad englsh, but I am italian.
This is my post in italian forum :
http://forum.arduino.cc/index.php?topic=225270.0