Digital Multimeter on LCD Kit with Arduino Uno
DIY Digital Multimeter Kit with Arduino Uno: Display Voltage, Current, and Power on LCD
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 an Arduino Uno into a fully functional digital multimeter that displays real-time voltage, current, and calculated power on a 16x2 LCD. Using a voltage divider and the ACS712 current sensor, this kit lets you measure DC circuits with precision—perfect for budding electronics enthusiasts and makers who want to understand measurement fundamentals.
What You'll Build
You'll assemble a compact measurement station that reads voltage up to 25V, current up to 5A, and automatically computes power in watts. All readings appear on a bright LCD screen, making it easy to test batteries, power supplies, and small circuits. The system is calibrated for accuracy and can be expanded with data logging or wireless monitoring.
What You'll Learn
- How to use a voltage divider to scale down voltages for Arduino's analog input.
- How to interface the ACS712 Hall-effect current sensor and convert its output to amperes.
- How to display sensor data on a 16x2 LCD using the I2C backpack for simplified wiring.
- How to calculate electrical power (P = V x I) in code and validate real-world measurements.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| ACS712 5A | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 100kΩ Resistors | 5 |
| 10kΩ Resistors | 5 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M 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
This kit is ideal for CBSE Class 11-12 students exploring practical physics assignments, B.Tech ECE/EEE first-year students building a mini-project, ATL Tinkering Lab participants learning sensor integration, or any hobbyist looking to create a reliable measurement tool without hunting for parts.
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?
Our AI companion provides step-by-step debugging; you can also reach out on WhatsApp for personalized assistance.
Can this multimeter measure AC voltage or current?
No, this kit is designed for DC measurements up to 25V and 5A. For AC, modifications would be required.
How accurate are the readings?
After calibration, voltage accuracy is within ±1% and current within ±2% for steady DC. Calibration instructions are included.
Do I need any other tools?
No, all components are included, and you’ll only need a USB cable (common in Arduino kits) to program the Uno. A multimeter for verification is helpful but optional.
Voltage divider and ACS712 together measure volts and amps. LCD shows V A and calculated watts.
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