Circadian Light Rhythm Logger Kit with Arduino Nano – Capture Your Daily Light Exposure

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

You wear a device that records every 15‑minute light reading for an entire week, then pull the SD card and chart the difference between sunrise‑driven natural light and the harsh blue‑dominated artificial light you actually live under. This isn’t a ready‑made gadget — you build the logger from the BH1750 digital sensor, a DS3231 RTC, and an Arduino Nano, learning the engineering behind circadian science while collecting your own real‑world dataset.

What You'll Build

A battery‑powered light logger that uses the BH1750 ambient light sensor to measure lux every 15 minutes, stamps each reading with date and time from the DS3231, stores everything on a microSD card, and shows instant readings on a crisp 0.96‑inch OLED. After a week, you open the CSV file to overlay natural daylight patterns with evening lamp and screen light — a personal circadian graph that makes the biology of sleep suddenly concrete.

What You'll Learn

• Wire, configure, and read a BH1750 I2C digital light sensor — including lux resolution and measurement mode selection
• Interface a DS3231 real‑time clock (RTC) to timestamp data precisely, even across battery swaps
• Log structured CSV data to a microSD module with proper file handling, avoiding data corruption
• Create a low‑power Arduino program that wakes every 15 minutes, records a sample, and sleeps again to last a week on a 9V battery

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11‑12 students picking an investigatory project that blends biology with electronics — measuring light exposure against sleep logs shows genuine scientific inquiry. ATL Tinkering Lab mentors needing a ready‑to‑assemble data‑logging module that doesn’t stall on component mismatches. First‑year B.Tech ECE/EEE students who want a sensor‑interfacing portfolio piece that goes beyond blinking LEDs, or Smart India Hackathon teams prototyping environmental‑wearable concepts where long‑term data reliability matters.

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.