Build a Flip-Dot Display with Arduino Uno — Complete Controller 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.

Flip-dot displays are the satisfying, click-filled heart of retro train station signs and public art installations. Each pixel is a tiny mechanical disc that flops between two colours with a pulse of magnetism. This kit gives you an 8-dot playground to master that effect. You'll wire shift registers, Darlington drivers, and electromagnets into a responsive controller, then program patterns, numbers, or text on a display you can hear as much as see.

What You'll Build

You'll assemble and solder a controller board for eight electromagnets that flip magnetic discs on command. The Arduino talks to three cascaded 74HC595 shift registers, which fire TIP120 transistors to pulse each coil safely. The result is a solid, expandable core for a mechanical display — mount it behind a panel and you have a small physical sign that can show simple messages or even scroll letters.

What You'll Learn

• Multiplexing outputs with 74HC595 shift registers to drive 8 electromagnets from just a few Arduino pins
• Safely controlling inductive loads using Darlington transistors and flyback diodes
• Soldering a prototype board to turn breadboard wiring into a durable controller
• Programming Arduino to generate patterns, binary counters, and scrolling text on a mechanical display

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for intermediate makers moving beyond blinking LEDs to real-world output devices. It’s a perfect project for CBSE Class 11–12 students, B.Tech ECE/EEE learners, and ATL Tinkering Lab innovators exploring physical computing. It also fits Smart India Hackathon prototyping and the hardware groups at IITs, NITs, VIT, and BITS Pilani who want an electromechanical display with open-source control.

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.

Choose your assembly option:

• Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
• Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.