Wind Simulator with USB Fan's controlled by SimTools?

Firstly, when you use an arduino with Simtools it will always be connected to your computers USB. So you don't need a separate power supply for the arduino since it will always have USB power. Secondly, an arduino's pins can only handle around 40ma so you can't run a fan motor directly from them. Therefore, you will also need a motor driver (h-bridge) connected to the arduino that can handle the motors current draw. The motor driver itself is powered by its own separate power supply and that will supply the correct voltage and enough current to run the motor(s) you have chosen to use.

And if I only use 2*12cm computer fan's with 1A max for each?
Thanks again.

So it's not possible to forward/exploit the extra current drawn by the AC/DC through the Arduino to the MonsterMoto?
Total noob in electronic, I really would like to learn, so thank you again for the time given and the replies

Then yes, a 12v 6amp adapter would supply enough power since that's only a 2A draw.

You may be able to power both the arduino and h-bridge from one adapter without problems but you would connect both of them directly to the adapter. But again you don't need to power the arduino when its connected to a USB port.

So, the AC/DC (with a plug) that I posted earlier is pointless, and anyway I'll have to make a soldering... another thing to experiment...
Thanks again for your dedication