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I actually found this method to work (look in the comments of the video because there is a minor adjustment that must be done to the usb for this to work) Hopefully this actually helps you all.
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How did you wire this so that the Arduino was able to provide power to the LED strip? Most common LED strips are 12V (I'm working with a 24V LED strip and a Texas Instrument TM4C which also outputs a max of 3.3V or 5V). The simple schematic at the end of the instructions will work fine because a single LED (which is a diode) will work once the forward voltage is surpassed (i.e. if the LED has a forward voltage of 0.7V, the Vin needs to be >0.7V for the LED to illuminate; the more diodes you add in series, the greater the forward voltage: two LEDs in series will require Vin > 0.14V for both to illuminate). So it's evident by the other commenters that the wiring requires clarification.