RFID based car parking uses a microcontroller along with sensing circuits monitoring entry and exit of cars. The car owners are allowed an entry only when their RFID card is swiped .
The amount in the card automatically gets reduced with a display indication besides indicating the available number of parking. For loading the amount 2 push buttons are used SW1 for Rs500 and SW2 for 300.Example is shown for 2 cards but it can be extended to many numbers.
An H-bridge arrangement operates the entry and exit boom motors operating clockwise and anticlockwise for opening and closing. A buzzer sound comes while the card is swiped.
Upon every entry of a car the parking availability gets reduced by one number while every exit the number increases. A standard power supply is used. A seven segment display displays the status. A switch is used in place of RFID for minimizing the project cost.