Blink an LED on Arduino — 60 seconds, no code
Drag two visual blocks. Plug in USB. Click Run. The built-in LED blinks. That is the whole tutorial.
No code needed
The blocks ARE the code. Drag `LED on pin 13`, then `Wait 1 second`, then `LED off`, then `Wait 1 second` — and you've written a blink loop.
Uses the on-board LED
Every Arduino Uno has an LED soldered to pin 13. You do not need a breadboard, resistor, or wires to do your first project — just the board and a USB cable.
Real hardware, not a video
The LED on your actual desk lights up. Not a YouTube simulation, not a GIF — the photons leave the LED in your room.
See it run
The editor is the real product. Open it and drag two blocks in — that takes ~30 seconds, no signup wall.
Open ArduinoStudioQuick answers
What do I need?
An Arduino Uno (or Nano / Mega — same idea), a USB cable that fits both the board and your laptop, and Chrome or Edge. That is it. No breadboard, no resistor, no wires.
Do I have to install the Arduino IDE first?
No. ArduinoStudio runs in the browser. The browser's built-in Web Serial talks straight to the board's USB port — no installer.
Why pin 13?
The Arduino Uno has a tiny LED soldered to pin 13 on the board itself. Sending HIGH to pin 13 lights that LED. No external parts required for the first blink.
What happens after the blink?
Slow it down (change Wait to 100ms). Speed it up (10ms). Add a second LED on another pin. The remaining 19 lessons walk through patterns, sensors, buttons, motors — same drag-and-drop editor the whole way.
ArduinoStudio
Control hardware from your browser
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