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Learn Arduino by building real circuits
Pin 13 → 220Ω resistor → LED → GND. Click the circuit to open it, change the code and add more parts.
Build your own
Start with an empty board, or open a ready project with the parts, wires and code in place.
New build: Arduino UnoAn empty canvas with the Uno.
New build: ESP32An empty canvas with the ESP32 board.
Simulation Gallery
Traffic LightAn RGB LED cycles red, yellow and green.
DoorbellPress the button and the buzzer rings.
Night LightThe LED turns on when the room gets dark.
Parking SensorBeeps faster as the car gets closer.
Ultrasonic RadarA servo scans while the sensor measures.
Temperature FanThe fan turns on when it gets hot.
Smart Door LockA button moves the lock and updates the screen.
DicePress the button to roll a number.
Project Gallery
Projects built with Arduino Lab, with their parts, wiring and code. Open one and press Run.
Finish a project, then press Publish on your assignment. It appears here with your name.
Learn step by step
Five levels. Each lesson explains a full sketch, asks a few questions, then you build a small project.
Level 1Arduino FoundationsFrom the IDE to a blinking LED.
Level 2ProgrammingNumbers that change, decisions, repeats and your own functions.
Level 3Electronics & InputsButtons, knobs, breadboards, resistors and sensors.
Level 4Outputs & AutomationSound, movement, switching big things, and a screen.
Level 5Robotics & IoTSensors that measure the world, and a robot that avoids walls.
For teachers
Make a class and share one join link. Give lessons, levels or projects as assignments, then mark the work out of 10.
Keep your progress
Sign in to keep your XP, streak and certificates on your account.