I have recently seen the circuit diagram of an interesting concept in the page - Bidirectional Visitor Counter using Microcontroller.
I am planning to do this project circuit on next week with few modifications. If we arrange this circuit to a particular large room for any meeting, it helps to count the people entering or leaving the room. But, here if the same person enters and leaves the room for more than once, it adds that many number of +1's to the total count. As a result, I think it is not possible to get exact total count of the different people that enter the room.
So, my requirement is that it should count only when a new person enters or leaves the room. i.e. if the person enters or leaves the room for more than once, it should identify it and treat it as only 1. As a result we may get correct number of different people entered or left the room. I think you understood about my requirement.
So, are there any other devices have to be added to this circuit? I have already asked my friends about this, but no one has given the solution. So, Can anybody kindly suggest me the required modifications to be done in this circuit?