Diy fan what do i need? - The Planted Tank Forum
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post #1 of 30 (permalink) Old 06-16-2008, 01:22 AM Thread Starter
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Smile Diy fan what do i need?

ok so im thinking of getting 2 80 mm computer fans mounted on the back of my hood i know i need a transformer or adapter but what is it actually? does anyone have a link to what it is? thanks! i want to get both fans hooked up to the same transformer so any help is appreciated!
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post #2 of 30 (permalink) Old 06-16-2008, 03:14 AM
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Like what you use to charge your cell phone the brick that plugs into the wall. You need to find the voltage of the fans and get the correct plug so that you will not overload the plug. See here.

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post #3 of 30 (permalink) Old 06-16-2008, 03:27 AM Thread Starter
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yeh an ac or dc adapter, but i mean how do u get it to connect to lose wires do u have to take it apart or buy a special one or what? (sorry dont know much about this)
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post #4 of 30 (permalink) Old 06-16-2008, 03:30 AM
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You may be able to wire up some rca style connections for very cheap.
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post #5 of 30 (permalink) Old 06-16-2008, 03:31 AM
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Clip the tip off of the adapter and twist the two wires together. The cover the wires with a piece of heat shrink tubing. Polarity really does not matter, just make sure the fan spins the way you want it to before you cover it.

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post #6 of 30 (permalink) Old 06-16-2008, 04:14 AM
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i can sell you 2 used fans $10 shipped i have bigger ones too


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post #7 of 30 (permalink) Old 06-16-2008, 04:29 AM
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nate sent me some fans and they're in great shape! the wiring schematic he included makes it look pretty easy, but I haven't had the time to do it yet...
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post #8 of 30 (permalink) Old 06-16-2008, 04:40 AM
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80mm computer fans generally work at 12v. I'm not sure about the current rating for each fan but both voltage and current ratings are important. You can probably go to radioshack or similar and buy a DC adapter with a voltage rating of 12v and lower. Now for the current rating, say your fan each use up 200mA, you'd need a DC adapter that has at least 400mA, 500mA to be safe.

To connect them, just the positives, probably a colored wire, together and the negatives together, most likely a plain black wire.
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post #9 of 30 (permalink) Old 06-16-2008, 04:55 AM
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Quote:
Originally Posted by rekabrekab View Post
Clip the tip off of the adapter and twist the two wires together. The cover the wires with a piece of heat shrink tubing. Polarity really does not matter, just make sure the fan spins the way you want it to before you cover it.
It is better to use butt connectors from radio shack. It is more secure than just twisting together. I would then tape over the connectors with electrical tape.

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post #10 of 30 (permalink) Old 06-16-2008, 07:36 AM Thread Starter
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thanks guys 10 dollars shippin included you say nate? hmmm let me think bout that a bit sounds like a good deal! wuldnt wire nuts work as well?
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post #11 of 30 (permalink) Old 06-16-2008, 07:52 AM
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thanks guys 10 dollars shippin included you say nate? hmmm let me think bout that a bit sounds like a good deal! wuldnt wire nuts work as well?
I'm tellin you man, go with the butt connectors. Much more secure than wirenuts.

These will probably do the trick:

http://www.radioshack.com/product/in...entPage=search

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post #12 of 30 (permalink) Old 06-16-2008, 11:51 AM
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I'm tellin you man, go with the butt connectors. Much more secure than wirenuts.

These will probably do the trick:

http://www.radioshack.com/product/in...entPage=search
ahh...nevermind I know wht you are talking about. Nice call. I stand corrected.


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post #13 of 30 (permalink) Old 06-16-2008, 12:17 PM
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i hate wire nuts!it might be cuz i took a electronics class and they said not fold the wire like that (it really wouldn't mader on something like this). but if you want it secure solder it and its better than a wire nut and less bulky


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post #14 of 30 (permalink) Old 06-16-2008, 12:19 PM
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just send me a pm if you want them


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post #15 of 30 (permalink) Old 06-17-2008, 03:19 PM
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Or you could go the really easy route

Get one of these puppies:


I picked it up at Wal-Mart for $6. It's a 4" fan that uses 120V power.

Cheap and simple.

It is a little large, but I plan on taking the "cage" off to lower it's overall profile, but if you have the room it's not necessary.

Thanks,
AndrewH


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