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OfflineTheLegend
Stranger
Registered: 05/23/05
Posts: 217
Last seen: 14 years, 6 days
psu (power supply unit) from pc to heat sink fan ATX fresh air exchange
    #5340497 - 02/26/06 10:10 AM (17 years, 10 months ago)

Put a wierd title so that people searching can find this cause it took me ages to find it :smile:

Basically you can use a ATX power suply unit just fine to run as many fans as you like

What you have to do it cross the 14 pin in most cases with any of the black ground wires.

First of all here is the label thats on your PSU, it will chance completely from psu to psu especially american to european



What stays the same is the word GROUND and the word PS-ON ... there the two your interested in ...

Most american psu's are this colouring

Here is a list of leads on a 20 pin connector,


  PIN  COLOR    NAME    DESCRIPTION
------------------------------------
  1  Orange  +3.3V    Power, +3.3V
  2  Orange  +3.3V    Power, +3.3V
  3  Black    GND      Ground
  4  Red      +5V      Power, +5V
  5  Black    GND      Ground
  6  Red      +5V      Power, +5V
  7  Black    GND      Ground
  8  Gray    PWR-OK  Power OK
  9  Purple  +5V VSB  +5V VSB
  10  Yellow  +12V    Power, +12V
  11  Orange  +3.3V    Power, +3.3V
  12  Blue    -12V    Power, -12V
  13  Black    GND      Ground
  14  Green    PS-ON    PS Remote on/off
  15  Black    GND      Ground
  16  Black    GND      Ground
  17  Black    GND      Ground
  18  White    -5V      Power, -5V
  19  Red      +5V      Power, +5V
  20  Red      +5V      Power, +5V


And this is a list of leads on a 24 pin connector,


  PIN  COLOR    NAME    DESCRIPTION
------------------------------------
  1  Orange  +3.3V    Power, +3.3V
  2  Orange  +3.3V    Power, +3.3V
  3  Black    GND      Ground
  4  Red      +5V      Power, +5V
  5  Black    GND      Ground
  6  Red      +5V      Power, +5V
  7  Black    GND      Ground
  8  Gray    PWR-OK  Power OK
  9  Purple  +5V VSB  +5V VSB
  10  Yellow  +12V    Power, +12V
  11  Yellow  +12V    Power, +12V
  12  Orange  +3.3V    Power, +3.3V
  13  Orange  +3.3V    Power, +3.3V
  14  Blue    -12V    Power, -12V
  15  Black    GND      Ground
  16  Green    PS-ON    PS Remote on/off
  17  Black    GND      Ground
  18  Black    GND      Ground
  19  Black    GND      Ground
  20  White    -5V      Power, -5V
  21  Red      +5V      Power, +5V
  22  Red      +5V      Power, +5V
  23  Red      +5V      Power, +5V
  24  Black    GND      Ground


So for mine the grey one was the PS-ON and ANY black one at all is the ground

so i took out a black wire and squashed down the metal part at the top with a Pliers so that it isnt as wide but still the same lenght



see the gap beside the grey was a black one and i cut it out so i didnt wreck the metal part


After squashing the metal part at the top it fit into the grey connection


Its in about a half an inch and is very tight thats the way you want it


Make sure there is no power going to it while your working on it and then connect a heat sink fan to it



once you have this connected then get an extension lead that has a switch or if theres a switch on your psu thats even better ... plug it in with the switch on off and then get a wooden stick or anything thats wooden and use that to flick the switch on hahaha so at least if you fucked up you wont kill yourself you will just short the fuse and off it goes :smile:

I am in NO WAY at all an electrician and this is litteraly just something ive read from other posts and ive put together i take no responsibility for this and id like someone that knows something about electricity to tell me if this is safe :smile:

Another way of doing this would be to cut the grey/green PS-ON wire and cut any black wire and peel back some of the insulation and then wrap the two wires around each other and then cover up with insulation tape.

AND DO NOT PUT THE PSU into your fruiting chamber! only put the fan, and do not have the wires in a way that moisture could run down fromt he wires coming out of the FC onto the psu ... you could put the psu higher then the fc.

im connecting two fans to this and putting them in my FC today and have them on for 5-10 minutes every 2-3 hours.


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Offlinetokey666
Let's Build It Instead
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Registered: 08/05/05
Posts: 666 666 Posts!
Last seen: 2 years, 8 months
Re: psu (power supply unit) from pc to heat sink fan ATX fresh air exchange [Re: TheLegend]
    #5341013 - 02/26/06 01:07 PM (17 years, 10 months ago)

Kudos! Good stuff there!

That is excellent how you broke it down. Good job!


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Invisiblecappa
Nerd
Registered: 02/12/06
Posts: 854
Re: psu (power supply unit) from pc to heat sink fan ATX fresh air exchange [Re: tokey666]
    #5341156 - 02/26/06 01:56 PM (17 years, 10 months ago)

You can also get female 4 pin molex connector kits if your fan just has bare wires. Then you use one of the 4 wire leads off the power supply. Allows you to select a slower fan speed.

Wire/Position 4 +5 volts
Wire/Position 3 Ground for 5 volts (0 volts)
Wire/Position 2 Ground for 12 volts (0 volts)
Wire/Position 1 +12 volts

If you use 5 volt positive and 5 volt common u get 5 volts.
If you use the 12 volt positive and the 5 volt ground you will get 7 volts.
If you use the 12 volt positive and 12 volt ground you get 12 volts.

Three speeds to choose from and you dont have to mess with the big ass connector.

~Cappa.


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OfflinerDr4g0n
Young Hand
Male User Gallery
Registered: 01/17/06
Posts: 587
Last seen: 17 years, 7 months
Re: psu (power supply unit) from pc to heat sink fan ATX fresh air exchange [Re: cappa]
    #5344332 - 02/27/06 07:02 AM (17 years, 10 months ago)

ive got an old at power supply that i use. since its at, its pretty much useless lol.


--------------------
i can speel... im just too lazy to sppelcheck.

My first trip (good read) - Speed Leaching Poo! - My Second Trip (with art)


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