Bascially, I want to wire up a powered 4-port USB hub to be powered from the PSU. The hub is 5v and I would've thought a simple wiring to a molex will do, but someone told me that USB runs on -5v rather than +5v. Is that true? I'm not an electronics person and this goes right over my head tbh! Secondly, the hub is going to be connected straight to the motherboard, so I've found this: and such that This should work for connecting the hub to the motherboard right?
that should work. the red wire is +5v dc. my cousin who is a ******* an da self proclaimed computer guru actually claimed to my dad(in relation to usb powered laptop cooler) that you can't use usb for powering anything causee it has no power line in it
lol! So you're saying that USB uses +5v, and I should just plop the usb power cable onto the red and black of the molex?
Can't understand why you are using a USB motherboard header connection cable,a female to female usb adaptor and a usb hub connection cable when you can just plug the hub into a usb socket on the computer without wasting a usb header. It will work but why.
Because he wants more current from it, or wants to power it from the pc. Firstly, does the hub need external power at the moment? If it doesn't, you will not be able to draw more than 500mA in total from it because you will blow something in it. If it is externally powered, make sure it needs 5V (don't worry if it wants a bit more, just dismantle and take out the regulator) then you will have to connect the +5V line inside the hub to where the adaptor plugs in. This should be quite easy, just adding a wire. Then, connect the ground and 5v of the usb lead into the PSU, and connect the two signal pins to the motherboard. The reason you can't leave the PSu's 5V connected to the motherboards one, is that, well, complecated but may blow summat. Hope this is of some use to you
I don't want any wires hanging out the back of my pc, which I why I am using a mobo header to make everything internal. The hub doesn't have to have external power (a power cable is included), it is optional, but I've figured that if I'm going to have 3 wireless devices connected to the hub (wifi, bluetooth and infra-red) I'm going to need more power, so will use the external power, adapted to connect to a molex. It won't be drawing power from the mobo. The actual hub is this one here, but in black. I like your avatar! EDIT: Maybe I should've made clear in the first place that there is a power adaptor included with the hub, but is for optional use.
Then you will need an extra cable, a molex-to hub power lead, as i assume the port used to power the hub is not usb? My approach (which involves a little wiring) would mean it would look normal, only needing one usb lead to power and use the hub. It is probably worth checking how much current all the dievices draw with an ammeter, as it would be a shame to do all this for nothing. One last idea, if you hard-wired the wireless stuff to the port and put it in a bettter case, it would be a lot smaller and neater. You would'nt be able to switch periphals, but at that price? Thanks about the avatar
