DC Microgrid Bus Voltage Controller Kit with ESP32 + LED
Build a Precision DC Microgrid Bus Voltage Controller with ESP32 and OLED Display
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
You will engineer a four-channel load monitoring system that actively trims buck converters to keep a 12V DC bus rock-steady under changing loads. This is the heart of a smart DC microgrid—ideal for solar-battery integration, IoT power management, and final-year engineering projects that demand real-time embedded control and data logging.
What You'll Build
This kit lets you assemble a fully functional DC bus manager with four independent current/voltage sensing channels, a multiplexed I2C backbone, and three software-controlled buck converters. You’ll create a miniature grid where the ESP32 reads sensor data, adjusts PWM duty cycles on the fly, and logs everything to a MicroSD card with RTC timestamps. The OLED display gives instant feedback on bus stability and individual load consumption.
What You'll Learn
- Precision multi-channel current and bus voltage sensing with INA219 modules
- Expanding I2C connections using TCA9548A multiplexer to connect four identical sensors
- Closed-loop digital control of LM2596 buck converters via ESP32 PWM for constant-voltage regulation
- Time-stamped data acquisition and logging to MicroSD with DS3231 real-time clock
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| INA219 | 4 |
| TCA9548A I2C Mux | 1 |
| LM2596 Buck Converter | 3 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| 100nF Caps | 15 |
| PCB Prototype Board | 3 |
| DIN Rail Enclosure | 1 |
| 24V 5A PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This advanced kit is built for third- and fourth-year B.Tech ECE and EEE students tackling power electronics or smart grid projects, Smart India Hackathon teams needing a reliable power management subsystem, and research scholars prototyping DC microgrid control algorithms. It’s equally suited for ATL Tinkering Lab mentors demonstrating closed-loop control and IIoT concepts at IITs, NITs, VIT, and BITS Pilani.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the kit box to open the AI companion trained on this exact microgrid project. It can guide you through wiring, I2C addresses, and PWM tuning. WhatsApp support is also available.
Can I scale this to monitor more than four loads?
Yes, the TCA9548A multiplexer supports up to 8 I2C buses. You can add additional INA219 sensors and buck converters by expanding the bus architecture, and the AI companion includes guidance on addressing and wiring.
Does the kit include the 24V PSU shown in the photos?
Absolutely. A 24V 5A power supply is included so you have a clean DC source for your microgrid right out of the box.
Is the source code for the ESP32 control loop provided?
Yes, the AI companion supplies a fully commented Arduino sketch that implements the closed-loop voltage regulation, INA219 multiplexed readings, OLED updates, and SD-card logging.
INA219 monitors multiple loads on 12V DC bus. Buck converters digitally trimmed to hold bus voltage constant.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items