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Powering a Switch with your PSU?

B

bluey424

Guest
I'm about to put my game server in a new case, and one of the ideas I was toying with is mounting a 24 port switch inside the case with it. I was wondering how viable it was to power the switch from the computers power supply and how I would do that. The switch needs 7.5v dc .. can I do this with just a really beefy resistor or am I missing somthing? The power supply is a 480w antec truepower, and I've got some headroom to spare. As usual, any help is appreciated.

Thanks
 
Its 7.5 volts...you might be able to get off with the 7v trick, put the positive lead on the 12v and the negative lead on the 5v. This gives 7 volts.
 
DO NOT do that.

I would get a voltage regulator to handle the voltage drop. Just as cheap, but takes a bit of soldering. THere's like 6 connections to solder and that's it.
 
If you want an easier way to do it, try this. Get a rubber groomet from your local auto store thats a bit smaller than a pci slot cover. Cut a channel out of the pci slot so the groomet will fit in it without cutting all the way through. Put the ac adapter cable in the groomet, position your switch inside your case where you want, measure how much of the power supply wire you will need, slide the groomet up to that point, mount on pci slot cover and mount pci slot cover to case. Now your power supply can be run to a power plug and no need to modify your PSU :)
 
Originally posted by Tanis143
If you want an easier way to do it, try this. Get a rubber groomet from your local auto store thats a bit smaller than a pci slot cover. Cut a channel out of the pci slot so the groomet will fit in it without cutting all the way through. Put the ac adapter cable in the groomet, position your switch inside your case where you want, measure how much of the power supply wire you will need, slide the groomet up to that point, mount on pci slot cover and mount pci slot cover to case. Now your power supply can be run to a power plug and no need to modify your PSU :)
Click to expand...

good plan, do that ;)
 
i never thought about that, my psu has that second plug on it too, i guess you are supposed to power a monitor with it or something, but that would work good too if your switch has a normal computer type power plug :)
 
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