Converting 3pin fan to USB Tags: Fan USB Components Last response: April 10, 2010 2:37 AM in Components Share tarshm April 10, 2010 2:12:35 AM Im bored and want to convert a few old 3pin 2.5inch fans to usb to cool my laptop the fan has 3 cables (red white and black) anyone have an idea of how to hook this up to a usb More about : converting 3pin fan usb saaiello April 10, 2010 2:26:10 AM I think you need different fans to run off of USB since USB only has 5 volts comeing out if thats enough to get them spinning it wont spin very fast. Just use the black and red wires you dont need the white wire. Red to +5volt black to ground. tarshm April 10, 2010 2:37:44 AM cheers mate, ill give it ago if anything ill gain a bit more knowledge in electronics Can't find your answer ? Ask ! Publish Related resources : ForumI converted my Antec 900 fans from Molex to 3-pin ForumPCI-e USB 3.0 add-on card & 3-pin fan cable? Forum3-pin CPU Fan and only 4-pin CPU Fan connecter.. HELP! ForumCorsair H80 Has 3Pin Fan & my MB has 4Pin Fan ForumHow do I plug a 4-pin fan into a 3-pin plug? ForumCan i connect a 3pin fan connector to my mobos 4pin fan provision ForumProblem - 3-pin Mobo Header, but 4-pin Fan Power (not molex) ForumPush Pull w/ 3-pin fans? ForumNeed more 3-pin connectors for fans ForumHow to connect case fan molex to 3-pin on mobo? ForumNo cooler master case fan connector please help ForumCPU Fan Won't Spin Correctly ForumCasual Conversation Thread Mk III ForumNew Z77 build ForumFan Plug Help ForumWhich Fan for overheating hard disks ForumOpinions and price of this PSU........... ForumUSB got power not transmitting infomation. ForumUsb device has exceeded the power limit ForumUsb keyboard failure More resources Read discussions in other Components categories Power supplies Sound cards NICs Akasa Antec Cooler Master Cougar DeepCool Enermax !