Automatic Room light Controller with Visitor Counter (AT89S52)

ok i explain from room.gif
first the left side of AT89S52:
you see two sensors. sensors are connected in the following way on the entrance of door.
---> Entrance this way -->  --------
  S      S
  1      2
  --------

S1 is sensor 1 and S2 is sensor 2
555 timers gives high->low pulse whenever user crosses the ... Read Compelte post
Posted by ajay_bhargav on Tue Mar 04 2008, 10:36 pm

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