Need help wiring PC fan

R

riceman

• Oct 30, 2011

• #1

Salvaged PC fan has four wires. Which is the positive and which is the negative?
Cant't make it work. Any advice will be much appreciated.

---------- Post added at 02:25 PM ---------- Previous post was at 02:24 PM ----------

Oops forgot the pictures:
http://i960.photobucket.com/albums/ae90/sdav834/CPs/IMG_3120.jpg
http://i960.photobucket.com/albums/ae90/sdav834/CPs/IMG_3121.jpg

 

mobile

• Oct 30, 2011

• #2

http://answers.yahoo.com/question/index?qid=20100717022629AAEyVkA

 

Last edited: Oct 30, 2011

lance

Class 5 Nepenthes hoarder

• Oct 30, 2011

• #3

Disregard the white and blue wires...those are for speed control..etc
If you strip back a cord to connect to the fan you will find a red and black wire (maybe w/ some other ones).
Just twist red to red and black to black together and put a wire cap (or something) on them to make sure you don't ever get shocked. Make sure the cord you choose is more that 5 volts or 12 volts or less depending on the speed you want for the fans. If you connect 2 fans to one cord make sure the input is 12 volts.

 

31drew31

• Oct 30, 2011

• #4

Ignore the blue and white wires, and refer to this post:

http://terraforums.com/forums/showthread.php?t=127945

 

R

riceman

• Oct 30, 2011

• #5

Nope. It doesn't work. Checked proper voltage and all that. The fan is dead.

 

lance

Class 5 Nepenthes hoarder

• Oct 30, 2011

• #6

Its circuit board probably blew....it happens
Try searching a computer junk yard if there's one near you

 

boxofrain

does this rag smell like chloroform to you?

• Oct 30, 2011

• #7

local PC repair shop

will have a small mountain of used fans. Many will also have the phone charger/adapter to hook to for the wall end.

 

jesse

• Oct 31, 2011

• #8

riceman said:

Nope. It doesn't work. Checked proper voltage and all that. The fan is dead.

Click to expand...

Did you also check the max. current of the AC/DC adapter?

I just checked the specs of your fan (from the ID on the picture and searching the Internet):
> Rated Voltage : 12V
> Operating Voltage Range : 4 ~ 13.4 V
> Input Current : 1.60 Amp
> Input Power : 19.20 Watt
> It comes with 4 wire lead (white=TAC sensor, red=power, black=gnd, blue=PWM control)
> to 5 pin Dell connector

This is a very strong fan that draws a lot of current.
The 12V AC/DC adaptor should have a rating of at least 1.6 Amp = 1600 mA or more.
Has it?

 

Not a Number

Hello, I must be going...

Staff member

Moderator

• Oct 31, 2011

• #9

You can trash the fan by putting current into the tach and/or PWM leads.

Fans are incredibly cheap if you buy them from a surplus electronics place:
http://www.allelectronics.com/make-a-store/category/220100/Fans/D.C.-Fans/1.html

 

Av8tor1

• Oct 31, 2011

• #10

Not always true, but usually with DC the red and black are power, with them being pos and neg respectively

+1 on warren's comment

 

R

riceman

• Nov 1, 2011

• #11

Yeah, I think you're right. I think I did just that. Thanks to you all for the help. I also checked the voltage and amps of the output. The fan is fried.
.

Not a Number said:

You can trash the fan by putting current into the tach and/or PWM leads.

Fans are incredibly cheap if you buy them from a surplus electronics place:
http://www.allelectronics.com/make-a-store/category/220100/Fans/D.C.-Fans/1.html

Click to expand...

 

dashman

• Nov 1, 2011

• #12

I have some large CPU fans if you need some.

 

R

riceman

• Nov 1, 2011

• #13

Thanks Dashman, very kind of you. I actually don't need one right now. I have a smaller one running, just that I have this one lying around so I thought I'd see if it runs and curious to see how powerful the fan is. Thanks tho'.