Code Lab

Write real Arduino code. Watch a real board react.

This runs actual C/C++-style Arduino code through a live interpreter — no physical board required. Pick a starter sketch, press Run, and press the button or move the slider on the virtual board while your code is running.

Deciding on hardware for your classroom? Read Arduino vs Raspberry Pi for Kenyan Schools.

Sketch editor
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Virtual Arduino Uno
UNO R3 LED 13 LED 9 (PWM) DIGITAL (PWM ~) ANALOG IN A0-A5

Onboard LED = pin 13 · External LED = pin 9 (PWM) · Button = pin 2 · Potentiometer = A0

🛒 Starter kit (board + breadboard) 🛒 LED pack 🛒 Push button 🛒 Potentiometer
Push ButtondigitalRead(2)
PotentiometeranalogRead(A0)
512
Add-on Components
TRAFFIC 5·6·7 BUZZER 8 SERVO 11

Traffic light = pins 5/6/7 · Buzzer = tone() on pin 8 · Servo = pin 11, angle 0°

🛒 Traffic light module 🛒 Piezo buzzer 🛒 Servo motor
Serial Monitor
// Output from Serial.print()/println() appears here.