Okay, here's the dilemma: I want to buy a USB cup warmer. (http://usb.brando.com.hk/prod_detail.php?prod_id=00012) Not so big of a deal right? The only problem is that I want to have some control over how it heats so I was wondering if there is anyway to change the outgoing voltage from your USB ports through a software or hardware interface. I have looked all over the web and haven't come up with any results. I would prefer a software solution but as I said hardware will also work. I may just be stupid and the solution is really easy. Anyway, thanks for any help, -Chris PS: Is it even possible to control voltage through a USB connection without hardware only software?