Visitor counter is based on popularly known 4026 decade counter and divider IC with 7 segment displays to display the number of visitors. In this circuit we are using LDR as a sensor for sensing the visitors with few more components. CD4033 is a Johnson counter IC commonly used in digital display. It contains 5 stage Johnson decade counter with decoder which converts the Johnson code to 7 segment decoded output. It means it will convert the input into numeric display which can be seen on 7 segment display or with the help of LED's. It can be used for displaying analogue value, such as temperature with pic- microcontroller, and can be used for counting objects. In this, counter will advance on receiving a high at its clock pin (pin 1).
Fig. 1: Prototype of Circuit on Breadborad Showing working of Visitor Counter