LED Driver Efficiency Mapper Kit with Arduino Uno + LED
LED Driver Efficiency Mapper Kit — Visualize Power Losses with Arduino Uno and OLED Plotting
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Uncover how much energy an LED driver wastes as heat — map its efficiency across a full current range using dual INA219 sensors at the input and LED junction. The OLED display instantly plots the efficiency curve, turning a complex electrical engineering concept into a clear, visual experiment.
What You'll Build
You’ll construct a working efficiency mapper that measures input power to an LED driver and output power delivered to the LED. By sweeping through different LED colors and drive currents, you’ll see the efficiency curve drawn in real time on a bright 0.96‑inch OLED screen. This kit equips you to test any small LED driver or resistor‑limited circuit and instantly judge its performance.
What You'll Learn
- Measure voltage and current simultaneously using INA219 sensors over I2C
- Calculate power input, power output, and efficiency percentage with Arduino code
- Handle I2C address conflicts and multiplex sensors with a TCA9548A mux
- Plot real‑time sensor data on an OLED display to visualize efficiency curves
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| INA219 | x2 |
| TCA9548A I2C Mux | x1 |
| 5mm LED Assorted | x5 |
| 0.96in OLED | x1 |
| 4.7kΩ Resistors | x5 |
| 100nF Caps | x5 |
| 400-pt Breadboard | x1 |
| M-M Wires | x20 |
| 9V Battery Snap | 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
This kit is ideal for CBSE Class 11–12 students performing physics practicals on electrical power, B.Tech first‑year ECE/EEE students grasping energy efficiency fundamentals, and ATL Tinkering Lab mentors introducing real‑world power measurement. Even hobbyists curious about driver losses will find the instant OLED plotting deeply instructive.
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?
Open the AI companion through the QR code and describe the issue. It’s trained on this project’s wiring and code, and you can also switch to a human helper over WhatsApp for tricky debug steps.
Can I test efficiency of any LED driver with this kit?
Yes, the dual INA219 setup measures power at the input and at the LED junction, so you can connect any low‑voltage driver outputting 0–26 V and up to 3.2 A and plot its efficiency curve. The included LEDs let you practice first.
Why are there two INA219 sensors? Can't one measure both input and output?
One sensor measures voltage and current at the driver input, the other at the LED junction. This gives true power loss across the driver itself — not just total power draw. Without the second sensor, you can’t compute efficiency accurately.
Will this kit work if I'm new to Arduino?
Absolutely, it’s a beginner‑level kit. The AI companion walks you through every code upload, wiring connection, and I2C multiplexer setup. You’ll have your first efficiency curve displayed within the build time.
INA219 at input and LED junction measures LED driver efficiency across current range. OLED plots curve.
What's in this kit
- Arduino Uno R3
- INA219 x2
- TCA9548A I2C Mux
- 5mm LED Assorted x5
- 0.96in OLED
- 4.7kΩ 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