DIY mini cooler using computer LED fans - The Planted Tank Forum
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post #1 of 23 (permalink) Old 07-07-2006, 12:55 AM Thread Starter
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DIY mini cooler using computer LED fans

Lately the temperature in Southern California is scorchingly hot with average temperature of 82F indoors. My shrimp tank was getting a bit hot so I decided to add two LED fans that was lying around to cool down the tank a bit. These fans were originally from my computer case. This isn't the most beautiful design because I use heavy duty scotch tape to hold the fans down. It might look reckless because it's just taped down but believe me, with the dimensions of the fan and the rim of the 10 gallon tank, it's a pretty strong hold.

Materials:
* Computer fans
* Strong tape (I use Scotch)
* AC Adapter (I use DC 9V)

Tank:


Fans:


Close up:




Wiring:




Temperature:


Questions, comments, advices are appreciated

NOTE: I just added a cable tie where the AC adapter input is located to tie down the connection.
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post #2 of 23 (permalink) Old 07-07-2006, 02:07 AM
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maybe you could find a way to modify it so that the fans were the legs of the light unit.
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post #3 of 23 (permalink) Old 07-07-2006, 08:03 AM
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I used an old laptop DC adapter and a knob-speed controller with 4x120mm fans in my hood with my MH bulbs. Very powerful or very low speed depending what you set it at, it can really drop the temp of the tank but it really evaporates a lot of water.


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post #4 of 23 (permalink) Old 07-08-2006, 09:26 AM
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Smile Finally!

WOW I have searched the WEB far and wide in order to learn about a computer-fan based cooling system!

I'm here in Sunny San Diego but my 30 gal is set up in Torrance. Anyway, I managed to get a hold of 4 computer fans from radioshack for 20 dollars and an adapter for 10. A bit more than I wanted to pay but I'm really hoping it'll pay off.

Have you noticed the over-night condensation? I'm afraid to install it just right now because of the fact that it might crap out in a couple of days. How long has your set-up been running (with the fans)?
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post #5 of 23 (permalink) Old 07-08-2006, 05:09 PM Thread Starter
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The setup has been running for about 4 days now and I turn off the fans at night because 1) it's hard to sleep with the LEDs on and 2) I'm afraid the temperature might drop too much. I'll be adjusting the fans a bit more in a week or so after I rescape the tank.
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post #6 of 23 (permalink) Old 07-08-2006, 06:29 PM
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Drsfostersmith has a set up for $20 right now....

http://www.drsfostersmith.com/Produc...o_Cooling_Fans
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post #7 of 23 (permalink) Old 07-08-2006, 10:10 PM
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Cool

Capturedbyrobots:

Yes I am aware of Drs Smith and Foster's Azoo fan, but with shipping, you'd probably be paying about 25-27 USD, not to mention tax and so forth. Still, a good deal if you'd rather not be handy or rather not get into a hassle.

JBN:
A solid alternative to your scotch-tape solution is to go to Home Depot and buy a slab of acrylic. All you'll need then are some long screws, nuts, bits and a Drill. My plan is to mount them on acrylic and rest on the side of the tank, similiar to how you have it now.

This idea is mainly influenced by:
http://www.melevsreef.com/acrylics/fan_tray.html

But I dont have the tools to cut acrylic so well so I'll have to do without.
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post #8 of 23 (permalink) Old 07-09-2006, 12:33 AM Thread Starter
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Wow that looks great Supamii, but the problem is I don't have the tools for it either.
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post #9 of 23 (permalink) Old 07-09-2006, 12:33 AM
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There is no tax with Drs Foster and smith, unless you're in their state.

They have a flat shipping rate,
but when one needs to buy a few things,
it's really worth it.

LOVE JBOT
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post #10 of 23 (permalink) Old 07-09-2006, 06:09 AM
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That contraption looks dangerous. Id hate to see anyone lacking in your special ability to adhere all things dangerous above water with tape try and emulate your design. If you cant spare 4 dollars or the time to buy some spare 16 gauge copper wire and electrical tape perhaps your forrays into DIY shouldnt involve electricity and water.
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post #11 of 23 (permalink) Old 07-09-2006, 10:48 PM
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In all fairness Jimmy Yahoo,

He could dump those fans into the water,
and they would stop working,
but that would be all.
( 9V DC at maybe 400mA wouldn't hurt a thing)

You could take those DC leads from that adapter
and stick them to your tongue, and
be fine.....
Low voltage low amperage DC is super safe.

Now 120VDC or 120VAC is another story
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post #12 of 23 (permalink) Old 07-10-2006, 01:04 AM
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I think JimmyYahoo was just displaying some "tough-love" by providing some advice for going about mixing water and electricity- =)

In anycase, CapturedByRobots, are you contemplating any type of cooling mechanism? This doesnt exactly seem like the most popular topic.
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post #13 of 23 (permalink) Old 07-10-2006, 03:12 AM
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Nope, I don't need one.

I live in San Francisco,
where my apartment never gets above 72
unless I run the heater.
Summers are cold here.
Very cold.....
I wore a heavy coat to watch the fireworks.
That's cold.....
LOVE JBOT
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post #14 of 23 (permalink) Old 07-12-2006, 02:38 AM
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This is my way of cooling my tank. http://i76.photobucket.com/albums/j3...e/DSC00372.jpg Cheap and easy. I live in Japan and its Jungle hot out here!
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post #15 of 23 (permalink) Old 07-16-2006, 12:57 PM
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I'll post my pix up ASAP!!! It really works. Condensation was a feared problem but i managed to place the fans away so that much of it will never affect the fans. Most of all, my PC fans cool down my PC lights significantly - it never feels like it is HOT. again, I will post my pix up ASAP! =)
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