Build a Soil pH Tester with Arduino Nano – A Plant-Friendly STEM Kit

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

This kit turns a curious child into a pint‑sized agri‑tech engineer. Using an Arduino Nano, an analog pH probe, and a crisp OLED display, they’ll build a handheld meter that not only measures soil acidity but also suggests the best plants for that soil. It’s a hands‑on bridge between coding, electronics, and the garden, perfect for the budding scientist who wants tomatoes to taste better or roses to bloom brighter.

What You'll Build

A portable soil pH meter that reads acidity on an OLED screen and matches the value to a plant recommendation. After testing the three included soil samples, your child can take the device to any garden pot, flower bed, or school vegetable patch and instantly know if the soil is ideal for marigolds, blueberries, or even orchids. The finished gadget fits in a pocket and runs entirely on USB power.

What You'll Learn

• How to read an analog pH sensor and convert its signal into a meaningful number with Arduino Nano
• Programming an I2C OLED display to show real‑time pH value and plant advice
• The basic chemistry of soil pH and why certain plants thrive in acidic, neutral, or alkaline conditions
• Breadboard wiring, component interfacing, and troubleshooting a real electronic circuit

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Built for curious learners aged 10–12, this kit fits seamlessly into CBSE Class 7-8 science exploration, ATL tinkering lab activities, and early STEM workshops. It’s equally at home on a parent‑child weekend table or in a school’s innovation club. B.Tech first‑year ECE students who want a no‑fuss introduction to sensor integration will also find it a fast, rewarding build.

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.