How to wire up computer fans

Discussion in 'Growing Marijuana Indoors' started by konaguy, Jan 28, 2009.

  1. Hi all i was just trying to find out how to give power to my computer fans and there controller

    here is the fans im using Here i will be using 4


    i have tryed a computers Power supply but no power i want to be able to control the fan speed so i was thinking about using this HERE to control the 2 fans in my flowering room and the 2 fans in my clone and mother room

    tell me what you guys think

    while i go smoke :smoke:
     
  2. so just run all 4 fans and the controller off this one 12v power
     
  3. you have to jumo the power supply to turn it on to power your fans.. goto google and type how to jump a pc power supply its easy.. and it'S DC so it wont shock you
     
  4. Yes you will need a bigger power supply than the radio shack post above. Your going to need something that can deliver at least 1.04 Amps.

    (Math: Your fans draw 3.12 W at 12V
    Power=Icurrent*Voltage
    Icurrent=Power/Voltage
    I=3.12W/12V
    I=.260 Amps
    .260 Amps * 4 Fans = 1.04 Amps..... WOOOO go engi-nerds)

    Obviously you'll need a little something larger than that I would say 1.5 Amps at least.
    And I wouldn't waste your money on the fan controller just get a variable resister than can handle .26 amps or 3.12 W how ever its labled. Just wire it in series with the fan and you can turn the speed up and down as you please. May not be the perfect solution but it will probably only cost you $2

    ~Toro
     
  5. thanks man im a computer guy so i had a lot of them sitting around i cleaned one up and it works so well lol you are a life saver
     
  6. How loud is 33.6 dba?? Is it noticeable? I have to be sneaky about my grow box..
     
  7. its liek if you was 5 feet from some one and they whispered to you, so like 5 feet away you will hear it fantly

    if im not mistaken
     
  8. Nice fan... I'm thinking of using PC fans for my application as well. How will you use each of the four fans? My only concern is that you're not getting enough bang for the buck. I feel like you could do better for 40+ bucks, not to mention the price of that controller. What's the cubic footage of the space you're trying to cool?

    My setup right now is not filtered, so it's pretty basic. It includes a 60mm fan at .25 amps, and an 80mm at .11 amps. Intake and exhaust, respectively. When it comes time to filter, I'm going to add two 92mm fans, each at .30 amps to work with the carbon filter.

    Good luck! How about some more info on your grow?
     
  9. well my cab is a 30cf room with 2 105w cfl 2700k and 3 4gallon pots for flowering and for clones its 6cf with 4 2' T5 6400k or something like that lol 4" inline 180cfm fan no filter yet and the two 50cfm fans at the bottom and 2 at the top to move air in the clone room to keep temp down my mom and dad found my plants and killed them all so i went to the stop today and bout 4 locks to put on it and im stating over now but

    the 4" inline fan is hanging on the ceilling with rubber rings so it dont make a bizzing noise on the wood or anything,

    i plan on flowering 3 plants at a time witch should be a little over an oz a Harv. i hope

    but thats my setup its hard to get pics of the cab cause its in a hall way in my room its very strange but thats my set up
     
  10. no problem....
    dam brah mom and dad ravished your plants huh. maybe its time to take it outdoors.. besides outdoors you can get a easy oz per plant with minimal efforts
     
  11. i dont have a yard lol i live in a condo so i cant do it outdoors but with the lock they wount break in or anything

    so it should be ok
     
  12. Won't they still know the grow is there though? I'd try the "weed is better/safer than booze" argument with them. Worked for my parents. Let them know you're going to smoke anyway, and would they rather have you associate with 'dangerous' dealers, or have an innocent, undetectable grow. I also pointed out my mother's perscription(s), and the scotch in my dad's hand.
    If they still aren't convinced, bake 'em some cookies or something :smoking:
     
  13. i did that tonight lol and it worked so i dont think they will mess with them again lol
     

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