Ro system

⚡ STM32 Reverse Osmosis Controller Board

⚠️ Status: Manufacturing Phase / Untested
This board design has been sent to fabrication and is currently untested in hardware. Use or manufacture at your own risk.

An ROC board designed to improve the performance of an RO system using STM32 and peripherals

🙏 Acknowledgments & References

• Credits: — Buck Converter. — Switching Regulator PCB Design - Phil's Lab #60
• Design Purpose: Learning power conversion, component placement, sensor and mosfet usage & personal use.

📋 Board Specifications & Features

• Microcontroller: STM32G0F6Px (TSSOP-20 Package)
• Power Supply: On-board Buck Converter (24V to 3.3V step-down) switching regulator network
• Connectivity: Screw Terminals for 24V power and peripherals
• Debugging & Flash: SWD (Serial Wire Debug) header
• Status Indicators: Power LED
• Design Tool: KiCad 10.0

⚙️ System Functions & Peripherals

• Input Voltage: $24\text{V DC}$ main power supply (stepped down to $3.3\text{V}$ for logic).
• Actuator Control (Low-Side MOSFET Drivers):
  • Inlet Solenoid: Controls feedwater inflow to the RO membrane.
  • Flush Solenoid: Handles periodic high-pressure membrane flushing.
  • Booster Pump: Drives high-pressure water delivery through the filter stages.
• Sensor Inputs (Filtered & Conditioned):
  • High-Pressure Switch: Detects full tank pressure to shut down pumping.
  • Low-Pressure Switch: Detects water feed loss to prevent pump dry-running.
  • TDS Sensor: Measures Total Dissolved Solids / water purity output.

📂 Repository Structure

ro-system/
├── .gitignore
├── README.md
├── LICENSE
│
├── hardware/                 
│   ├── ro-system.kicad_pro
│   ├── ro-system.kicad_sch
│   ├── ro-system.kicad_pcb
│   ├── bom.csv
│   └── manufacturing/         
│
├── firmware/                  
│   ├── Core/
│   ├── Drivers/
│   ├── .STM32CubeIDE/        
│   └── ro-system.ioc
│
└── docs/                     
    ├── ro-system.png
    ├── mcu_and_terminals.png
    ├── schematic.pdf
    └── switching_regulator.png