Uno A real simulator
It solves the actual circuit, so a bigger resistor really does make an LED dimmer.
About Uno Maker Lab
Where young makers
learn by building.
Uno Maker Lab teaches kids electronics with the Arduino Uno. Every project is built twice: first on screen, where mistakes are free and the simulator explains them, then for real with a kit on the desk.
Who it's for
Made for kids, easy for grown-ups
Kids, 8 and up
Short projects, big buttons, blocks instead of typing, and a voice that reads each step. No electronics knowledge needed.
Parents
Make accounts for your kids with a simple username, and see which projects they've finished and which parts they have, from your dashboard.
Clubs and classes
Everything runs in the browser, so there's nothing to install on school computers. Each learner's progress is saved to their account.
What makes it different
Not a game. Real electronics.
Real Arduino code
Blocks become the same C++ the Arduino IDE uses, compiled by the official Arduino compiler.
Your real board
The virtual Uno matches the blue board in the kit, pin for pin, and uploads over USB from the browser.
Safe mistakes
Warnings catch missing resistors, short circuits and backwards parts before they happen on the desk.
Questions
Good to know
Do I need to buy anything to start?
No. You can build and test all 12 projects in the simulator for free. A Uno starter kit is only needed when you want to build a project for real.
Which browsers work?
Everything except uploading works in any modern browser. Uploading to a real Uno needs Chrome or Edge on a computer or Chromebook, because they can talk to USB devices.
My kid doesn't have an email address.
Create a parent account, then make your kid's account from your dashboard with a simple username and password. No email is needed.
What happens to my kid's data?
We only save what the lab needs: their name, sign-in details, circuits, code and progress. It's never shown to other families, and a parent can clear it or switch the account off at any time.
My board isn't showing up when I upload.
Blue clone boards use a CH340 USB chip. On Windows it needs a free driver, installed once:
- Download CH341SER.EXE from WCH, the chip's maker (download page). Works on Windows 11, 10, 8 and 7.
- Open it and click INSTALL. Windows asks for permission, so a grown-up may need to help.
- Unplug the Uno, plug it back in, and choose
USB-SERIAL CH340 (COM…)when you upload.
Mac: macOS 11 or newer has the driver built in. On macOS 10.15 or older, get the Mac driver from WCH. Chromebooks and Linux need nothing.
Still not showing? Close the Arduino IDE, and try another USB cable: some cables only charge.
Questions or ideas?
We'd love to hear what you build.