computer fans for hood

E

EnFuego

Member
How do you power these? I found some that are pretty much silent at a store today, but they weren't plug-in-able. In order to plug them in, I would have had to buy a $40 converter, plus the fans which were $25. Does this sound right, or is there another way to power them for cheaper? I don't mind dropping $25 on the fans because they really were silent, but the power converter seems a bit steep.
 
you got an old computer laying around? Use the supply from that....if not then just buy an old PC for $10 bucks from somewhere....
 
CPU/Terminal/Keyboard

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Reply to: sale-256013737@craigslist.org
Date: 2007-01-01, 12:21PM CST


I have an older system , 386, circa, 1995. Free to first caller


Location: Dallas, TX

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Why cant you use a old small power supply from an old cell phone or device as such? I have used them before you just have to make sure they can handle the number of fans in use or use multiple supplies.
 
you can use that also.....just make sure that are the correct watt, amp etc....
the guy just didnt want to spend $40.00's........
jeezz....just trying to save a brother some money......
LOL.
 
ya, but most of us have those old small power supplies laying aroung or you can find them at a swap,thrift store, goodwill, etc... for about a buck believe me I've done it and they have many difeerent sizes no need to pick up a new one
 
Thanks guys, I appreciate it. So its possible that an old cell phone charger may work if its the correct watt, amp? Thanks again for the help. I'm pretty incompitent with this stuffy, but I'm wanting to learn for future reference.
 
NO it is not OK to just use an old cell phone charger. You need a AC/DC converter that puts out 12 volts. you also need to make sure you don't exceed the maximum wattage of the converter.
 
supertech.....you are right ....
FYI....I also have about 20 barebone systems in my garage....so I have that stuff laying around also.
EnF....I personally would use the PC supply...it will allow for greater expansion (i.e. you could add 20 fans )....whereas, on the other option, you will need one per fan.....just some random thoughts
 
depending on the supply rating, alot of the smaller ones like on cell phones will like you stated handle one or two, but I have purchased some that will handle more than that, but like your suggestion (burntoutreefer)if you plan on running quite a few than one large supply supply might be a better option since we all know how many plugs we already have on our systems
 
<a href=showthread.php?s=&postid=8907926#post8907926 target=_blank>Originally posted</a> by BurntOutReefer
supertech.....you are right ....
FYI....I also have about 20 barebone systems in my garage....so I have that stuff laying around also.
EnF....I personally would use the PC supply...it will allow for greater expansion (i.e. you could add 20 fans )....whereas, on the other option, you will need one per fan.....just some random thoughts
Click to expand...

The only problem with that is I would have a computer sitting in my living room, and its already cramped as is...or is there a way to do it without having a computer tower sitting next to me stand.

Thanks again for the help (and looking on craigslist). As you can tell, I'm quit innept when it comes to anything electrical.
 
The power supply for the computer is held in by four 1/4" screws and is eaily removed from the case. Just make sure that you protect it from water damage.
 
Note that if you get an ATX power supply (last 10 years) you'll need to jump the green and any black wire on the motherboard plug to get it to come on. If it's an AT power supply (over 10 years) it'll have its own hard switch you can use.
 
<a href=showthread.php?s=&postid=8911789#post8911789 target=_blank>Originally posted</a> by spider86
Wmart sell adjustable converters for about 10 bucks. Cut off the plugs and your set. Thats what I did.
Click to expand...
Same here. Why do something so difficult like using a bulky PC PS? The Little brick PS from Walmart works great. I'm running (4) 92mm fans @ 9v off one.
 
<a href=showthread.php?s=&postid=8911789#post8911789 target=_blank>Originally posted</a> by spider86
Wmart sell adjustable converters for about 10 bucks. Cut off the plugs and your set. Thats what I did.
Click to expand...
What do these adjustable converters look like, and in what section of the store to they stock these items? I'm interested in getting one, but finding odd items in Wal-Mart can be near impossible.

I have an old computer fan that only has two wires coming out of it, and I saw some new computer fans in Circuit City earlier today that had four-pin connectors on them . . . will I be able to use one of these adjustable converters on them?

More info on how to modify these computer fans to work in a canopy would be much appreciated, thanks.
 
Computer fans are designed to run at 12v, but many can be run at 7v and some can even run at 5v. You'll see that some fans have the 4-pin molex connectors which are easily connected to a computer PSU without cutting or soldering. If you want to run the fan on an adapter instead, cut off the connectors and solder the power and ground.
 
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