To design a car parking lot using Raspi, you will need the following components:
- Raspberry Pi (any model)
- Breadboard
- Jumper wires
- LEDs
- Push buttons
- Resistors
- LCD display
- Buzzer (optional)
Here are the steps to implement it using Python:
1. Set up the hardware components on the breadboard as per the circuit diagram. Connect the LEDs to the GPIO pins of the Raspberry Pi and the push buttons to the ground and GPIO pins.
2. Install the RPi.GPIO library on your Raspi by running the command `sudo apt-get install rpi.gpio` on the terminal.
3. Import the necessary libraries in your Python program, including the RPi.GPIO library, time, and the LCD library (if using an LCD display).
4. Define variables to store the values for the total parking slots available, number of cars currently parked, and a list to keep track of the occupancy of each parking slot, with 1 indicating occupied and 0 indicating available.
5. Create functions to increment and decrement the number of cars parked and to update the occupancy list accordingly.
6. Use a loop to continuously check the status of the push buttons and execute the respective functions when a button is pressed.
7. Implement a conditional statement to limit the increment or decrement of the number of cars parked based on the total available parking slots.
8. If using an LCD display, use the LCD library to display the current number of cars parked and available slots. You can also add a buzzer to sound when the parking lot is full.
9. Test the program by placing a car in a slot and removing it. The display should update accordingly.
10. (optional) If you want to make the program more sophisticated, you can use a distance sensor to detect when a car enters or exits a parking slot and automatically update the occupancy list.
This is a basic implementation of a car parking lot using Raspi and Python. You can further enhance it with additional features like a camera to monitor the parking lot, a web interface for booking and reserving parking slots, etc. Have fun experimenting!