I've wanted to power a 12V log through my PC for a long time; I don't currently have a variable voltage power supply so I finally had the motivation to look into using my desktop for power. Powering my log from my desktop is convenient for me seeing as my computer desk doubles as my vape station and is always on during the day. I can't leave my log at 12 volts all day and I'm too impatient to wait for it to heat up. Why not just buy a real vvps you might ask... because that would be too easy. I used an old fan and old fan speed controller. I cut off the 3 pin connector from the fan and I cut the tattoo connector (for lack of a better term) off of the power cord and used a wire nuts to connect the cables, I then hooked everything up and powered on my PC. Instant variable voltage... the vape performs just like it should at 12 volts. I hope to increase the max voltage on the rail powering the fan controller with a simple mod. It used to be common for people to step down their voltage for case fans to 7 volts by modifying the +5v rail, I plan on modifying -5v rail to bring the max voltage up to about 17 volts. I know this isn't great for my PSU but hey I wouldn't mind upgrading to a new fully modular one anyways if this one dies. Yes it is crude and the picture sucks, but I have all of 3 minutes invested in this so far. I will use a crimped connection and heat shrink in the future, so please don't tell me the wire nuts are unsafe... I know they are. If it isn't completely apparent, I have very limited knowledge concerning electronics. I mainly did this to decrease heat up times but I hope to use my PC as a primary source of power in the future. Sadly I wont have time to mess with this for another week or so. This mounts in a PCI slot, the back of my PC is more accessible for me. If I can get this to work out I'm going to get a new case and a 5.25" drive bay controller. Has anyone else attempted something similar? Comments/Suggestions? Better ways to go about this? Any insight is greatly appreciated.