So you line up the adapter wire that has the white lines on it with the red wire of the fan. Find it and more at Jameco Electronics. Here's a Fan controller specifically for pc fans. you will need an adapter to convert the voltage to DC, at 12V. Either the red or blue wire is just to tell your computer the speed at which the fan is running. Just get an old ac adapter that is 12 volts. Uses very little space when attached to existing 4pin molex pass-through. Ignore it. 4.6 out of 5 stars 37. You want to connect 24V to a 12V motor DIRECTLY and SAFELY: Sooooooâ¦. If you buy a few on ebay you can generally get them cheap. But when dimmed that caused a very loud screeching sound. Adaptor for connection of up to 4 fans with 3-Pin Molex plug (CPU fan, case fan etc.) The four wire connectors are for processor fans with higher power consumption. I have a CPU fan that I'd like to wire to a 12v PSU.. Buy 240v to 12v adaptor and get the best deals at the lowest prices on eBay! 1. If you see all possible combinations there would be exactly 27 combinations for you to try. So youre saying that that connecting two fans with a single 12v ac adaptor, the fans will perform almost the same as a single fan the the adaptor 120mm, 90CFM fan for $11.95. With respect to the wiring, I know that the 4-wires in my PWM fan correspond to the following: BLACK---GND YELLOW---12V GREEN---TACHOMETER BLUE---PWM Therefore, I connected the BLUE wire into the Number 3 Pin in the Digital I/O portion of the Arduino UNO. In this video I show you how to modify a computer case fan to run off of wall power, and how to control the fan's speed. Connect all the red wires together, then all the black wires together. And the middle one is the powersupply fan. Simply connect Yellow and Red to +12V and the fan will run. Wire them in parallel. Many of the answers I read below are assuming two fans in series in the system. The controller has a power adapter that plugs in the wall and the 12v PC fans plug directly into the controller to get power. ELUTENG 120mm Fan 12V with Power Adapter, Premium Ventilation Fan with 3 Speed Control Cooling for Receiver, Router, Laptop, DVR, Playstation, Computer - Upgraded Version 4.6 out of 5 stars 71 $15.99 $ 15 . Also note that sometimes the ground ( â ) wire from the fan is not black, but blue. Usually 3 wires on it. this is a good thread. Free shipping. 99 Bodhi2000 USB to 4-Pin PWM 5V USB Sleeved Fan Power Adapter Cable, USB to 4 Pin Case Fan Adapter Connector Cable 3.4 out of 5 stars 8 £2.16 £ 2 . On the fan, the three pins are Red = +12V, Black = Ground, Other Colour = Tachometer. Best Buy sells them. I have tried following the advice here and here, and connected the black outside wire on the fan to my PSU -V, and then connected the next, red wire on the fan to my PSU +V.Yellow and green wires are left disconnected; I want the fan to run at full speed. When the fan is not running my multimeter tells me there is 14V on the yellow sensor wire. (I've also tried to connect the PWM wire to the 5,6,9,10, and 11 pins but to no avail) In stock. Its a 2 wire motor and pulls 3amps. From this point, you will need to test your setup. DUDE!! Simply hardwire it to the 12V power fuse panel in your vehicle and plug the micro USB plug (micro USB adaptor also included) into the device you need to power. In a 3-wire fan, the extra (third) wire is the âtachometerâ signal (Tacho) wire that indicates how fast the fan is running. PWM Fan Splitter , 4 pin Adapter Cable Sleeved Braided Y Splitter for Desktop Computer CPU Fan Splitter PC 4 Pin Fan Extension Power Cable 1 to 4 Converter 10 inches (2 Pack) Limited time offer, ends 02/19. Sold by Wvzong and sent from Amazon Fulfillment. Everything I've read on the internet says to just "ignore the green and blue wires" so I think either my power supply is insufficient or somehow I need to feed a signal to the PWM (blue) wire. In stock. Step 2. Connect your Black PC/Axial wires to the Adapters BLACK wire.----- This is an easy thing to do and should only take about a minute to hook-up. This item: 12V USB Fan Adaptor Connector Cable Convert USB to 3 pin 5V Output Computer PC Fan £6.49. 80mm computer fan that is thermally controlled. But if you are willing to spend money $25 can get this nice controller that somebody else posted in another thread. Again cheaper on ebay. This is a combo plug with Male on one side and female on the other with a 4" 2 wire extension to power a standard 3pin fan plug. I have a 3-wire 12v DC fan (Sanyo Denki 9S1212M4011).It's actually getting 15V because my "12V" wall wart isn't accurate. Get it as soon as Wed, Dec 2. For those of you having problems with multi-wired fans, my advice would be to buy them with only the 2 wires. I agree. 3 wire is for fan speed , pick one, black or red , one is for high speed and one is low and then tape off unused wire on fan.hope that helps, if not i will try ⦠The yellow wire (12V) on the 4 pin fan must go to the red lead (12V)on the 2 pin connector. The power adapter needs to be a 12 volt AC/DC power adapter. Check out Generic Computer PC Fan 12V 4 Pin to 5V USB 2.0 Adaptor Connector Cable Cord Wire reviews, ratings, features, specifications and more at ⦠The little one is the cpu fan. Mini 3-4 pin adapter for 12V Devices. The other wires on the fan are for control and aren't needed for your purpose. Next, we need to strip the wires so that the core of the wire is exposed. Works fine with eather a USB 1A or 2.1A port. to wire it up to a power supply you will have to cut off the barrel plug (or whatever shape it ⦠They're usually only a buck or 2 a piece. An easy to find 12 volt computer fan. But MAYBE. something like a laptop power adapter will work, try to find one that's 12v and at least one amp. Computer case fans usually run at 12v. Step One Here is a ⦠Fan 1 to 8 Channel Hub 12V 3Pin Power Supply Splitter Adapter PC Fan with LED. You want an AC adapter that ouputs 12V. 2 Pack 4-Pin (Actual 2-Pin) Molex to 3 Pin 12V PC Case Fan Power Adapter Cable, 3-Pin or 4-Pin (PWM Connector) to Molex Computer Case Fan Power Adapter Cable 4.6 out of 5 stars 63 $6.90 $ 6 .