Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Fan Speed Controller - Build your Own

18 Oct 2010   #30
Silvion

Windows 7 Ultimate x64
 
 

Sorry, got a bit confused there..

What would you recommend as i have a gaming rig, so need the high airflow sometimes, so 100ohms potentiometer for that? But will that slow the fans down also to make them quiet?
What do you mean you picjed the 5v as a low? As you voltage line in?


Quote   Quote: Originally Posted by Lordbob75 View Post
Now, if you INCREASE the size on the potentiometer (i.e. 150 ohms), then the fan will spin slower. If you decrease the pot (i.e.100 ohms), then it will spin faster.
It is up to how slow you want the fan to go. I picked 5v as a low because that is the lowest it is really rated at, and it just turned off after that.
~Lordbob



My System SpecsSystem Spec
.
18 Oct 2010   #31
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Silvon,

I leave my fans at full speed simply because I have no reason to turn them down. I have a gaming rig too. When gaming, just turn them up to full speed.

Keep in mind that this is a VARIABLE resistor, so you can turn the fans up or down depending on the use.

5 volts is the minimum, because any less and the fan just shuts off.
In your case, I would stick with a 120 ohm potentiometer, as you will see the best results with that.
That allows you to leave the fans at full speed (12v) when gaming, or turn them down to 5v for quiet afterward.

If you get a 100ohm pot, then you could only turn it down to, say 7v, which will not be a slow (quiet) as 5v.

Make sense?

~Lordbob
My System SpecsSystem Spec
18 Oct 2010   #32
Silvion

Windows 7 Ultimate x64
 
 

Makes perfect sense, thanks a lot for clearing that up LB, appreciate it heaps!
My System SpecsSystem Spec
18 Oct 2010   #33
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by Silvion View Post
Makes perfect sense, thanks a lot for clearing that up LB, appreciate it heaps!
No problem.

Would be cool if you posted pics of it finished!

It is pretty cool to know my guide helped some random guy I have never met before do the same sort of mod I came up with

~Lordbob
My System SpecsSystem Spec
.

18 Oct 2010   #34
Silvion

Windows 7 Ultimate x64
 
 

Haha will do, might take me some time to make it though, i'm a novice (obviously) so learning as i go, enjoying it heaps

Plan is to make fan controller like yours, mount it in 5.25" bay to control 6 fans, thinking about adding another switch to turn on/off leds for each fan.. but one at a time i think xD
Yeah found your tutorial through google. I've used heaps of information from it, Couldnt find anything else useful apart from your tutorial, so grats

Thanks a lot for helping me out
My System SpecsSystem Spec
18 Oct 2010   #35
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by Silvion View Post
Haha will do, might take me some time to make it though, i'm a novice (obviously) so learning as i go, enjoying it heaps

Plan is to make fan controller like yours, mount it in 5.25" bay to control 6 fans, thinking about adding another switch to turn on/off leds for each fan.. but one at a time i think xD
Yeah found your tutorial through google. I've used heaps of information from it, Couldnt find anything else useful apart from your tutorial, so grats

Thanks a lot for helping me out
If you need any help with the wiring, etc feel free to PM me or post here. I check the forums at least once a day, so I will see it and reply fairly quickly (assuming I am not in class).

In regards to the fan controller bay, I can tell you right now that you can only really fit 4 across (assuming you can't find pots smaller than mine). You might want to consider using either 2 rows of 3, or some other lineup.
Also figure out how to mount the LEDs in the fan bay (there are nice little LED holder that should work fine).

The fan bay itself could prove problematic. I know mine was an absolute bitch to build, so I hope you have a better way than I did.

~Lordbob
My System SpecsSystem Spec
18 Oct 2010   #36
Silvion

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Lordbob75 View Post
If you need any help with the wiring, etc feel free to PM me or post here. I check the forums at least once a day, so I will see it and reply fairly quickly (assuming I am not in class).

In regards to the fan controller bay, I can tell you right now that you can only really fit 4 across (assuming you can't find pots smaller than mine). You might want to consider using either 2 rows of 3, or some other lineup.
Also figure out how to mount the LEDs in the fan bay (there are nice little LED holder that should work fine).

The fan bay itself could prove problematic. I know mine was an absolute bitch to build, so I hope you have a better way than I did.

~Lordbob
Ah right, maybe i can look into two 5.25 bays joined then.. make much more room that way, wouldnt have to worry about being space conservative ha
For the LEDs i have some 3mm mounts, that make the LEDs look nice just sitting there..
Cheers, yeah still working out how to exactly mount it..
My System SpecsSystem Spec
14 Sep 2011   #37
StalkeR

Windows 10 Pro x64
 
 

Excellent tutorial,thanks !
My System SpecsSystem Spec
19 Dec 2011   #38
xXTyMeador73Xx

Windows 7 Ultimate x64
 
 
Cannot Find Desired Potentiometer (20ohms of resistance)

This is exactly what I'm looking for. great instructions, easy to follow, simple construction. The problem is that i have a ridiculously powerful fan. it runs from 7-14.5V dc and draws 440 mA (.44 amps). i would like to drop it to 7V with the pot turned all the way down, and 12V with the pot all the way up (using a 12V rail obviously) the problem is that i need a potentiometer with 19.5 ohms (i would settle for 20 ohms) resistance. All i can find with this resistance are things called "trimmers" and not actual potentiometer's like the one you used. do you have any ideas as to where i could find one?
My System SpecsSystem Spec
21 Dec 2011   #39
Lordbob75

Windows 7 Ultimate x64, Mint 9
 
 

Quote   Quote: Originally Posted by xXTyMeador73Xx View Post
This is exactly what I'm looking for. great instructions, easy to follow, simple construction. The problem is that i have a ridiculously powerful fan. it runs from 7-14.5V dc and draws 440 mA (.44 amps). i would like to drop it to 7V with the pot turned all the way down, and 12V with the pot all the way up (using a 12V rail obviously) the problem is that i need a potentiometer with 19.5 ohms (i would settle for 20 ohms) resistance. All i can find with this resistance are things called "trimmers" and not actual potentiometer's like the one you used. do you have any ideas as to where i could find one?
You can also look for variable resistors, those are the same as potentiometers and sometimes easier to find.
It shouldn't be too hard to find that potentiometer, but I don't know where you have been looking.

~Lordbob
My System SpecsSystem Spec
Reply

 Fan Speed Controller - Build your Own




Thread Tools




Similar help and support threads
Thread Forum
Test Mode Windows 7 Build 7601 for controller
A few months ago i did some sketchy things to my computer in order for it to recocnize the drivers for my Xbox 360 USB remote. I somehow set it into "Test Mode Windows 7 Build 7601." Unfortunatly doing this screwed with quite a few things such as my bluetooth so i can no longer connect to my apple...
Drivers
SATA AHCI Controller, IDE DVD RW slow speed
I have 2 IDE DVD drives (TEAC DV-W516D DVD/CD ReWriter, and TSSTcorp DVD-ROM SH-D162C DVD/CD Reader). Teac is capable of 16X DVD writting. My motherboard Gigabyte Z77-D3H has only SATA II/III slots. So I connected each IDE optical drive to motherboard's SATA II slot(s) using IDE to SATA I adapters...
Hardware & Devices
Fan Speed Controller
My Antec 300 case came with 2 case fans that have a switch H M L switch on them... and it is kind of a pain in the ass to open the case to switch the fan speeds. I usually keep them on low for noise reduction, but during gaming or other heat intense work id like them to ramp up a bit to keep the...
Hardware & Devices
[Project] Fan Speed Controller
Alright! I finally succeeded in getting the first third of my fan controller completed. I thought I would post a picture of what it looks like right now: What do you all think? I have it plugged into my side fan for now, and have left it on full speed. The issues I have run into are:...
PC Custom Builds and Overclocking
Xbox 360 Controller Bug in Build 7068?
I have used my Xbox 360 wired controller with my PC for a while, on both XP and Vista prior to installing Windows 7 Betas. The first time I noticed this was with build 7068 x64, which is what I am currently using. If anybody else has a wired xbox 360, let me know if you can reproduce this. If I...
Gaming
Build 7227 networking speed improved!
I usually always, on all builds, would get a constant 10.3 or 10.4 MB/sec across my 100Mbps network. Now look since I just installed build 7227.
Network & Sharing


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 05:09.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App