Aside from building circuits, Tinkercad also lets you paste the code for the Arduino and simulate the sketch to see whether your circuit works ... mini breadboard and LED to the more advanced ...

If you’ve done 3D printing, you’ve probably at least heard of Tinkercad. This popular CAD package runs in your browser and was rescued from oblivion by Autodesk a few years ago. [Chuck ...

There’s serial output under the source code, but it doesn ... and it would be a real winner. Tinkercad allows you to simulate Arduino, but not with the circuit sophistication of Falstad.