Digital Voltmeter Ammeter Kit with Arduino Uno
Build Your Own Digital Voltmeter & Ammeter with Arduino Uno – Measure Voltage, Current, and Power
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 Arduino Uno into a real-time digital instrument that reads DC voltage and current, then calculates power—displayed on a bright 16x2 LCD. Whether you need a benchtop tool for future projects or a hands-on way to understand Ohm’s law in action, this kit puts theory into practice. You’ll engage with sensors, data conversion, and I2C communication while building a practical device you can rely on.
What You'll Build
A compact, self-contained digital multimeter that shows voltage, current, and power on a blue-backlit LCD. The ACS712 current sensor and a precision voltage divider feed analog signals to the Arduino, which computes everything and updates the display. Perfect for testing batteries, solar panels, or your own circuit prototypes.
What You'll Learn
- How a Hall-effect current sensor works and how to interpret its analog output for accurate current readings
- Building a voltage divider network to safely extend the measurement range of the Arduino’s ADC
- Programming the I2C protocol to drive a 16x2 character LCD with a backpack, reducing wiring complexity
- Calculating real power (watts) from instantaneous voltage and current and displaying it in real time
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ACS712 5A Current Sensor Module | 1 |
| 16x2 Character LCD | 1 |
| I2C Backpack | 1 |
| 100kΩ Resistors | 5 |
| 10kΩ Resistors | 5 |
| 100nF Capacitors | 5 |
| 400-point Breadboard | 1 |
| Male-to-Male Jumper Wires | 20 |
| 9V Battery Snap | 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
Ideal for CBSE Class 11–12 students exploring physics and electronics through practical measurement, B.Tech ECE/EEE undergraduates building mini-projects, and participants in Smart India Hackathon or ATL Tinkering Lab challenges. If you’re ready to move beyond blinking LEDs and start creating functional instruments, this is your next step.
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?
Simply scan the QR code to access the AI companion, which offers step-by-step debugging specific to this project. For additional help, reach out on WhatsApp and our team will guide you.
Can this kit measure AC voltage and current?
No, this kit is designed for DC measurements only. The ACS712 can sense DC current, and the voltage divider is for DC supplies. It will not provide accurate results with AC signals.
Do I need a multimeter to calibrate the readings?
The code includes calibration factors, so you can get started immediately. A multimeter is useful for fine‑tuning if your application demands extreme precision, but it’s not essential.
Is this suitable for a school science exhibition?
Absolutely. The finished device clearly demonstrates sensor integration, data processing, and display control—making it a compelling exhibit that judges and visitors love to interact with.
Voltage divider + ACS712 shows volts amps and watts on LCD.
What's in this kit
- Arduino Uno R3
- ACS712 5A
- 16x2 LCD
- I2C Backpack
- 100kΩ Resistors x5
- 10kΩ Resistors x5
- 100nF Caps 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