Clock Sweep Kit: Build a Smooth-Sweep Analog Clock with Arduino Uno and Stepper Motor

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

Most DIY clocks tick loudly from a cheap quartz module. This kit flips that idea. You’ll program a stepper motor to sweep a clock hand like a luxury wall clock — silent, smooth, and accurate to the second because it reads time from a DS3231 RTC chip. By the time you power it on, you’ll have wired I2C communication, calibrated the 28BYJ-48 stepper’s 2048 steps per revolution, and turned a microcontroller into a true timekeeping device. Perfect for school science models, ATL Tinkering Lab displays, or a desk clock that actually teaches how time is measured digitally.

What You'll Build

You’ll assemble a circuit where the Arduino reads the exact hour, minute, and second from the DS3231 over I2C, then calculates how many stepper motor steps are needed to point the clock hand to that position. The 28BYJ-48 moves the hand in tiny 5.625° increments, so instead of jumpy ticking, you get a fluid sweep — exactly 60 discreet micro-movements per minute, creating the illusion of continuous motion. The final model can mount on a cardboard dial or acrylic face, and you’ll set the time once; the RTC’s battery backup keeps it running even after you unplug the Arduino.

What You'll Learn

• I2C protocol — talking to the DS3231 RTC and reading real‑time registers
• Stepper motor control — driving the 28BYJ-48 with a ULN2003 driver, half‑stepping for smooth motion
• Mapping time to angles — converting hours, minutes, seconds into motor step counts
• Arduino programming — writing a loop that updates hand position every second without drift

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This is a beginner-friendly project that fits CBSE Class 11–12 physics and computer science students exploring sensor integration, as well as B.Tech ECE/EEE first‑years learning embedded interfacing. It’s also a strong contender for ATL Tinkering Lab challenges — demonstrate a working clock that isn’t just a module but a finely controlled motor system. Hobbyists preparing for Smart India Hackathon health‑monitoring prototypes will appreciate the DS3231’s precise time‑stamping skills gained here.

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.