Arduino and shift register

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CanaKit Raspberry Pi 5 Starter Kit PRO

ELEGOO Upgraded 37 in 1 Sensor Modules Kit

40 PCS 20 CM Breadboard Jumper Wires

HiLetgo 5pcs USB to Serial CH340 Module

Project Description

This Arduino project with code is a smart parking status display system designed to monitor and show the availability of parking spots in real-time. It leverages a 74HC165 shift register to read the statuses of multiple parking spots using minimal Arduino pins and displays the results on a 16x2 LCD screen.

Key Features

Real-Time Parking Spot Monitoring:
- The system can monitor up to 8 parking spots using switches, sensors, or buttons connected to the 74HC165 shift register.
- Each spot’s availability is represented as either:
  - X: Occupied.
  - Y: Available.
Efficient Pin Usage:
- The 74HC165 shift register reads the states of 8 parking spots using only 3 Arduino pins for control and communication:
  - SH/LD: Shift/Load Control.
  - CLK: Clock Signal.
  - SO: Serial Output.
Visual Feedback:
- A 16x2 LCD displays the parking statuses:
  - Row 1: Labels the parking spots (1|2|3|4|5|6|7|8).
  - Row 2: Shows real-time statuses (X|Y|X|Y...).
User-Friendly Design:

Compact, scalable, and easy to implement in real-world parking lots.
Minimal hardware requirements for efficient cost and power usage.

Schematic:

Connections:

Code:

How It Works

Parking Spot Detection:
- Each parking spot is connected to a parallel input pin (D0-D7) on the 74HC165 shift register.
- The sensors or switches indicate whether a spot is occupied (HIGH) or free (LOW).
Data Processing:
- The 74HC165 converts the parallel data from the parking spots into serialized data.
- The serialized data is sent to the Arduino via the SO pin.
Data Display:
- The Arduino decodes the data and updates the 16x2 LCD.
- The first row shows the spot labels, and the second row shows the availability status of each spot.
System Refresh:
- The system refreshes every 500 milliseconds, ensuring up-to-date information.

Applications

Parking Management:
- Ideal for monitoring parking lots in malls, offices, or residential complexes.
Smart Cities:
- Can be integrated into IoT systems for real-time parking availability tracking.
Scalable Design:

Additional 74HC165 registers can be daisy-chained to monitor more parking spots.

Or just get the project from this link:

https://drive.google.com/file/d/1fv0RsBjE6PtrPl0H1EH10LGr1X9X0lDe/view?usp=drive_link

Advantages

Efficient Pin Usage:
- Only 3 Arduino pins are required to manage 8 parking spots.
Real-Time Updates:
- Instant feedback on parking statuses displayed on the LCD.
Scalability:
- Can expand to handle more spots by adding additional shift registers.
Cost-Effective:

Uses readily available and affordable components.

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