Simulate Arduino sequences in your browser
Build with visual blocks, watch the Virtual Board respond, and test loops and inputs before connecting a real Arduino.
See each step of your sequence
Follow the active block, watch LED states change, and adjust waits and loops. Simulated input controls let you try different readings before wiring a sensor.
Same project, real hardware
The project you build in the simulator is the one you press Play on with a real board, with no rewrite. Standard LED, servo, button, switch, potentiometer and photoresistor blocks run over USB direct with nothing installed; most other blocks need the Bridge desktop app on a real board, and a few don’t work properly on one yet.
Explore with the live demo
Open the live demo to explore a working project without an account. Sign in to create and save your own projects, and compare plan limits on the pricing page.
See it run
The editor is the real product — this opens the live demo on a working project. No account, nothing to install.
See it run — no account neededQuick answers
What does the simulator test?
It runs visual sequences block by block: pins switch on the Virtual Board, Waits pause execution, and a Check tests a simulated input. It is a sequence simulator; it does not model electrical current, resistor values, or every Arduino component. Check the components guide for the behavior of each block.
How accurate is the timing?
Wait blocks use the duration you set, but browser scheduling and hardware communication can add delays. Use the simulator to explore sequence order and pacing; verify timing-sensitive behavior on your physical board.
Can I see the simulator before signing up?
Yes. The live demo opens a working project without an account. Sign in when you want to create and save your own projects.
Does it support analog sensors?
Some. The photoresistor, potentiometer and proximity blocks get a 0–1023 slider on the Virtual Board that stands in for the reading. The thermometer, barometer, hygrometer and motion sensors are not simulated yet. On a real board, the photoresistor and potentiometer read over USB direct; most other sensors need the Bridge, and a few don’t work on a real board yet.