From the reel · 28 Oct 2026

Learn Arduino: a 3D Uno, free in your browser

Here's the app from the reel. You don't need to sign in.

In the app

You turn and tap the board, and each part tells you what it does. Sixteen lessons take you from meeting the board to building a project. It comes in thirteen languages, Spanish included.

Where to start

Open Blink an LED and hit Run. The LED blinks, and you see pin thirteen switch on and off. Then try Push a button.

It's a simulation. To build it for real, you need a real board.

Learn ESP32

The sibling app, from the same designer: twenty lessons for the ESP32 board.

Who made it

Dilum Sanjaya designed both apps. He's at x.com/DilumSanjaya.

We're building our own learning software for our kids. When they're older, this is where they go next.

— Champ