Radioshack. They have a 12VDC plugin that allows you to select what voltage you want the output. The one that I have/had would output 4.5V and 6V. The 4.5V should be good enough.1) I'm accumulating all kinds of 5v devices, and im having troubles powering them. I have the crap 60w itx power supply that came with my case lying in my trunk powering my sb audigy nx and my 7port usb hub. This will not do forever. I cant find a 12v --> 5v step down regulator deal anywhere locally or online.
I have a router in my house that is 12VDC. I'm using a 5VDC AC-DC adapter on it and it's working just fine.