Power supply for 12v 120mm fans

[lost66]

I have 2 120mm computer fans I plan to use to cool down my tank. Fan has old style computer connector 4 pin and something smaller 3 pin which I am not familiar.

I cannot connect them to my Apex because I have older model and I don't want to buy module plus cables for around $200...
So my question is, any budget power supply with voltage regulation to 12v? I don't want to run them full power. Any links from Amazon or Ebay? What do you use?

 

[jgirardnrg]

Those connectors shown usually carry both 12v and 5v DC. To wire it up and have variable control you could do something like this for power:


and to control the speed:



Haven't tested these myself but a quick search on Amazon for variable speed 12v fan power supply yielded those results on page one. You'd be using the smaller molex connector on your fans with those.

 

[unitedaf]

I have 2 120mm computer fans I plan to use to cool down my tank. Fan has old style computer connector 4 pin and something smaller 3 pin which I am not familiar.

I cannot connect them to my Apex because I have older model and I don't want to buy module plus cables for around $200...
So my question is, any budget power supply with voltage regulation to 12v? I don't want to run them full power. Any links from Amazon or Ebay? What do you use?

Was thinking about the same but with 80mm fan and was going to print a 3D bracket for it

 

[lost66]

I also found this power supply on Amazon and it looks cool having 2 outputs. But unfortunately it doesn't have adjusting voltage and this addon you linked costs too much. I would need 2 of them as I can see from the cables input/output.

 

[lost66]

I found this one

And I hope it will work. I can see it has this green plug I can wire both fans. Fingers crossed because I purchased this item already

 

[kyleinpdx]

Cut off the 3 pin header, 4 pin molex connector and solder them to a 12v wall wart.

(just an example, you may need something with more amperage.)

I have a variable speed 120mm fan for cooling my tank hooked up this way. Its contolled by my reef keeper via one of the power strips.

If you have a soldering iron it'll take you less time than it took me to type this out.

 

[jgirardnrg]

The controller comes with a 3 way splitter it looks like so you could connect your two fans to that

I also found this power supply on Amazon and it looks cool having 2 outputs. But unfortunately it doesn't have adjusting voltage and this addon you linked costs too much. I would need 2 of them as I can see from the cables input/output.

The controller comes with a 3 way splitter. You could use it to connect both of your fans.