I found this great tutorial (see below), in it it describes fading LED strips. I’m curious can I run one of these LED strips out in say four or more IO pins? Or will I burn out my UNO and or USB port?
Thanks
It might if the strips are powered from the Arduino. It can only supply enough current for a handful of NeoPixels. If they are separately powered, the only limit is the ability of the software to handle multiple output pins for this purpose. The output pins only consume a tiny amount of power compared with the strips.
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If you wire things exactly as in the link you provided you will do just fine. In their first example using a RGB LED strip they use N Channel MOSFETS with 12 volt power. The circuit looks like this.
The digital IN/Out are your choice. The LED strip is a 12 volt LED strip. Not shown is it's a good idea to add a 1.0 K gate resistor between you digital out pin and the gates. Your ARduino has current limits on the digital out lines so we use the MOSFETs to handle the loads. Never exceed the load limits of any pin on any chip. 
Ron
You may want to add about a 1K resistor in series with the Gates, between your digital out and the gate. Those were omitted in my example drawing.
Ron
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