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Can I controller these fans??

post #1 of 7
Thread Starter 
I just got this fan splitter LINK and was wondering if it is possible to control the speed of all the fans by lowering the voltage to the splitter. It is powered by a 3-pin connection but comes with a 3-pin to molex connection to power it from a molex.
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Baby Blue
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post #2 of 7
Thread Starter 
Also, is it possible to change the title of a thread?
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Baby Blue
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post #3 of 7
Thread Starter 
I am thinking I can lower the voltage somehow??
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Baby Blue
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post #4 of 7
1. Yes, you should be able to lower the voltage of the input and control the fans. Note that this obviously means that all connected fans will drop in speed.

2. Yes, it is possible to change the thread title. If you look at the top of the thread, just below the title it will have:

0 Unread Posts Subscribed Search This Thread Preferences Edit Thread

Click on 'Edit Thread' and you can change the title.

3. Use the "edit post" button rather than triple posting.
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post #5 of 7
You can change the voltage several ways. If changing the voltage via a fan controller or the motherboard then you need to make sure that all the fans that are connected do not exceed the fan controllers max wattage.

If you want to just permanently change the voltage you can run 5v or 7v to it directly from the PSU.

5v is what is on the other side of the molex connector and 7v is using the 12v positive as positive and the 5v positive as negative.
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by GingerJohn View Post

1. Yes, you should be able to lower the voltage of the input and control the fans. Note that this obviously means that all connected fans will drop in speed.

2. Yes, it is possible to change the thread title. If you look at the top of the thread, just below the title it will have:

0 Unread Posts Subscribed Search This Thread Preferences Edit Thread

Click on 'Edit Thread' and you can change the title.

3. Use the "edit post" button rather than triple posting.
T

Thank you.

Any idea how to lower the voltage?
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Baby Blue
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post #7 of 7
read this

http://www.instructables.com/id/12v-to-7v-Molex-Fan-Switch/

you can either make a switch that will switch from 12v to 7v, just run it at 7v, or make a switch that can switch between 7v and 5v.

That site only explains how to make a switch for 12v and 7v but you can easily get how to direct wire to 7v. If you want to make a 7v/5v then you might as well make a 12/7/5 switch but that it is a little more involved than just making a 12/7 switch so I recommend you stick with the 12/7 and add resistors if you want to tweak it a little bit.

If you want just straight 7v it is super easy and this image is an example of straight 7v



You just take the (-) pin out of the molex connector and move it to the far side. Then you have 7v.
Edited by givmedew - 9/26/13 at 5:36pm
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