Fruit Battery Voltage Tester Kit with Arduino Uno
Fruit Battery Voltage Tester Kit with Arduino Uno — Compare Electrolytes with an LCD Meter
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Turn everyday fruits into tiny power plants and instantly see which one gives the highest voltage. This Arduino-based tester reads the electromotive force (EMF) from a lemon, potato, apple, or any fruit—then displays the result on a bright 16x2 LCD. It’s science class brought to life: chemistry, circuits, and coding in one hands-on experiment that even young builders can follow.
What You'll Build
You’ll assemble a dedicated voltage meter that uses the Arduino Uno’s analog input to read tiny currents from a fruit battery. Plug in zinc and copper electrodes, dip them into a lemon or potato, and watch the LCD show a stable voltage reading. Swap fruits and directly compare their electrolyte activity, learning why citric acid, starches, and other compounds affect output.
What You'll Learn
- How to build a basic electrochemical cell and understand electrode reactions
- Using analogRead() in Arduino to sample voltage from a fruit battery
- Connecting an I2C LCD backpack and displaying sensor data
- Designing a voltage divider with 10kΩ/100kΩ resistors for safe measurement
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | 1 |
| 16x2 LCD | 1 |
| I2C Backpack | 1 |
| 10kΩ Resistors | 5 |
| 100kΩ Resistors | 5 |
| 400-pt Breadboard | 1 |
| M-M Wires | 20 |
| Zinc and Copper Electrodes | 4 |
| 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
CBSE Class 11–12 students exploring electrochemistry, ATL Tinkering Lab participants preparing for science exhibitions, and young makers aged 8+ who want their first real Arduino project. Ideal for Smart India Hackathon junior ideas, science fair entries, and hobby clubs. No soldering—everything plugs into a breadboard so it’s safe even for primary schoolers under adult supervision.
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 talk to the AI companion, which knows this exact circuit and code. You can also message us on WhatsApp for a human reply within hours.
Which fruit gives the highest voltage?
Lemons typically output 0.9–1.0V, potatoes around 0.8V, and apples 0.5–0.7V. The kit lets you test any combination—try oranges, tomatoes, or even soft drinks to compare electrolyte activity.
Do I need programming experience?
No—the Arduino is pre-loaded with example code, and the AI companion explains every line. You can modify the sketch later to add features like low-battery warnings.
Can I use the kit to measure other low-voltage sources?
Yes, the voltage divider design allows safe measurement of any DC source up to about 5V. It's perfect for testing button cells, solar panels, or homemade chemical cells beyond just fruits.
Measure EMF from lemon, potato and apple batteries. LCD compares different electrolyte fruits.
What's in this kit
- Arduino Uno R3
- 16x2 LCD
- I2C Backpack
- 10kΩ Resistors x5
- 100kΩ Resistors x5
- 400-pt Breadboard
- M-M Wires x20
- Zinc and Copper Electrodes x4
- 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