The circuit can be used as a clock. In this circuit the counter will advance after one minute or after every one second depending on the value of resistor selected. It can be used while cooking or while doing exercise or by students preparing for competitive exams.This circuit is based on NE555 and CD4026, which is a Johnson counter IC commonly used in digital display. It has a 5 stage Johnson decade counter with decoder which converts the Johnson code to a 7 segment decoded output. It means input will be converted into numeric display which can be seen on 7 segment display. It can be used in various applications like in 7 segments decimal display circuit, in clocks, timer etc. Read more to find out how the circuit is built and how it works.

CD4026 is a Johnson counter IC commonly used in digital display. It has a 5 stage Johnson decade counter with a decoder which converts the Johnson code to a 7 segment decoded output. To put it simply, it will convert the input into numeric display and can be seen on 7 segment display or with LED. It can be used for displaying analogue value such as temperature with pic microcontroller or for counting objects.There is various other applications like in 7 segment decimal display circuit, in clocks, timer etc. Advantages of 4026 counter are : It contains counters and 7 segment decoded in one package, It can be easily interfaced with 7 segment types, Ideal for low power display, Operated at wide range of temperature from 5V to 20V and the biggest advantage of the 4026B counter IC is that it can drive a 7-segment display without needing a decoder driver IC.

Now a day’s self service system is available in most of the restaurants that informs the customer about the status of their order. A display screen is used to flash the order numbers on the screen.   The circuit is easy to assemble. It’s a simple technique whenever the order is ready the chef presses the switch and numbers are displayed informing customers to collect their order.  The syatem is helpful in two ways firstly removes the crowd at the counter and secondly saves the customer from unnecessary confusion. The circuits display the order number till 99 than again resets the counter. Therefore order numbers from 0 to 99. This circuit is based on 4026 IC which is a Johnson counter IC commonly used in digital display. It can be used in various application like in 7 segment decimal display circuit, in clocks, timer etc.

The circuit developed here will count the number of visitor entering or exiting from door of auditorium or hall or any other place. Depending on the interrupt from the sensors, the system identifies the entry and exit of the visitor. On the successful implementation of the procedure, it displays the number of visitor present in the room. Therefore it can be economically implemented in all the places where the visitors have to be counted and controlled. This circuit is good enough for only one person entering at a time. It will also give you visual indication of circuit with the help of LED. It is operated at wide range of temperature from 5V to 20V. The big advantage of the 4026B counter IC is that it can drive a 7-segment display without needing a decoder driver IC. It will count the number of visitor up to 99 which can be increased by cascading more 4026 IC.