فيديو من SSSAMQ 97. صوت الصمت
The idea of this project is to simplify the process of car parking.There is a main switch (start button) to activate the entire circuit and another switch (stop button) for disconnecting the circuit. In each parking slot, there is a limit switch acting as a sensor to sense either the slot is empty or not. When the car comes and wants to enter to the parking area, IR sensor senses that the car is coming. So, the signal of IR sensor will be sent to the PLC which in turn sends signal to the entrance servo motor to open the arm gate. Now, let us assume that the car is parked in park-1-. The limit swich is activated and the LED will glow indicating that the slot is not longer empty. At the momemnt of activating the limit switch, a timer programmed by PLC counts how much time the car stayed at the parking slot. So according to that, the person should pay before leaving the parking area.There will be a counter besides the exit arm gate. This gate will not be opened till the user pays. Then only the exit arm gate can be opened. When the car leaving the parking area directly after the exit arm gate, there will be a limit switch acting as a reset button to reset the time again for park-1-. Hence that parking can be used again by another user. So this process is the same for all the parking slots

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