STM32F030F4P6 Microcontroller
TPS54360B Hydroponic 12V To 5V Regulator
Overview
A 12V to 5V step-down regulator utilizing the TPS54360B designed for hydroponic systems with a 3.5A continuous output capability.
Benjamin KoptíkSystem architecture
POWER
MCU
SENSOR
ACTUATOR
- POWER_ADAPTER → REGULATOR_TPS54360BPowerSupplies 12V DC input to the TPS54360B buck regulator
- REGULATOR_TPS54360B → MCU_SYSTEMPowerProvides regulated 5V power to the microcontroller
- REGULATOR_TPS54360B → SENSOR_LOADPowerProvides regulated 5V power to the sensor and output line
- REGULATOR_TPS54360B → ACTUATOR_HYDROPONICPowerDelivers up to 3.5A continuous 5V power to hydroponic system loads
- SENSOR_LOAD → MCU_SYSTEMI2CTransmits voltage and current telemetry data to the MCU
Bill of materials
| Part number | Type | Component | Manufacturer | Package | Qty | Datasheet | Match |
|---|---|---|---|---|---|---|---|
| SWI12-12-E-P5 | POWER | Standard AC/DC Wall Adapter 12V Provides 12V DC input power to the regulator module | CUI | — | 1 | Matched | |
14 alternatives consideredAI verified | |||||||
| TPS54360DDAR | POWER | TPS54360DDAR Step-Down Regulator Steps down 12V DC input to a stable 5V DC output with up to 3.5A continuous current | Texas Instruments | HSOIC (8) | 1 | Matched | |
8 alternatives consideredAI verified | |||||||
| STM32F030F4P6 | MCU | STM32F030F4P6 Microcontroller Monitors hydroponic system load status, voltage rails, and system control | STMicroelectronics | TSSOP-20 | 1 | Matched | |
7 alternatives consideredAI verified | |||||||
| INA219AIDR | SENSOR | Current and Voltage Monitor (INA219) Monitors output current and voltage to ensure stable power delivery to hydroponic loads | Texas Instruments | SOIC-8 | 1 | Matched | |
6 alternatives consideredAI verified | |||||||
| FT | ACTUATOR | Hydroponic System Loads (Water Pump / Valves) Driven or powered via the 5V regulated power rail for the hydroponic setup | Pulse Electronics | — | 1 | Matched | |
24 alternatives consideredAI verified | |||||||
Build guide
3-5 hoursIntermediate
1
Procurement & Preparation
- Procure all required BOM components including the SWI12-12-E-P5 12V wall adapter, TPS54360DDAR step-down regulator IC, STM32F030F4P6 microcontroller, and INA219AIDR current/voltage monitor.
- Prepare the custom PCB for the hydroponic regulator circuit, cleaning the surface with isopropyl alcohol and verifying all footprints for the TPS54360DDAR and STM32F030F4P6.
2
Hardware Assembly & Wiring
- Solder the TPS54360DDAR step-down regulator and its associated passive components (inductor, input/output capacitors, bootstrap capacitor, and feedback resistors) onto the power stage section of the PCB.
- Solder the STM32F030F4P6 microcontroller, INA219AIDR monitor, decoupling capacitors, and pull-up resistors for the I2C bus.
- Connect the Standard AC/DC Wall Adapter 12V output to the 12V_IN and GND power terminals of the regulator module.
- Wire the 5V_OUT and GND rails from the regulator output to the INA219 sensor, the STM32F030F4P6 microcontroller, and the hydroponic system loads (water pump and valves), while connecting the I2C interface (SDA, SCL, VCC, GND) between the INA219 and the MCU.
3
Firmware Setup
- Connect an ST-LINK programmer to the SWDIO, SWCLK, GND, and 3.3V/5V programming headers of the STM32F030F4P6 microcontroller.
- Compile and flash the firmware onto the STM32F030F4P6 to initialize the I2C peripheral, read voltage and current telemetry from the INA219, and control the hydroponic water pump and valves.
4
Testing & Calibration
- Power on the system using the 12V wall adapter and measure the regulator output voltage with a digital multimeter to ensure a stable 5V DC output under no-load conditions.
- Connect the hydroponic water pump and valves to draw a continuous load, and use an electronic load tester and oscilloscope to verify that the regulator maintains stable 5V output under a 3.5A load with acceptable ripple.
- Verify real-time telemetry by reading current and voltage values reported by the INA219 through the STM32F030F4P6 debug interface, calibrating offset errors if necessary.
Document
12V to 5V step-down regulator
A 12V to 5V step-down regulator utilizing the TPS54360B designed for hydroponic systems with a 3.5A continuous output capability.
Design Overview
| Item | Details |
|---|---|
| Product Type | 12V to 5V step-down regulator |
| Key Functions | Step down 12V DC input to 5V DC output, Provide up to 3.5A continuous output current using TPS54360B, Maintain stable power regulation for hydroponic system loads, Balanced thermal and EMC performance |
| Power Source | Standard AC/DC wall adapter (12V input) |
| Connectivity | |
| Size | Standard size with no strict limits |
| Environment | indoor |
| Difficulty | Intermediate |
| Est. Time | 3-5 hours |
System Architecture
Power Topology: Standard 12V DC wall adapter input feeds the TPS54360DDAR non-synchronous buck regulator, stepping down to a stable 5V output capable of supplying up to 3.5A continuous current for the microcontroller, sensors, and hydroponic system loads.
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| POWER_ADAPTER | POWER | Standard AC/DC Wall Adapter 12V | Provides 12V DC input power to the regulator module | 12V |
| REGULATOR_TPS54360B | POWER | TPS54360DDAR Step-Down Regulator | Steps down 12V DC input to a stable 5V DC output with up to 3.5A continuous current | 12V to 5V |
| MCU_SYSTEM | MCU | STM32F030F4P6 Microcontroller | Monitors hydroponic system load status, voltage rails, and system control | 5V |
| SENSOR_LOAD | SENSOR | Current and Voltage Monitor (INA219) | Monitors output current and voltage to ensure stable power delivery to hydroponic loads | 5V |
| ACTUATOR_HYDROPONIC | ACTUATOR | Hydroponic System Loads (Water Pump / Valves) | Driven or powered via the 5V regulated power rail for the hydroponic setup | 5V |
Key Components
5/5 modules matched to real parts. See the BOM tab for the full component table.
Standard AC/DC Wall Adapter 12V (SWI12-12-E-P5)
The candidate SWI12-12-E-P5 matches the exact part number searched for in the module description.
TPS54360DDAR Step-Down Regulator (TPS54360DDAR)
Candidate 1 directly matches the requested TPS54360DDAR part number.
STM32F030F4P6 Microcontroller (STM32F030F4P6)
The candidate STM32F030F4P6 directly matches the requested microcontroller part number and module description.
Build Summary
- Difficulty: Intermediate
- Estimated time: 3-5 hours
- Tools required: Soldering iron, Reflow oven, Digital Multimeter, Oscilloscope, Electronic DC load, ST-LINK V2 programmer
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: Design a 12V to 5V step-down regulator with TPS54360B