Project/mario.david (#1312)

* Create documentation for SmartCash project

Added detailed documentation for the SmartCash project, including architecture, motivation, log, hardware, and future improvements.

* Refactor project documentation for SmartCash

Updated sections for clarity and consistency, including Info, Description, Motivation, Architecture, Log, Hardware, Software, and Future Improvements.

* Update GitHub project link and links section

Removed placeholder text for GitHub project link and links section.

* Add flowchart for SmartCash system components

Added a flowchart diagram illustrating the main connections between components of the SmartCash system.

* Update SmartCash system architecture section

Removed the detailed flowchart and connections description for the SmartCash system architecture.

* Revise system architecture and functionality details

Updated the system architecture diagram and descriptions for the SmartCash project.

* Update schematics diagram for SmartCash project

* Enhance Bill of Materials with detailed component info

Updated the Bill of Materials section to provide more specific descriptions for components and added new items for better clarity.

* Update index.md

* Enhance project description for SmartCash

Expanded project motivation and goals for SmartCash, highlighting integration of hardware and software, future extensibility, and educational value.

* Enhance software library descriptions in index.md

* Remove 'optional' from I2C library description

* Finalizare documentatie

* Resize images

* Add files via upload

* Refactor SmartCash project documentation

Updated formatting and improved clarity in project documentation.

* Delete versioned_docs/version-acs_cc/project/projects-2026/smartcash directory

* Update website/versioned_docs/version-acs_cc/project/2026/mario.david/index.md

Co-authored-by: Omer Genan <81963672+genan2003@users.noreply.github.com>

---------

Co-authored-by: student <student@localhost.localdomain>
Co-authored-by: POPAGEORGEMATEI <119328898+POPAGEORGEMATEI@users.noreply.github.com>
Co-authored-by: Omer Genan <81963672+genan2003@users.noreply.github.com>

Author: 4 people

website/versioned_docs/version-acs_cc/project/2026/mario.david/comp.webp

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+# SmartCash - Intelligent Cash Register System
+
+A smart cash register with product scanning, real-time alerts, and business monitoring features.
+
+:::info
+
+**Author:** David Adrian-Mario  \
+**GitHub Project Link:** https://github.com/UPB-PMRust-Students/acs-project-2026-mariodavid3
+
+:::
+
+## Description
+
+SmartCash is an intelligent cash register system designed to modernize small retail operations by integrating product scanning, real-time alerts, and smart monitoring features.
+
+The system runs on a microcontroller platform and connects to a barcode scanner, display interface, and alert modules. It allows fast product identification, automatic price calculation, and detection of unusual events such as suspicious transactions, missing products, or system errors.
+
+The device features a display interface that provides clear and real-time information to the user, including product name, price, and total cost. Additionally, the system includes a buzzer and LED-based alert mechanism that notifies the operator in case of errors, invalid scans, or unusual activities.
+
+To enhance functionality, SmartCash can optionally communicate with a computer, allowing storage of transaction logs and management of product databases. This makes the system scalable and adaptable for more advanced retail applications.
+
+Overall, SmartCash improves efficiency, reduces human error, and provides a more reliable and user-friendly solution for handling transactions in small retail environments.
+
+## Motivation
+
+I chose this project because I am familiar with how markets and small shops operate, and I noticed that many systems are outdated and rely heavily on manual work. This leads to mistakes, slow service, and lack of control.
+
+The goal is to build a smarter cash register that improves efficiency, reduces errors, and provides real-time alerts. Additionally, this project allowed me to explore the practical side of embedded systems development by integrating both hardware and software components into a single functional system.
+
+Working with peripherals such as barcode scanners, displays, and communication interfaces helped me better understand how real-world devices operate.
+
+Another important motivation was the possibility to design a system that can be extended in the future. SmartCash can evolve into a more complex solution by adding features such as inventory management, cloud connectivity, or mobile integration.
+
+Overall, this project combines a real-world problem with a technical challenge, making it both useful and educational.
+
+## Architecture
+
+The system is composed of the following main components:
+
+- **Main Controller:** handles product processing, scanning logic, and alerts.
+- **Scanning Module:** reads barcode data and sends it to the controller.
+- **Display Module:** shows product information and total price.
+- **Alert Module:** uses a buzzer and LEDs for notifications.
+- **Power Module:** provides power to the controller and connected peripherals.
+
+All components communicate through the microcontroller, which acts as the central processing unit.
+
+## Project Log
+
+### Week 1 - 11 May
+
+Defined the project idea and the overall system architecture. The main components were selected and the basic functionality of the intelligent cash register was planned.
+
+### Week 2 - 18 May
+
+Started the hardware setup and tested the barcode scanner and display module. The connections between the controller, display, and external modules were planned and partially assembled.
+
+### Week 3 - 25 May
+
+Implemented the scanning logic and alert system. The buzzer and LED feedback were added for invalid scans, system errors, and user notifications.
+
+## Hardware
+
+The project uses the following hardware components:
+
+- Microcontroller board
+- Barcode scanner
+- LCD / TFT display
+- Passive buzzer
+- LEDs
+- Buttons
+- Breadboard
+- Jumper wires
+- Battery / external power source
+
+![Hardware Assembly](./comp.webp)
+
+## Schematics
+
+The electrical schematic was created in EasyEDA and includes the main controller, display, scanner interface, buzzer, connectors, and power connections.
+
+![SmartCash schematic](./schematic.webp)
+
+## Bill of Materials
+
+| Device | Usage | Price |
+| :--- | :--- | :--- |
+| Microcontroller | Main processing unit | ~50 RON |
+| Barcode scanner | Product scanning | ~70 RON |
+| LCD / TFT display | User interface | ~80 RON |
+| Passive buzzer | Audio alerts | ~10 RON |
+| LEDs | Visual alerts | ~10 RON |
+| Buttons | User interaction | ~5 RON |
+| Jumper wires | Connections between components | ~20 RON |
+| Breadboard | Prototyping connections | ~10 RON |
+| USB cable | Power and communication with PC | ~15 RON |
+
+## Software
+
+The software is responsible for reading scanned product data, processing product information, updating the display, and triggering alerts when needed.
+
+| Library / Module | Description | Usage |
+| :--- | :--- | :--- |
+| embedded-hal | Hardware abstraction layer | Communication with peripherals |
+| Display driver | Display control | UI rendering |
+| UART / Serial | Serial communication | Barcode scanner input |
+| GPIO | Digital input/output control | Buttons and LEDs |
+| PWM | Pulse-width modulation | Buzzer control |
+| SPI | Serial Peripheral Interface | Communication with display |
+| I2C | Inter-integrated circuit | Future extensions |
+
+## Links
+
+- [GitHub Project Repository](https://github.com/UPB-PMRust-Students/acs-project-2026-mariodavid3)