Mini Arduino Traffic Light – Snap-Fit 3D
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A compact, press-fit traffic-light shell for Arduino demos and STEM lessons. Print, drop in three LEDs, and run the samp
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution
🚦 Mini Arduino Traffic Light – Snap-Fit STEM Model (Fresh Upload!)
Hey MakerWorld friends!
I just published my Mini Arduino Traffic Light design. It’s tiny, prints fast, and makes a perfect “wow” demo for classrooms, clubs, or your maker desk.
90 second build • 3D Printed Arduino Traffic Light
Why you might like it
Snap-fit assembly – no glue, no screws.
Choose 5 separate STLs or a single all-in-one build plate.
100 % open source (CC-BY-SA) – code & wiring on GitHub 👉 Repo link
Works with Arduino UNO or Nano – great for teaching digital I/O and timing.
Bill of Materials
Arduino, three 5 mm LEDs (R/Y/G), three 220 Ω resistors, a mini breadboard, and a handful of jumper wires. That’s it!
📸 If you print it, please share a “Make”! I’d love to see your photos, colors, or any hacks you add.
Got questions? Drop them below and I’ll answer as fast as I can.
💡 Bonus idea: tweak the delays in the sketch for a pedestrian-crossing sequence, or add a button to switch modes.
Happy printing and keep creating! 🔧✨