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Discussion in 'Microcontrollers, Programming and IoT' started by shadrackthox, Feb 22, 2012.

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  1. Feb 22, 2012 #1
    shadrackthox

    shadrackthox

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    Dec 10, 2011
    i want to count the number of persons entering/leaving a room and display the output on a 2x16 lcd display....i.e when one enters the room the counter is incremented and the opposite is true,..any help?
     
  2. Feb 22, 2012 #2
    donkey

    donkey

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    Feb 26, 2011
    there are device that do this already. they work of 2 infared beams positioned accross the door about 30cm apart. if you walk one way they send a signel to count up, if you walk the other they send a signal to count down. they have some mis fires but generally work well. will try to see if I can find one for you
     
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