I'm thinking of installing low voltage wiring throughout my house. I'd like to use a pair of "dark" wires in my cat 5e cable; but I'm not sure how safe that would be. Right now, I'm thinking of buying a 5.5v high amp power supply and installing it into the closet. Then I'd run wires through the attic. Eventually, I could wire the whole house from that box to power all sorts of things. I'd like to get rid of the power bricks and put USB ports in my outlet plates. Almost all my gadgets are usb chargeable.
There are several projects I'd like to build for home automation. 5v would cover my gadget charging needs and most of my sensor projects; but it's not enough for everything.
It's troubling to me that not all devices run or charge on a DC standard voltage. I'm not sure what to do about it.