Voltage and Current Monitor Kit with Arduino Uno + LED
Build Your Own Voltage & Current Monitor with Arduino Uno, INA219 & 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.
Transform your curiosity about energy into practical skill with this Arduino-based monitor. Plug any 5-26V device—a solar panel, battery pack, or home appliance adapter—and instantly see its voltage, current, and watts on the sharp OLED screen. Perfect for young inventors learning the fundamentals of power and energy.
What You'll Build
A sleek, hand-held power meter that reads live voltage (V), current (mA/A), and total power (W) from any DC source. The 0.96-inch OLED display shows crisp white numbers, updating multiple times per second. You'll calibrate it once and then use it for years as your go-to diagnostic tool for batteries, adapters, and DIY home automation projects.
What You'll Learn
- How to interface the INA219 high-side current sensor with Arduino for accurate voltage and current measurements.
- How to display real-time sensor data on a 0.96-inch OLED screen using I2C communication.
- The relationship between voltage, current, and power (Watts), and how to calculate energy consumption.
- How to breadboard circuits confidently—no soldering required, perfect for beginners.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| INA219 Current Sensor Module | x1 |
| 0.96in OLED Display (I2C) | x1 |
| 4.7kΩ Resistors | x5 |
| 400-point Breadboard | x1 |
| Male-to-Male Jumper Wires | x20 |
| 9V Battery Snap Connector | x1 |
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
Young innovators (10-15 years) taking their first steps in electronics, CBSE Class 11-12 physics students exploring electrical measurements, and B.Tech ECE/EEE students who need a portable power monitor for labs and projects. Also ideal for ATL Tinkering Labs and Smart India Hackathon teams prototyping energy-aware IoT devices.
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 box to access your AI build companion, which has step-by-step guidance for this exact project. You can also reach our support team on WhatsApp for quick help.
Can I measure AC mains voltage with this kit?
No, this kit is designed for safe DC voltages between 5V and 26V only. Using it on AC mains is extremely dangerous. It’s perfect for batteries, solar panels, and USB-powered devices.
How accurate are the readings?
The INA219 sensor offers up to ±0.5% accuracy for both voltage and current when calibrated. A one-time calibration step is included in the build guide, and after that you can trust it for most DIY and educational measurements.
What if I want to monitor power over time for home automation?
The Arduino can be programmed to log data to a computer via serial monitor. Once you complete the build, you can extend the project with an SD card module or Wi-Fi module to send data to cloud dashboards—perfect for a home energy-monitoring setup.
INA219 measures supply voltage and current drain on any 5-26V circuit. OLED shows watts consumed.
What's in this kit
- Arduino Uno R3
- INA219
- 0.96in OLED
- 4.7kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- 9V Battery Snap
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