Tutorial

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Tinkercad Circuits ā€” Virtual Arduino šŸ’”

šŸ§­ What is Tinkercad?

A free online simulator for Arduino circuits. You can code, wire LEDs, and test sensors ā€” all without real hardware!

Goal: create a blinking LED circuit online before we build the real one āš”

šŸ’» Start Building

  1. Go to tinkercad.com ā†’ Sign in or make a free account.
  2. Click Circuits ā†’ Create new Circuit.
  3. Drag an Arduino Uno and an LED onto the workspace.
  4. Add a resistor (220Ī©) between the LED and ground.

šŸ’¾ Add Code

  1. Click Code ā†’ choose Blocks + Text.
  2. Paste this simple blink code: 
    void setup() {
  pinMode(13, OUTPUT);
}
void loop() {
  digitalWrite(13, HIGH);
  delay(500);
  digitalWrite(13, LOW);
  delay(500);
}
  3. Click Start Simulation.
šŸ’” Want color? Change 13 to another pin and wire a different LED!

šŸ§Æ Quick Fixes

  • LED not lighting? Flip it ā€” long leg is positive!
  • Resistor missing? LED will burn out (even virtually šŸ˜…).
  • Wires not connecting? Zoom in and check connection dots.