Project/alex mark.stan (#1036)

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* add project alex_mark.stan

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Author: MRK1717

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+# RC Car
+
+Remote controlled car using wireless serial communication.
+
+:::info 
+
+**Author**: Alex Mark Stan \
+**GitHub Project Link**: https://github.com/UPB-PMRust-Students/acs-project-2026-MRK1717
+
+:::
+
+## Description
+
+This project consists of building a remote-controlled car using wireless serial communication through the HC-12 module.
+
+A joystick is used as input on the controller side, sending commands wirelessly to the car. The STM32 NUCLEO board receives these commands and controls the motors accordingly.
+
+The system allows forward, backward, left, and right movement by controlling four DC motors through a motor driver.
+
+## Motivation
+
+I chose this project because it combines both hardware and software concepts, allowing me to learn about wireless communication, motor control, and processing analog inputs.
+
+It is also a practical project that can be extended later with additional sensors or control features.
+
+## Architecture 
+
+![Block Diagram](./block_diagram.svg)
+
+The system is composed of two main parts:
+- Controller side: joystick module and HC-12 transmitter
+- Car side: HC-12 receiver, STM32 NUCLEO board, motor driver, DC motors, and battery pack
+
+The joystick generates analog input values. These values are converted into movement commands and transmitted wirelessly through the HC-12 module. The STM32 receives the commands and sends control signals to the motor driver, which drives the DC motors.
+
+## Log
+
+### Week 20 - 24 April
+Chose the project idea and analyzed the system architecture. Studied the components required for building the RC car, including the STM32 NUCLEO board, HC-12 module, and motor driver.
+
+### Week 25 - 28 April
+Researched communication between controller and car using the HC-12 module. Planned the hardware setup and started preparing the initial documentation.
+
+## Hardware
+
+STM32 NUCLEO-U545RE-Q board: Responsible for receiving commands and controlling the motors.
+
+HC-12 Wireless Module: Used for wireless serial communication between the controller and the car.
+
+Joystick Module: Used to generate movement commands based on user input.
+
+L298N Motor Driver: Controls the speed and direction of the DC motors.
+
+DC Motors: Provide physical movement for the car.
+
+Battery Pack: Provides power for the car components.
+
+### Schematics
+
+TBD
+
+### Bill of Materials
+
+| Device | Usage | Price |
+|--------|--------|-------|
+| [STM32 Nucleo U545RE-Q](https://www.st.com/en/evaluation-tools/nucleo-u545re-q.html) | The microcontroller | [110 RON](https://ro.rsdelivers.com/product/stmicroelectronics/nucleo-u545re-q/stmicroelectronics-nucleo-u545re-q-stm32-nucleo/1899566) |
+| [Chassis Kit](https://www.pololu.com/category/2/motors) | The base for the car | [48.40 RON](https://www.emag.ro/) |
+| [HC-12 Wireless Module](https://components101.com/wireless/hc-12-wireless-module) | Used for wireless communication | [20 RON](https://www.emag.ro/) |
+| [Joystick Module](https://components101.com/modules/joystick-module) | Used for user input control | [20 RON](https://www.emag.ro/) |
+| [L298N Motor Driver](https://components101.com/modules/l298n-motor-driver-module) | Used to control the motors | [10.84 RON](https://www.emag.ro/) |
+| [DC Motors](https://www.pololu.com/category/2/motors) | Used for movement | [4 x 15 RON](https://www.emag.ro/) |
+| [Battery Pack](https://components101.com/batteries/18650-lithium-cell) | Power supply | [30 RON](https://www.emag.ro/) |
+
+## Software
+
+| Library | Description | Usage |
+|---------|-------------|-------|
+| [embassy-stm32](https://github.com/embassy-rs/embassy/tree/main/embassy-stm32) | Hardware interface | Used as the base library for controlling STM32 peripherals |
+| [embassy-time](https://github.com/embassy-rs/embassy) | Timing utilities | Used for delays and timing control |
+| [embedded-hal](https://github.com/rust-embedded/embedded-hal) | Hardware abstraction traits | Used for portable embedded hardware interfaces |
+
+## Links
+
+1. https://components101.com/wireless/hc-12-wireless-module
+2. https://components101.com/modules/l298n-motor-driver-module
+3. https://components101.com/modules/joystick-module
+4. https://www.st.com/en/evaluation-tools/nucleo-u545re-q.html
+5. https://github.com/embassy-rs/embassy