Failure. Requesting help on soldering....
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Old 11-12-2014, 11:02 PM   #1
wishba
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Failure. Requesting help on soldering....


Hello,
I created a FW pico planted aquarium a year ago but ended up with a temperature of 90F due to the Elite Mini Filter. Plants were fine, but I could not keep any Malaysian Trumpet Snails as they quickly died from heat.

I bought mini PC cooling fans, but have no idea how to solder them into what kind of adapter and gave up. Can anyone advise me on how to solder which wires to where for these mini fans?

Any help would be greatly appreciated,
wihsba
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Old 11-12-2014, 11:28 PM   #2
PhysicsDude55
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The fan will need 12V DC. A 12V DC power supply is easy to find if you know where to find it. Any sort of electronics store will have one if you ask an associate to help you find it.

Then you simply just need to clip off the connector off the fan, and off the 12V DC power supply if it has one, and connect the black wire wire to negative, and red wire to positive. On the 12V DC power supply, there should be one wire with a white stripe on it, or white dotted line, and that will be the positive wire.

You can use any sort of wire connector you want. A wire nut, or crimp, or whatever you think is best. A wire nut is probably the easiest.
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Old 11-12-2014, 11:37 PM   #3
wishba
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Quote:
Originally Posted by PhysicsDude55 View Post
The fan will need 12V DC. A 12V DC power supply is easy to find if you know where to find it. Any sort of electronics store will have one if you ask an associate to help you find it.

Then you simply just need to clip off the connector off the fan, and off the 12V DC power supply if it has one, and connect the black wire wire to negative, and red wire to positive. On the 12V DC power supply, there should be one wire with a white stripe on it, or white dotted line, and that will be the positive wire.

You can use any sort of wire connector you want. A wire nut, or crimp, or whatever you think is best. A wire nut is probably the easiest.
Thank you, PhysicsDude! Does this mean I will not need to use a soldering iron and things?
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Old 11-12-2014, 11:48 PM   #4
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Thank you, PhysicsDude! Does this mean I will not need to use a soldering iron and things?
You can if you want to.... but I wouldn't. Kind of overkill in my opinion.
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Old 11-13-2014, 12:02 AM   #5
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Get yourself some cheap 140mm or 120mm fans. They'll move a lot more air and be much quieter. Same wiring. Use crimps.
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Old 11-13-2014, 12:04 AM   #6
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It is possible to power them with 5V - they will just spin slower.

Easiest option is to get a USB to 3pin fan adapter from evil bay and then just use an old usb phone charger to power it.

Adapter looks like this

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Old 11-13-2014, 12:08 AM   #7
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It is possible to power them with 5V - they will just spin slower.

Easiest option is to get a USB to 3pin fan adapter from evil bay and then just use an old usb phone charger to power it.

Adapter looks like this

That's a great idea.

And yeah, any fan I've gotten that is less than 80mm is usually really loud.
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Old 11-13-2014, 12:10 AM   #8
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Or...you can also just get a sponge filter from the Flea Bay and get rid of that "takes up half your tank" filter you have. About $6.
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Old 11-13-2014, 12:29 AM   #9
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You can if you want to.... but I wouldn't. Kind of overkill in my opinion.
Roger that.

Bump: Thanks, everyone. Will consider the 120mm - 140mm fans, 5v 3pin USB adapter, and the sponge filter which would pretty much resolve everything.
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Old 11-13-2014, 02:50 AM   #10
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I've had a bit of trouble trying to use crimps on wire with this small of a diameter. It's tough to get a really good crimp and the wire wants to pull out. Soldering is not hard. In this case with such a small mil wire you need the really fine solder and a low wattage iron. You heat up the wire, not the solder, and let the wire melt the solder. That gives you a good solid joint instead of a cold joint. The solder should melt right into the strands of the wire not sit on top of it.
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Old 11-13-2014, 10:56 AM   #11
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id say you used the wrong crimps...
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Old 11-13-2014, 01:27 PM   #12
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And if you do decide to solder, DONT USE ACID CORE SOLDER!
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Old 11-13-2014, 01:40 PM   #13
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Quote:
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And if you do decide to solder, DONT USE ACID CORE SOLDER!
x2. Flux (rosin) core solder FTW, 60/40 tin/lead. That lead free stuff sucks.
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Old 11-13-2014, 09:36 PM   #14
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Take a look over on Dendroboard

A lot of people build ventilation systems for their vivs, and use some set up with computer fans and phone chargers, there are quite a few how-tos over there.
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Old 11-13-2014, 10:34 PM   #15
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Quote:
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id say you used the wrong crimps...
No. I used the right crimps. It's an inherent problem with small diameter wire.
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