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Does this exist ? Small fan resistor

post #1 of 10
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I want a molex to 3 pin female fan cable that will lower the 12v of my fans a little (maybe 10v). My computer is almost dead silent with 14 AP-15's, but I can still hear the small sound of air moving from every fan.
    
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post #2 of 10
i got two cables that can quiet it down for yea... just pm ur address and i can letter mail them tm for ya
post #3 of 10
wire a resistor to the power line?
post #4 of 10
10v regulator 7810

looks like a transistor, but regulates voltage

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/KA7810ETU/?qs=sGAEpiMZZMtUqDgmOWBjgF9615ElMAKywY1V1Jam1Cc%3d

you can try radioshack or other electronics store

simple to wire in
KA7810E-pinout.jpg
pin 1 = 12v (yellow from psu)
pin 2 = ground (black from psu and to fan)
pin 3 = 10v (red to fan)
Edited by ffejrxx - 8/20/11 at 11:46pm
post #5 of 10
i got some form natica's fan, but DAM they got hot and did not use them just rewire them are in post above me should help. expect temps to rise tho.
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post #6 of 10
Natica? Noctua you mean?

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post #7 of 10
Perhaps this Nexus NRC-1000 plus a regular Molex-to-3-Pin Female fan header?

NRC-1000 Link:http://www.svc.com/nrc-1000.html

Regular 4-pin Molex to 3-Pin Female adapter:
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&products_id=608

And, if you wish to go further down in voltage, perhaps you can just reconnect the wires to make the above into a 7v adapter.
http://www.techpowerup.com/articles/other/137
Edited by windfire - 8/21/11 at 12:22am
post #8 of 10
Does it have to be 10V? Would 7V do?

The reason I ask is because you can wire the fans to take just 7V from the PSU instead of the full 12V; you could even go down to 5V if you wanted..
You could try something like what they show here

Or you could get resistors and splice them into each wire for your fans... According to my math you would need a 43 Ohm resistor to drop the 12V line to 10V with the AP-15s. If you're gonna go this way; I would recommend getting some 1/4 Watt or even 1/2 Watt resistors that way they won't get too hot....

Hope this helps
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post #9 of 10
A thread on making resistors is here.

The resistor wires used for the Zalman ZM-F3 are now available individually. I'll try to find the link. The reason this is important is that the ZM-F3 draws 0.35 Amps, so that it has a fat resistor. The Noctuas draw only 0.1A, so other fans too easily make the resistor too hot. But with the Zalman drawing so much more, using other fans is usually not a problem.

Edit: Found it: ZM-RC56 (free shipping at SVC). 7V.

Edit: 10V resistor cable here. The example they use is a fan that draws 0.33A, so it should be able to handle most fans.
Edited by ehume - 8/21/11 at 4:43am
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post #10 of 10
Quote:
Originally Posted by ffejrxx;14660122 
10v regulator 7810

looks like a transistor, but regulates voltage

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/KA7810ETU/?qs=sGAEpiMZZMtUqDgmOWBjgF9615ElMAKywY1V1Jam1Cc%3d

you can try radioshack or other electronics store

simple to wire in
KA7810E-pinout.jpg
pin 1 = 12v (yellow from psu)
pin 2 = ground (black from psu and to fan)
pin 3 = 10v (red to fan)

Best suggestion here. Limiting current via a resistor usually leads to letting the smoke out.
    
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