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DIY 3-pin Splitter

post #1 of 4
Thread Starter 
So I wanted to make a 3-pin fan splitter. I read a post here about that but I was confused as to what to do with the 3rd cable. I have 2 female 3-pin and a male one but the problem is that they have 2 out of 3 wires. they only have the positive and the negative so what do I have to do? Should I cut another wire and connect the 3rd pin with the other 3rd pins?
post #2 of 4
3 pin fans run these:

Black -> GND
Red -> +12V
Yellow (Some times blue or brown) -> Tachimeter/RPM sense

So for your fan splitter you want all your fans to get GND and +12V from the splitter. The RPM sense wire is different; you only want ONE of the fans to be wired to that pin as having multiple fans report RPM through the same wire will confuse your motherboard and may even fry the header where you're plugging the thing.

Like in my very PRO paint diagram below... wink.gif

371
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Daily Driver
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post #3 of 4
Thread Starter 
Thank you very much that was exactly what I wanted to know smile.gif
post #4 of 4

+ rep for xXSebaSXx

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alpha updated
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secundus
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CPUMotherboardGraphicsRAM
i7 4790k Gigabyte GA-Z97X Gaming-7 Intel HD4600 Crucial Ballistix Sport Very Low Profile 8GB Ki... 
Hard DriveCoolingOSMonitor
Samsung 840 EVO 500GB Prolimatech Megahalems Rev. C Windows 8.1 Home Premium 64-bit Acer K242HL 
KeyboardPowerCaseMouse
Dell SK-8110 (PS/2) Seasonic X460 Fanless motherboard tray from CM ATCS 840 Logitech MX 1100 
Mouse PadAudio
Dell Creative SoundBlaster X-Fi MB3 
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA P55M UD2 ZOTAC/NVidia GTX 650 Ti 2GB 4x4GB G.Skill Ripjaws DDR3-1333 CAS9 
Hard DriveOptical DriveCoolingOS
Samsung 1TB Spinpoint F3 7200.12 Plextor 24x DVD burner Cooler Master Hyper Z600R Win7 64-bit 
MonitorKeyboardPowerCase
Dell E207WFP 20-inch flat panel Logitech Wireless 510 Seasonic X-650 fully modular 80+ Gold Lian Li PC-7FN 
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