Binary Clock Kit with Arduino Uno: Learn the Binary Number System Through a Functional LED Clock

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 show numbers but glowing lights you decode like a computer? This kit turns that idea into reality. You’ll wire 18 LEDs into six columns and program an Arduino Uno to read time from a precise DS3231 RTC module, then light up each column in binary-coded decimal. By the time it first starts ticking, you’ll already understand bits, nibbles, and the core of digital logic.

What You'll Build

A fully functional clock that displays hours (0–23), minutes, and seconds using six sets of LEDs. Each column represents one decimal digit of time, expressed in 4-bit binary. So 12:34:56 becomes patterns of on/off lights that you’ll soon read as effortlessly as digital numerals. The clock keeps accurate time for years, even if you unplug it, thanks to the DS3231’s backup battery.

What You'll Learn

• Convert decimal numbers to binary and vice versa using place values and LEDs
• Interface a DS3231 real-time clock (RTC) module with an Arduino Uno
• Control multiple LEDs with current-limiting resistors on a breadboard
• Understand how binary data represents real-world information like time

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is a natural fit for students in CBSE classes 6–10 learning the binary number system, ATL Tinkering Lab mentors introducing digital electronics, and young makers preparing for science exhibitions. It’s also a great choice for B.Tech ECE freshers who want a hands-on project before tackling complex circuits. Even hobbyists who enjoy unique desk clocks will find it satisfying.

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.