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<blockquote data-quote="abhishgva" data-source="post: 1674121" data-attributes="member: 360630">Sure RadDave,Mac model: Macbook 15'' Retina 2014OS: Mavericks - 10.9.5What is attached to the USB port is a USB fan (<a href="http://www.amazon.com/dp/B003XN24GY/?tag=macforums0e4-20" target="_blank">link</a>)The fan runs at only 1 speed, and this default speed must by definition be it's maximum.I remember using LabView once on a windows based laptop to supply voltage in a sinusoidal pattern to a particular USB port. This allowed me to have an LED I had attached to it to grow brighter and then slowly dimmer and oscillate like that forever.So this leads me to believe that supplying a specific voltage to a USB port should be possible (within it's designed range of course).I haven't tried using LabView on my mac to solve this problem, and would much rather find an easier (lighter) method of doing so. Either through a pre-existing software, or to just be told which settings on my mac (wherever) I could possibly fiddle with to obtain the desired change in USB voltage output.Cheers,Abhishgva</blockquote>

[QUOTE="abhishgva, post: 1674121, member: 360630"] Sure RadDave, Mac model: Macbook 15'' Retina 2014 OS: Mavericks - 10.9.5 What is attached to the USB port is a USB fan ([URL="http://www.amazon.com/dp/B003XN24GY/?tag=macforums0e4-20"]link[/URL]) The fan runs at only 1 speed, and this default speed must by definition be it's maximum. I remember using LabView once on a windows based laptop to supply voltage in a sinusoidal pattern to a particular USB port. This allowed me to have an LED I had attached to it to grow brighter and then slowly dimmer and oscillate like that forever. So this leads me to believe that supplying a specific voltage to a USB port should be possible (within it's designed range of course). I haven't tried using LabView on my mac to solve this problem, and would much rather find an easier (lighter) method of doing so. Either through a pre-existing software, or to just be told which settings on my mac (wherever) I could possibly fiddle with to obtain the desired change in USB voltage output. Cheers, Abhishgva [/QUOTE]

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