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Windows 7: Lights - Add An On/Off Switch

Lights - Add An On/Off Switch

Published by Lordbob75
18 Jun 2010
Published by

How to Create your Fan Light Switch


information   Information
This tutorial will show you how to add a switch to turn off those bright LED fan lights they use.

warning   Warning
This project involves soldering and bare wire leads. Always take the appropriate cautions when working with electrical parts.

While it may seem very daunting at first, this tutorial is actually extremely simple once you see what to do.



Items needed:
  • Computer fan
  • 22 Gauge Wire
  • 4 pin FEMALE (and male if you want) MOLEX connectors (to connect to PSU)
  • Wire clippers
  • Heat Shrink (optional, but highly recommended)
  • Solder and Soldering Iron (or pliers and cable connectors if you don't mind it)
    • *This tutorial will assume that you know how to solder, and that is the method you will use. If you have any questions about soldering or using connectors, feel free to ask*
Set up:
Set up your Soldering station to your preference, and make sure you have wire (and connectors) and solder. I used 22 Gauge wire because it is about the same size as the wire used in the fan already. I also recommend you use a Test PSU to test this mod until you are sure it works.
warning   Warning
When you touch two leads from the power supply (i.e. The yellow and red wires, or the yellow and black, etc) you will short out the power supply. If this occurs, immediately unplug the PSU and take the wires apart. This is why I recommend heat shrink.


Step 1:
Remove the plastic sticker covering the back of the fan. This will be the side with the wires leading to it, generally the one with the voltage information on it (just the one you SHOULDN'T remove...)

Step 2:
Locate each of the fan LED wires. My fan was cool enough to have the + and - symbols located on the circuit board, so it was easy to figure out which was which.
You will need to desolder the NEGATIVE wire from the circuit board (all of them)
warning   Warning
If you solder the positive side, and then attach them directly to the PSU, you WILL blow out your LEDs, rendering them so much junk


Step 3:
This is the hardest step. You need to take a small wire, and solder it to each LED wire. It would look better if you could run the wire under the plastic to keep it down, but this was EXTREMELY difficult to do, so I lift some of it over the plastic. How much you want to struggle with that is your decision, but the step remains the same.

Step 4:
Now you have an extra fan wire that needs to be grounded for the lights to work. It needs to be attached to a black PSU wire (the middle 2 connectors on the 4 pin molex).
This can be accomplished by merely adding a switch in the line, then sending it out to a molex pin with the fan plug.
I know this step may sound very confusing right now, but I have yet to actually do this part. When I do, I will add pictures and more detail to clear it up.

Here is my semi-completed project. I have utilized all 5 sections of this series. To the right is my keyed start switch (the key switch at bottom right and aircraft safety toggle switch). On the top is my cathode switch and my soon-to-be fan light switches. The bottom has 3 of my 4 potentiometer speed controllers.
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Hope this helps out the modders!

~Lordbob


Related Tutorials


Computer Mod Series:
1. PSU - Jump Start
2. Start Button - Customize
3. Fans - Speed Controller
4. Lights - Add An On/Off Switch
18 Jun 2010   #1
WindowsStar

Windows 7 Enterprise (x64); Windows Server 2008 R2 (x64)
 
 

Some pictures of your fan mod would be extremely nice.

My System SpecsSystem Spec
18 Jun 2010   #2
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by WindowsStar View Post
Some pictures of your fan mod would be extremely nice.
Yes, it would.
I only took one, but I will add it in soon.

When I fix up my second LED fan, I will take many more.

~Lordbob
My System SpecsSystem Spec
18 Jun 2010   #3
WindowsStar

Windows 7 Enterprise (x64); Windows Server 2008 R2 (x64)
 
 

Looking like the cockpit of a 767 ... hehehe


Attached Thumbnails
Lights - Add An On/Off Switch-boeing_767_cockpit.jpg  
My System SpecsSystem Spec
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18 Jun 2010   #4
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by WindowsStar View Post
Looking like the cockpit of a 767 ... hehehe
Naw, more like a space station!

Quote   Quote: Originally Posted by Nemix77 View Post
Wow! I love the space station PC look and launch missiles button.
~Lordbob
My System SpecsSystem Spec
18 Oct 2010   #5
ZaLiTH

 

Hey LordBob, I just thought of something that might improve this process a bit... I'm not sure of the correct name, so trying to Google a picture for it is a bit tricky, but you know the plugs used to connect the power / HDD access lights to the motherboard? What about plugging the LED straight into that and doing the solder work on the cables from the plug instead?

I'm sure the LED pins would fit quite nicely in one of those plugs, and if so, that would make the process of connecting an LED much easier.
My System SpecsSystem Spec
18 Oct 2010   #6
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by ZaLiTH View Post
Hey LordBob, I just thought of something that might improve this process a bit... I'm not sure of the correct name, so trying to Google a picture for it is a bit tricky, but you know the plugs used to connect the power / HDD access lights to the motherboard? What about plugging the LED straight into that and doing the solder work on the cables from the plug instead?

I'm sure the LED pins would fit quite nicely in one of those plugs, and if so, that would make the process of connecting an LED much easier.
You can just use the 3 pin fan connectors (male) to connect to the case lights, but plugging into the mobo would need the right kind. Easiest thing to do would be to find an old case and unplug those

I wish I had thought of this sooner. Would have saved my case connectors.

~Lordbob
My System SpecsSystem Spec
18 Oct 2010   #7
ZaLiTH

 

Quote   Quote: Originally Posted by Lordbob75 View Post
You can just use the 3 pin fan connectors (male) to connect to the case lights, but plugging into the mobo would need the right kind. Easiest thing to do would be to find an old case and unplug those

I wish I had thought of this sooner. Would have saved my case connectors.

~Lordbob
Sorry, I wasn't referring to actually connecting the lights directly to the motherboard... Simply using those same plugs to plug the LED into, as opposed to soldering the wires onto the LED connectors.
My System SpecsSystem Spec
18 Oct 2010   #8
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by ZaLiTH View Post
Quote   Quote: Originally Posted by Lordbob75 View Post
You can just use the 3 pin fan connectors (male) to connect to the case lights, but plugging into the mobo would need the right kind. Easiest thing to do would be to find an old case and unplug those

I wish I had thought of this sooner. Would have saved my case connectors.

~Lordbob
Sorry, I wasn't referring to actually connecting the lights directly to the motherboard... Simply using those same plugs to plug the LED into, as opposed to soldering the wires onto the LED connectors.
That would work as well.

~Lordbob
My System SpecsSystem Spec
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