Bidirectional Visitor Counter:-

A digital visitor counter is a reliable circuit that takes over the task of counting the number of Persons Visitors in the Room very accurately. When somebody enters the Room then the Counter is incremented by one.
Using this circuit, we can count the number of people coming or going into a room. And it can also be displayed on any screen. We can also make it using 8051 micro-controller

How Bidirectional Visitor Counter works:-

The total number of persons inside the room is displayed on the seven segment display module. The microcontroller does the above job it receives the signals from the sensors, and this signals operated under the control of software which is stored in ROM. It can be used to count the number of persons entering a hall in the up mode at the entrance gate. In the down mode, it can count the number of persons leaving the hall by decrementing the count at the exit gate. It can also be used at gates of parking areas
and other public places.

Advantages of Bidirectional Visitor Counter:-

1) This model can be implemented as an automated switch to increase energy efficiency.
2) The model can be applied at the entrance of a room to operate the lights and other appliances.
3) When the count of people is zero in a room, the circuit will automatically put off the power supply and thus
conserving the use of electricity.
4) It will greatly help the physically challenged people.
5) It is easily operated and not complex like a micro-controller.

The disadvantage of Bidirectional Visitor Counter:-

Sujjection and Conclusion:-
a novel architecture for an economic bidirectional VisitorCounter and room lighter controller is proposed and implemented in this paper. It gives a basic idea of how to control the bidirectional visitor counter and room light counter using Arduino Uno and Arduino(IDE). The cost of this technology is very economical. This project uses low cost off the shelf components and is based on the Arduino platform which is FOSS(Free Open Source Software). So the overall implementation cost is very cheap and is affordable by a common person. This lowcost system is designed to improve the living standard and complexity of visitors counting. It provides accurate data and eliminating the error.