XY Scatter Plot Correlator Kit: Build a Live Data Visualization Tool with Arduino Uno & DHT22

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

Environmental sensors generate streams of numbers — but raw data hides relationships. This kit turns your Arduino into a live statistical instrument that plots two sensor values as an XY scatter on a TFT screen and calculates the Pearson correlation coefficient in real time. Watch the r‑value tick upward as temperature and humidity move together, or flatline when pressure diverges. It’s a mini lab for anyone who wants to move beyond blinking LEDs and into data science on real hardware.

What You'll Build

A handheld correlation station that draws live coloured points on a 1.8‑inch display, each representing a paired reading from the DHT22 (temperature/humidity) and BMP280 (pressure/temperature). The Pearson r updates on the screen with every new sample, while the DS3231 real‑time clock stamps the data so you can log trends later. The build produces a device you can use to investigate weather patterns, test hypotheses in a science fair, or debug sensor cross‑talk.

What You'll Learn

• Interface multiple I2C and one‑wire sensors (BMP280, DS3231, DHT22) with Arduino Uno without address conflicts
• Program live XY scatter plots on the ST7735 TFT, including axis scaling, point colour, and coordinate transforms
• Compute the Pearson correlation coefficient using a floating‑point algorithm and display the r‑value on‑screen
• Log time‑stamped sensor pairs and analyse how correlation shifts over hours or days

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE Class 11–12 students investigating correlation in physics or computer science, B.Tech first‑year ECE/EEE students seeking a statistics‑heavy electronics project, and teams preparing for Smart India Hackathon or ATL Tinkering Lab challenges. It’s also used by hobbyists at IIT/NIT/VIT/BITS maker spaces who want a compact, real‑time data analyser.

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.