Need Help With 120mm Fan

[brick-brothers]

Ok I got my leds in today for my DIY led fixture. I went to radio shack and bought 2 fans that has a led built in for my led fixture. My question is what wall plug/ power source do I connect to the fans? And would I need to buy and adapter for them?

 

[ming]

Get a AC/DC transformer (which you can use from an old cordless phone or whatever you can find) which is minimum of 0.38mA (higher is OK)
If you want to connect both fans to 1 transformer, then it'll need to be minimum of the combined amps (.38 x 2 = .76mA = .76A)
and maximum of 12V (lower will make the fan spin slower)

The fan may have 2 or 3 wires, if its 3, the 3rd is speed sensing which is useless. You just need red and black.

 

[brick-brothers]

ok cool, so i would eliminate the connecter that comes with the fan. Also what about the single wire for the led?

Get a AC/DC transformer (which you can use from an old cordless phone or whatever you can find) which is minimum of 0.38mA (higher is OK)
If you want to connect both fans to 1 transformer, then it'll need to be minimum of the combined amps (.38 x 2 = .76mA = .76A)
and maximum of 12V (lower will make the fan spin slower)

The fan may have 2 or 3 wires, if its 3, the 3rd is speed sensing which is useless. You just need red and black.

 

[ming]

I never seen a 120mm fan having a separate wire for the led. try wiring up the fan and turn it on, its likely it'll also turn on the led's. if not, your led's for the tank light should be a good replacement :lol2:

 

[stbarnabas]

Come o m place I have lots of fan that you may need

 

[brick-brothers]

also what do you used to spacer would be need to put in between the fan and the heat sink and from the heat sink to the splash guard to protect the leds?

 

[brick-brothers]

lol, the fan i bought has a built in blue led that turns on with the fan turns on. Its pretty cool. Well to me that is.

 

[ming]

also what do you used to spacer would be need to put in between the fan and the heat sink and from the heat sink to the splash guard to protect the leds?

something that is on very tight so it doesn't vibrate when the fan is on. I was able to attach the screws onto the fins of the heatsink.
and you can get a thin piece of acrylic from home depot

lol, the fan i bought has a built in blue led that turns on with the fan turns on. Its pretty cool. Well to me that is.

I assumed that would happen

 

[bad coffee]

I drilled and tapped holes for screws for my fans. You want the fans blowing DOWN onto the heatsink. Not UP away from the fins. It depends on wiring and the way you put the fan.

 

[S1024L]

You could use the power brick (with molex connector) from this usb to sata/ide adapter I got it from microcenter and they are cheap enough. I got it a few months ago on sale for $11.75.

http://www.microcenter.com/single_product_results.phtml?product_id=0285941

 

[brick-brothers]

will that connect to the fans adapter? It looks bigger

You could use the power brick (with molex connector) from this usb to sata/ide adapter I got it from microcenter and they are cheap enough. I got it a few months ago on sale for $11.75.

http://www.microcenter.com/single_product_results.phtml?product_id=0285941

 

[ming]

will that connect to the fans adapter? It looks bigger

http://www.microcenter.com/single_product_results.phtml?product_id=0319763
Again, the volts and amp rule still applies what I said above. Just because it'll plug in doesn't mean it'll have enough juice to spin

 

[S1024L]

Those are standard computer fans and it should work. This power brick is used to power desktop (3.5") IDE hard drives. I've used this one power brick on 8 X 80mm fans with splitters and it works fine.

 

[brick-brothers]

so you have 8 fans on 1 power brick? If so my 2 fans wont be a problem.