USB Power Line down / up for USB Ventilator

 I ordered the USB Relay and then Ventilator today. Lets hope for the best. Thank you all again for your advice :) .
Maybe you already know this, but to avoid cutting the fan (or your second power supply if you have a USB type one), take a look on eBay for cheap USB cables with the right sockets to cut up instead.

I mean things like this for the fan:

Thinking about it, a lot of USB type chargers have a detachable USB cable anyway. So the best deal might be a longer version of the one I linked, cut it into two parts and use both.
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