Object counters are widely used devices. They are used at different places for different purposes and different usages. They can be used as visitor counter, vehicle counter material/product counter etc. Some of the examples where object counters can be used are: It can be used in LIFT to count and display number of persons inside the lift at a particular given time. The Object Counter can also be put to use in any big super market or shopping malls as a visitor counter, to keep track of the number of visitors who have visited the Mall, on the conveyor belt in the industry to count number of objects passed and in parking lots to count and display number of vehicles inside the parking lot.Thus the application areas are varied where object counters are used.
The circuit presented here counts from 00 to 99 and displays it on two seven segment displays. It can work as free running counter in auto mode or it can count manually when button is pressed. In auto mode it gets continuous pulses and counts continuously at a rate of 1 Hz. That means the count is updated at every second or in other words counter displays time in seconds. This counting rate can be changed by changing pulse frequency. In manual mode, the count is incremented when push button is pressed manually. So it can be used to count up to 100 (from 0 to 99) as per manual requirement.The counter circuit is made up of decade counter cum display driver chip CD4026. The pulse circuit is build using IC555. The circuit can be used in many applications like object counter, frequency counter, RPM counter, stop watch timer, token count display and many others.