DIY AC Power Meter Kit - Arduino Uno OLED Energy Monitor
Build a Home Appliance Watt Meter with Arduino Uno + OLED - Know Exactly What Your Appliances Cost to Run
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Plug in any home appliance - a fan, phone charger, or TV - and this Arduino-powered meter instantly reveals live watts, amps, and power factor on a crisp 0.96-inch OLED. Built around the PZEM-004T module, it's a real-world energy monitoring tool that demystifies electricity consumption. Perfect for anyone who wants to see exactly how much power their devices draw, right at the wall socket.
What You'll Build
You'll assemble a compact power monitoring station that uses the PZEM-004T sensor to read real AC parameters through a snap-on current clamp - no wiring into the mains is needed. The Arduino Uno processes the data and drives the OLED to display watts, current, voltage, apparent power, and power factor. The result is a portable, battery-free watt meter you can use around the house to compare appliance efficiency.
What You'll Learn
- Interface the PZEM-004T energy sensor using a serial protocol and interpret its AC measurements
- Program an Arduino Uno to read real power (watts), current (amps), voltage, and power factor
- Drive a 0.96-inch OLED display via I�C and format live data clearly
- Build a self-contained meter with a buck converter regulating power from a USB source or battery
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| PZEM-004T | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 100nF Caps | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
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 physics practicals, ATL Tinkering Lab sessions, and B.Tech ECE/EEE mini-projects where real energy metering adds immediate relevance. The 5-15 age span means younger makers can build it with an adult nearby while older students and hobbyists will appreciate the genuine AC measurements and clean OLED display. It also fits neatly into Smart India Hackathon prototypes or IIT/NIT/VIT/BITS lab demonstrations.
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 launch the AI companion trained for this kit. It walks you through every step. You can also message us on WhatsApp for fast troubleshooting from a real Compoden engineer.
Does the kit include the current clamp for the appliance?
Yes. The PZEM-004T module comes with a split-core current transformer (CT) that clamps around the live wire of the appliance, so no cutting of wires is required.
Do I need to solder anything?
No soldering is needed. All connections are made on the included 400-point breadboard using the male-to-male jumper wires. The whole circuit can be assembled and disassembled easily.
Is it safe for a 10-year-old to use?
The current clamp and PZEM-004T module are fully insulated and designed for non-contact AC measurement. With adult supervision to handle the mains plug, a 10-year-old can safely build and use this meter while learning about home energy.
PZEM-004T measures real AC power of any plugged appliance. OLED shows watts, amps and power factor.
What's in this kit
- Arduino Uno R3
- PZEM-004T
- 0.96in OLED
- LM2596 Buck Converter
- 100nF Caps x5
- 400-pt Breadboard
- M-M Wires x20
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