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Help powering fan LED's seperately

post #1 of 17
Thread Starter 
First off Hi all

I'm new here so be gentle...

I've been trawling the net trying to find info on rewiring a fan so that I can use a speed controller to control the fan voltage for speed. But seperate the LED's power supply so I can run them at full brightness regardless of fan speed.

Make sense? lol

Any ideas would be grand cos I got nothing
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post #2 of 17
Quote:
Originally Posted by ManOnFire View Post
First off Hi all

I'm new here so be gentle...

I've been trawling the net trying to find info on rewiring a fan so that I can use a speed controller to control the fan voltage for speed. But seperate the LED's power supply so I can run them at full brightness regardless of fan speed.

Make sense? lol

Any ideas would be grand cos I got nothing
I'm doing the same thing. Look at your case, see that LED on/off button on the to I/O pannel? I want to wire all my fans Like this.. then run all the fan LED's into one 3-pin fan connector and use the built in LED on off switch, just like the stock 140mm blue LED fan that comes with the case. Hope this helps
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post #3 of 17
I'm also doing this..
That guide is really helpful, thanks

Its even easier though if the fan already has LED's in it. Just cut the wires going from the LED into the fan and splice them together, and to the PSU with a 100ohms resistor.
    
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post #4 of 17
I can't find any fans that meet my req and have led's of the right color. I want 100CFM+ orange led fans
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post #5 of 17
Well then i would just get then fan and then add the LED's yourself.
    
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post #6 of 17
Thread Starter 
Quote:
Originally Posted by iCrap View Post
I'm also doing this..
That guide is really helpful, thanks

Its even easier though if the fan already has LED's in it. Just cut the wires going from the LED into the fan and splice them together, and to the PSU with a 100ohms resistor.
Cheers everyone, but this more the help I need...I'm not trying to add LED's to a fan. I have 2 coolermaster sickleflow's in the front of my case for intake and lighting. But my system is dead quiet and even running them at there lowest (almost a 1000rpm) the sickleflows stand out.

So I want to power the LED's in them seperately and then use my speed controller to quiet the fans down.

If I do this alone the LED's as good as turn off due to the low voltage...so...

iCrap, how easy is it to splice the wires to a molex and what will I need please?
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post #7 of 17
you need a molex connector, 100ohms resitor, and some extra wire.
Cut the LED wires that go into the fan, leaving them as long as possible. Splice the positive wires together and the negative wires together. Then connect them to your 5v molex with a resistor inbetween.

Il post a picture if you still need help.
    
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post #8 of 17
Thread Starter 
thanks iCrap...i'll give it a go when i have 5mins.

Would have saved me buying several different fans if i could have found this out sooner

80-100 ohm resister....but what watt? I can find many different ones

1+ Rep

By the way, if its not too much trouble a diagram would be kickass, but i'm sure i'll figure it out.

Thanks
Edited by ManOnFire - 5/4/11 at 10:57am
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post #9 of 17
I'm going to do it to one of my fans today, so i can show you a pic. its simple
You can use something other than a 100ohm resistor but i cant remember them right now... :/
    
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post #10 of 17
Thread Starter 
Cheers brother....your a living legend

I'll check it out after work moro and give it a go
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