Multiple 12 V DC fans to regular outlet???


  #1  
Old 11-09-08, 08:30 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Multiple 12 V DC fans to regular outlet???

Hey there. I need your wisdom one more time.

If I needed to power three DC 12v computer fans, could I use a single DC "wall cube" rated at 12 v and over 500ma to power all three? Would I need one per fan? Is there an easier way?

Thanks!!
 
  #2  
Old 11-09-08, 09:23 PM
nap's Avatar
nap
nap is offline
New Member
Join Date: May 2006
Location: north
Posts: 4,162
Likes: 0
Received 1 Like on 1 Post
if you can tell us the current draw of the fans or the power rating, it can be answered accurately.
 
  #3  
Old 11-09-08, 10:33 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
110 CFM 120mm

will that do it?
 
  #4  
Old 11-09-08, 10:40 PM
F
Member
Join Date: Mar 2006
Location: NE Wis / Paris France{ In France for now }
Posts: 4,807
Likes: 0
Received 2 Likes on 2 Posts
The fan size don't useally make the diffrence there but the current drawage as you can see on the motor nameplate it will stated the current drawage in MA ( milliamps ) that what we looking for.

Merci,Marc
 
  #5  
Old 11-09-08, 10:49 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Power Up 120mm Case Fan - Sleeve Bearing TC3G-4011 at TigerDirect.com

That is the link to the fans I'll be buying.
 
  #6  
Old 11-09-08, 10:53 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
http://www.newegg.com/Product/Produc...82E16835185054

Oops, I may get this one. I don't see an Ma reading on either page though.
 

Last edited by Mountainman86; 11-09-08 at 11:13 PM.
  #7  
Old 11-09-08, 11:16 PM
F
Member
Join Date: Mar 2006
Location: NE Wis / Paris France{ In France for now }
Posts: 4,807
Likes: 0
Received 2 Likes on 2 Posts
To be fair in here I will have one of the guys which he is pretty good with computer related stuff and he should be chiming in anytime { I do not know when but he will show up anyway } and he can give you little more info about the MA rating on the fan motor.

However.,, I am sure they don't useally draw any more than half amp the most { 500 MA } unless one of the guys correct that info.

Merci,Marc
 
  #8  
Old 11-09-08, 11:27 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Thank you! I'll keep an eye out for him... somehow.

I plan on wiring 3 of these FANS to a regular outlet and controlling at least 2 of the fans speeds with THIS.

Any suggestions would be greatly appreciated!
 
  #9  
Old 11-10-08, 04:53 AM
R
Member
Join Date: Apr 2007
Location: Near Buffalo, NY
Posts: 4,233
Likes: 0
Received 1 Like on 1 Post
Marc PM'd me and asked me to take a look-see at this thread.

The fans from Newegg are 12 vold DC and draw .6 amps -- 600 milliamps -- each. (Click on the photo to enlarge it and you can ready the specs on the label.)

The Zalman power supply is 5 volts and clearly states not to use any fans that require more than 5 volts.

You'll need a 2-amp 12VDC power supply to power three of those fans.

Or you could buy 120-volt AC versions of the fans. Here's a sample.

What are you planning to use them for?
 
  #10  
Old 11-10-08, 02:37 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Thanks for comin by Rick!

I would love to use a 120 volt AC version of the fans (which I assume I could wire right to an extension cord), but (the one sample you gave me anyway) doesn't have the cfm I'm looking for (~100).

If I can not use the Zalman thing, how can I control the fans speed?

So I could use something like this to power all 3 fans? If so, I get how to connect one fan, but how would I go about connecting 3 fans to it?

Thanks again!
 
  #11  
Old 11-10-08, 05:44 PM
R
Member
Join Date: Apr 2007
Location: Near Buffalo, NY
Posts: 4,233
Likes: 0
Received 1 Like on 1 Post
Hi Mountainman,
It seems like overkill to use a 2-amp DC power supply to power the fans you've chosen, and the Zalman is out of the question because it doesn't provide enough voltage to the fans.

It's really important that you answer the question about what the fans will be used for. (You're not really planning to cool a computer, are you?) We can all then provide workable solutions to your problem.
 
  #12  
Old 11-10-08, 08:57 PM
M
Member
Thread Starter
Join Date: Nov 2008
Posts: 15
Likes: 0
Received 0 Likes on 0 Posts
Hey again Rick.

I must have misunderstood or something because I asked what power supply should I use to power three of the fans I gave a link to. You said a 12V 2A DC power supply so that's what I found a link to and posted. So now I'm confused.

Lets just say I'll be using 2 fans. How could I power two of these fans to AC power.

I stated on a previous thread that I'm building a box for my girlfriend to grow her plants in (oregano, thyme, basil, etc.) over the winter in a controlled environment.

Thanks!!!
 

Last edited by Mountainman86; 11-10-08 at 09:18 PM.
  #13  
Old 11-11-08, 05:06 AM
R
Member
Join Date: Apr 2007
Location: Near Buffalo, NY
Posts: 4,233
Likes: 0
Received 1 Like on 1 Post
My apologies. "Overkill" means the power supply doesn't need to be regulated. It will work fine, but you may find a cheaper 12vdc "adapter". Any will work as long as it can handle the total load of the fans.

For the fans you chose, each will draw .6 amps, or 600 milliamps. Three fans will equal 1.8 amps or 1800 milliamps. A 2-amp (2000 milliamp) supply will do the job.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: