Build a Lunar Phase Clock That Shows Moon Emojis — Arduino Uno + OLED 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.

What if your clock didn’t just tell time but revealed tonight’s lunar phase with a friendly moon emoji? This kit brings the cosmos to your desk: an Arduino Uno and DS3231 real-time clock compute the exact moon phase, and a crisp OLED screen displays its name and a tiny phase diagram. Perfect for young space enthusiasts, school astronomy clubs, and anyone curious about the night sky.

What You'll Build

You’ll build a stand-alone lunar phase clock that pulls the current date from the DS3231 RTC, converts it into the moon’s phase, and shows both the phase name (New Moon, Waxing Crescent, etc.) and a small graphic on the 0.96-inch OLED. Power it with a 9V battery, and it runs anywhere—from your study desk to a science fair exhibit.

What You'll Learn

• How a real-time clock (RTC) keeps accurate time even without power
• I2C communication between Arduino, RTC, and OLED display
• Converting calendar dates into moon phase algorithms
• Displaying text and custom graphics on an OLED screen

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Young astronomy lovers aged 5-15 who want to connect their interest in space with real electronics. It’s an ideal project for CBSE Class 11-12 students exploring microcontroller-based science models, ATL Tinkering Lab activities, and Smart India Hackathon junior challenges. Also great for B.Tech ECE/EEE students prototyping lunar cycle simulations.

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.