|System Name||Small ATX Desktop|
|Processor||Intel i5 8600K|
|Motherboard||Asrock Z370 Taichi|
|Cooling||Phanteks PH-TC14PE CPU HSF, Arctic MonoPlus VGA HSF|
|Memory||G-Skill TridentZ 2X8GB F4-3200C14D-16GTZ|
|Video Card(s)||Zotac 1060 6GB Mini ZT-P10600A-10L|
|Storage||Samsung 970 Pro 512GB NVMe, Phison E12 NVMe 1TB, 1xWD4005FZBX, 2xWD10EZEX|
|Display(s)||Dell S3220DGF 32" 2560x1440 165Hz|
|Case||Lian Li PC A05NB|
|Audio Device(s)||Audiotechnica ATH M50X, Antlion Mod Mic 4, SYBA SD-CM-UAUD|
|Power Supply||Seasonic SS-660XP2 660 Watt Platinum|
|Mouse||Zowie EC2A Mouse on Corsair MM600|
|Keyboard||Filco Majestouch II Ninja TKL|
|Software||Win 10 LTSC 1809|
I'm sorry, i'm not an expert, but if you still need it, you might want a bigger resistor at the output. This one will dissipate 1,44W at 12V output. I'd also think about a cap to flatten the voltage. Alternations in the voltage may couse the fan to stick to certain harmonic frequencies of the signal.Hello, its been great to know that this thread is living so long and still being commented and a great thread to know the PWM thing and electronic hack nicely. If anybody listen then help me to answer for the following. I drawn a similar circuit suggested by Lazzer408 on a online simulator and tried to run it, It was simulated nicely without any error. Can anybody suggest me any for mods, or can I go ahead to make on the board for real test?
View attachment 84940
First, many thanks for sharing. Sorry for necro, but I built this circuit and used a SUP50N03 (instead of the IRL530N) which can source hefty amps even at Vgs=2v and has low Rds(on): http://www.vishay.com/docs/66570/sup50n03.pdf ... it doesn't say it's a logic level mosfet, but specs show it should work just fine, unless I'm mistaken! Please correct me.I had to start a new thread because I couldn't update the old one.
Here's the improved mosfet version of the 4pin pwm to 3pin fan circuit. This is closer to Intel's spec which allows for up to 5.25v pull-up and 5ma on the pwm pin. This is 5.15v and 1.2ma. Any logic-level n-channel mosfet capable of a few amps will work fine.
Tested, working. Enjoy.
|Processor||AMD Ryzen 5 1600|
|Motherboard||Gigabyte - GA-AB350M-Gaming 3|
|Memory||Corsair - Vengeance LED DDR4-3000 16GB|
|Storage||Western Digital - Black PCIe 256GB SSD + 3x HDD|
|Display(s)||42" TV @1080p (main) + 32" TV (side)|
|Case||Cooler Master HAF X NV-942|
|Audio Device(s)||Line 6 KB37|
|Power Supply||Thermaltake Toughpower XT 775W|
|Mouse||Roccat Kova / Logitech G27 Steering Wheel|
|Keyboard||Roccat Ryos TKL Pro|
|Software||Windows 10 Pro x64 v1803|
Thanks for replying. I used a SUP50N03 which can source 5+ amps at 2.4v, and goes up to 50+ amps with higher Vgs (it's also a fast switching mosfet). I built the circuit in the 1st post to drive 6 powerful fans rated at 12v, 5.4w. At full speed these fans together draw about 2.5 amps.Hi there,
The clicking sound shouldn't be a problem. In fact, many cheap PWM controlled fans make it. It happens because of the steep signal edges. Better fans have some integrated ICs to power the motor more gently and reduce the sound level. Anyway if you check datasheets of same fans, one with PWM control and one without, the PWM fan should be rated as louder. (fe. BQ pure wings 2 are rated for 19.2dB and the PWM version for 20.2dB).
And if you're interested, high side switching + cap works well on arduino, so you can try it with your PC.
|System Name||Best AMD Computer|
|Processor||AMD TR4 1920X|
|Motherboard||MSI X399 SLI Plus|
|Cooling||Alphacool Eisbaer 420 x2 Noctua XPX Pro TR4 block|
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|Audio Device(s)||Corsair Void Pro, Logitch Z523 5.1|
|Power Supply||Corsair HX1200!|
|Mouse||Logitech g7 gaming mouse|
|Software||Windows 10 Pro 64 Steam. GOG, Uplay, Origin|
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A lot of modern motherboards have DC/PWM right on the header and you can usually adjust it in the BIOS. It even works for pumps.Hi, I was searching for solution how to control my 3 pin fan using PWM and found this thread. I want to buy (not DIY) simple and cheap solution. It seems there is PHANTEKS PWM FAN HUB. This hub is for multiple fans. It allows you to control 3 pin fans using 4 pin pwm. http://www.phanteks.com/assets/manuals/PH-PWHUB.pdf http://www.phanteks.com/PH-PWHUB.html It cost about $15.
For single device I found Phobya 4Pin PWM to 3Pin Transformer. It is quite expensive ($12) on amazon https://www.amazon.com/gp/offer-listing/B01HQBNXYK
but for me local dealers seems to have better price ($3) https://www.aquatuning.sk/vodne-chladenie/monitorovanie/regulatory/20355/phobya-4pin-pwm-auf-3pin-transformer-single
I hope this saves lot of searching if someone else in future found this thread