Page 1 of 4 1 2 ... LastLast
Results 1 to 20 of 64
  1. #1

    DIY Fan Controller for PWM Fans



    This neat fan controller project requires only a little time, expense, and commitment, and the circuit is relatively easy to build and very satisfying to use!
    ... Return to article to continue reading.
    Last edited by David; 01-17-11 at 07:10 AM.

  2. #2
    Forums Super Moderator
    Overclockers.com Lead Editor


    David's Avatar
    10 Year Badge
    Join Date
    Feb 2001
    Location
    Glasgow, Scotland
    Author Profile Benching Profile Folding Profile
    Nice writeup
    David J. Nelson MChem(Edin) PhD(Strath) MRSC [ResearcherID: D-3927-2011] [Google Scholar]
    OC Forums Super Moderator // Overclockers.com Editor


    The Workhorse: [Lenovo W510] Intel Core i7-720QM / 8 GB DDR3 / nVidia Quadro FX880M / Crucial M4 256 GB SSD / Windows 7
    The Home Machine: AMD Llano A6-3650 APU / 8 GB DDR3 / Lots of HDDs / Antec Dark Fleet DF-85 Case / Windows 7
    The Benchmarking Setup: Various LGA775 chips / Asus Rampage Formula / 2 GB OCZ 1066 MHz DDR2 / nVidia Quadro NVS 285 / 320 GB HDD / Windows 7 [ Untouched for well over a year ]

    My research fellowship is eating all my time, so I may be slow to reply to emails and private messages.

  3. #3
    Low Profile Senior bing's Avatar
    Join Date
    Jul 2006
    Location
    Indonesia
    Heatware Profile
    Hey Dave, great article, nicely done and well consolidated too !

    Love the intro, and those illustrations too, thanks.

  4. #4
    DarkWarrior's Avatar
    Join Date
    Sep 2010
    Location
    Denmark
    Folding Profile
    Nice , very good.
    AMD FX-8350 , ASUS Crosshair V Formula , 8GB DDR3 , Gigabyte GeForce 460GTX 1GB OC
    2X AMD Opteron 6128 , Supermicro H8DG6-F , 16GB DDR3 , ATI Radeon HD2600 Pro
    2X Intel E5320 , Dell PowerEdge 1900 , 8GB DDR2 , ATI Onboard Stuff

    Folding User Stats

  5. #5
    Premium Member #21


    Jmtyra's Avatar
    Join Date
    Aug 2010
    Location
    Dallas/Fort-Worth
    Author Profile Folding Profile Heatware Profile Rosetta Profile
    Awesome article, I may have to build one of those!
    Thanks for writing this up.

  6. #6
    Member
    LennyRhys's Avatar
    Join Date
    Nov 2010
    Location
    Dundee, Scotland, UK
    Thanks guys - couldn't have done it without the oc forums community!
    i7 920 @ 4200MHz, 1.216v | TRUE
    Gigabyte X58-USB3
    6GB Dominator GT @ 1600 6-6-6-18 1.5v
    GTX570
    Toughpower 775w

  7. #7
    Special Member ★ madhatter256's Avatar
    Join Date
    Jul 2008
    Location
    CFL
    Folding Profile Heatware Profile
    Damn, those fans are loud!!

  8. #8
    Premium Member #21


    Jmtyra's Avatar
    Join Date
    Aug 2010
    Location
    Dallas/Fort-Worth
    Author Profile Folding Profile Heatware Profile Rosetta Profile
    260 CFM fans? You betcha! And he only cranked them to 75%.

  9. #9
    Glorious Leader I.M.O.G.'s Avatar
    10 Year Badge
    Join Date
    Nov 2002
    Location
    Rootstown, OH
    Author Profile Benching Profile Folding Profile Heatware Profile
    Dave, really happy to see this article on the frontpage - great read, very clear, and a cool project spawned out of the forums. Getting the fans to you was no problem, and I'd be happy to do it again anytime! Thanks for putting this together!
    The OC Forums Way
    We are a team. We are a community. We are a fellowship made strong by mutual respect and shared dedication to the task of enriching all who come here.
    The OC Forums Thank You Thread
    Put your computer to work for our OC Forum Teams!
    Try out our POST TEMPLATES, they save you time answering common questions!

    I spend half my money on CPUs, GPUs, and Liquid Nitrogen. The other half I waste.

  10. #10
    Awesome, thanks for putting this into words. Many people can benefit from this write up.
    HTPC/Main Rig: 42" LG 1080p - Windows 7 Professional
    EVGA P55 FTW - i7 860 4914.3 MHz Max and 4412 MHz 24/7
    Venomous X - SANYO DENKI - 9SG1212P1G01 - 260 CFM @ 6000 RPMs
    Corsair TX850 - Super Talent 2000MHz 8-8-8-24 (1320MHz 6-6-6-19)
    BFG GeForce GTX 260 OC MaXcore 55(SLI)
    Coolermaster HAF 932
    Heat

    My Homemade PWM Controller for "The Beast"

  11. #11
    Fronting as a Mod Member
    Seebs's Avatar
    Join Date
    Aug 2010
    Location
    Sunshine State
    Benching Profile Heatware Profile
    Hell yeah... Great write up. I'm sure there will be plenty more controllers built because of this; I, for one, am going to be putting my bread-boarded controller down on perf-board pretty soon. And once the first one is all done there will be a few more coming behind it.
    Daily Driver: GA-890FXA-UD5 - Ph II X6 1090T - 16GB DDR3 1333MHz - MSI R9 280X Gaming Edition/HD 5670/HD6570 - Venomous X Black + G1238B12BBZP-00 - TX850V2 - CM 690 II Advanced
    Join the "Benching Team" - We have secret sauce! - OptyTrooper: GPUs are for burning not playing games anyway
    Kona on League of Legends: This game sits about as well with me as a gallon of prune juice does, and the results are just as nasty.
    I done got Pinked...

    Be sure to pre-tin everything (even soldered stuff!) with leaded solder. None of the RoHS junk. You want good old fashioned toxic heavy metals. ~ Bobnova

  12. #12

  13. #13
    Member with Some Fancy Text Under His Name CompuTamer's Avatar
    Join Date
    Jan 2009
    Location
    Brandon Mississippi
    Nice write up! Glad to learn how to build these things.

    Those fans are insane... i need a few to build a hovercraft with!
    Intel Core i7 C0 @ 4.01GHz with 1.388 vCore ..........................................Intel i7 4500U
    Intel DX58SO Motherboard IOH + QPI @ 1.250 Volts..............................Lenovo Yoga 2 Pro
    Sony Optiarc Blu-Ray Drive.................................................. ...............802.11AC
    8 GB G-Skill Sniper DDR3 1600 @ 1.65 Volts ...........................................8GB DDR3 1600Mhz RAM
    60GB OCZ Solid 3 + 320GB WD Blue+ 1TB WD Green...............................Samsung 250GB SSD
    Antec 900.................................................. .......................................All Metal Body
    BFG GS-650.................................................. .....................................Lenovo Power Brick + 54Whr Battery
    XFX Radeon HD 4850 (660/1060 53C Idle 62C Load) @ 1.31 vCore............Intel HD4400
    Dual Dell E2311H LED 1920x1080.................................................. .......13.6" 3200x1800 Touchscreen
    Windows 7 Ultimate.................................................. ..........................Windows 8.1
    Those specs up there? They're silent. Silence is good. Very good.
    Your Core 2 Quad is based off of the Pentium pro in a few ways.

  14. #14
    Computational Oncologist / Biomathematician / Moderator on Vacation, Ph.D.
    macklin01's Avatar
    10 Year Badge
    Join Date
    Apr 2002
    Location
    Pasadena, CA
    Folding Profile Heatware Profile
    Nice work and write-up!

    Brings back great memories of when men were men, and we had to make our own controllers or do the 5V/7V tricks. (Back before Zalman and everybody else flooded the market with pre-made controllers. )

    Very nice design. Best -- Paul
    My heatware (macklin01)

    Need image I/O for your science apps? Try EasyBMP

    My biomedical research: Mathematical Cancer Modeling & Simulation

    I'm on vacation as a moderator as I devote more time to my faculty position.
    Thank you for your understanding if I don't respond to your PM. -- Paul

  15. #15
    Member
    LennyRhys's Avatar
    Join Date
    Nov 2010
    Location
    Dundee, Scotland, UK
    I highly recommend getting one of these fans for kicks

    Paul - thanks, and it's nice to see somebody else putting Dundee on the map!!
    i7 920 @ 4200MHz, 1.216v | TRUE
    Gigabyte X58-USB3
    6GB Dominator GT @ 1600 6-6-6-18 1.5v
    GTX570
    Toughpower 775w

  16. #16
    Registered
    Join Date
    Dec 2005
    Is it possible to replace the manual control with a thermistor and let the temperature control the fan speed? (with a rheostat as an adjustment). haven't been able to find such a circuit anywhere and commercial offerings are way too expensive.

  17. #17
    Computational Oncologist / Biomathematician / Moderator on Vacation, Ph.D.
    macklin01's Avatar
    10 Year Badge
    Join Date
    Apr 2002
    Location
    Pasadena, CA
    Folding Profile Heatware Profile
    I should think that would be possible.

    Two configurations to think about:

    (1) rheostat + thermistor in series: net resistance is additive

    (2) rheostat + thermistor in parallel: net resistance is R1 * R2 / (R1 + R2)

    Option (1) involves soldering your thermistor after or before P1.

    Option (2) would be a matter of soldering the thermistor in parallel with potentiometer / rheostat R1.

    There are pros and cons to both to think about. -- Paul
    My heatware (macklin01)

    Need image I/O for your science apps? Try EasyBMP

    My biomedical research: Mathematical Cancer Modeling & Simulation

    I'm on vacation as a moderator as I devote more time to my faculty position.
    Thank you for your understanding if I don't respond to your PM. -- Paul

  18. #18
    It would be possible, but I think your dealing with two kinds of temperatures. One inside the case and the temperature of the CPU Cores. Since you could only go off of the core temperatures for your CPU, you would have to tap those temps from the Motherboard. In that case a lot of the newer motherboards use PWM to control their fan circuits, especially the higher end ones.

    The problem (you will find out if you read my whole thread) is with the stepping of those PWM circuits. This is where this controller comes in. In all honesty, you really only need about 3 or 4 speeds for this fan. Low/Med/High would work in almost all cases, except that different fans at this speed exhibit noises that can only be eliminated if you turn them up or down ~50 RPMs. In essence your are tuning them. It would be too much work to try to tune a 3 speed controller.

    I run my fan daily at about 900 RPMs. I turn it up to about 2000 while gaming and then I turn it to 6000 while benching. All of these are +/- 50-100 rpms. You just can't do that with switches. Well actually, you could... on a non PWM, but then you would deal with Undervolting which would also produce annoying noises.

    I could have built a thermistor into this circuit, but PWM really was probably overkill for most computer users, and a thermistor controlled PWM would be definitely overkill. Essentially a thermistor is just a variable potentiomter, just like the 10 or 100k Poti used in this circuit. So one would just replace the Poti with the thermistor.... Problem solved. You just have to tune it/
    HTPC/Main Rig: 42" LG 1080p - Windows 7 Professional
    EVGA P55 FTW - i7 860 4914.3 MHz Max and 4412 MHz 24/7
    Venomous X - SANYO DENKI - 9SG1212P1G01 - 260 CFM @ 6000 RPMs
    Corsair TX850 - Super Talent 2000MHz 8-8-8-24 (1320MHz 6-6-6-19)
    BFG GeForce GTX 260 OC MaXcore 55(SLI)
    Coolermaster HAF 932
    Heat

    My Homemade PWM Controller for "The Beast"

  19. #19
    Low Profile Senior bing's Avatar
    Join Date
    Jul 2006
    Location
    Indonesia
    Heatware Profile
    Just came out of my mind on one simple thing, Lenny, how many fans maximum that controller capable of driving ? Ever tested 4 of that beasts altogether ?

    This is interesting since as original circuit without the booster (inv sch buffer) couldn't drive even one as Brutal experience.

  20. #20
    Member
    LennyRhys's Avatar
    Join Date
    Nov 2010
    Location
    Dundee, Scotland, UK
    I'll get round to it soon bing. Problem with four fans is the enormous power draw of nearly 200 watts and 14-16 amps.

    I think I'll buy a cheap PSU specifically for testing the fans - don't want to short my system again!!
    i7 920 @ 4200MHz, 1.216v | TRUE
    Gigabyte X58-USB3
    6GB Dominator GT @ 1600 6-6-6-18 1.5v
    GTX570
    Toughpower 775w

Page 1 of 4 1 2 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •