Counters are of two types, up-counter (increment) and down-counter (decrements). Such counters find applications in day to day life such as, count the number of people entering a mall and the number of people exiting it to check it they are equal, count the number of vehicle crossing a toll plaza at a given time etc.
Now, here we proceed along to make a 0 to 99 counter based on an external event. This logic could be scaled up to implement a counter to any number of digits i.e. the concept can be extended to make a 0 to 9999 counter also.
This circuit can be used in various projects where we require the counting. Like in doctors’ clinic or hospitals, in restaurants, in customer care offices where long queue is there and we want to stop the rush at the counter.
This system is very effective where man power is less. In this you have to provide a token to the person and the person has to wait for its turn which can be displayed on the 7 segment display. With the help of this counter circuit we can maintain the silence and the person will also be informed about their turn.
Q1.Where we can use this project?
It is used for displacing count according to the sensors can be used in hotels,shopping malls and buildings. hospitals for displaying token number of patient, railway, airports etc. public places for displaying numbers.
Q2. Which sensor is use to detect a person ?
Ans2. LDR is use to detect a person.
Q3. Why LM358 IC is use in this project?
Ans3. LM358 is use in this project to convert analog output of LDR into digital output for microcontroller.
Q4.What is use of 4026 Ic ?
Ans4.IC 4026, a Johnson counter IC commonly used in digital display. It has a 5
stage Johnson decade counter with decoder which convert the Johnson code to a 7 segment