Using DC computer cooling fans in entertainment center

[SC]

Thanks for the info. I appreciate it.

For those wondering why I am using 80mm instead of 120mm, I already have
several 21dBA 80mm fans just sitting around so I figured I would just use
those.


"Severian" <nobody@nowhere.com> wrote in message
news:U8bHd.4326$Rs.3824@newsread3.news.atl.earthli nk.net...
> Power (watts) = Volts * Amps, so you're right in your calculations, if
> they
> are 1.2 watts it will be .1 amps, or 100 milliamps.
>
> The 500 mA will work, but as you say if you want some growth room if you
> want to go to more fans the 1000mA unit would be the best choice.
>
> I've found that I can run such fans at lower voltages successfully in
> order
> to slow them down enough to quiet them. Depending on the fan you may want
> to
> try this if they're noisey. At some voltage they will stop working, but
> I've
> used small pancake fans rated at 12 volts as low as 5 before. Some will
> need
> at least 8 to run at all, others require less, need to experiment.
>
> Good luck with it!
>
> "SC" <no_spam@thank.you> wrote in message
> news:vH0Hd.43$G33.2974@news.uswest.net...
>> I'm want to install four 80mm ultra-quiet computer fans in my
> entertainment
>> center for cooling. I am planning on using a 12VDC transformer to power
>> them, but just want to make sure of the size of transformer to get.
>> Would
> a
>> 12V/500mA AC-to-DC power adapter from Radio Shack be fine? I'm a little
>> rusty on my knowledge of amps, watts, etc. but I think the fans run at
>> 1.2
>> watts at 12V, so that should be about 100mA, right? So, if that's
> correct,
>> if I wanted to give myself to add any additional fans I should probably
> take
>> the next step up to a 12V/1000mA power adapter.
>>
>> Am I figuring this out correctly? Any feedback would be appreciated.
>> Thanks!
>>
>>
>
>
>

[Oliver Costich]

On 18 Jan 2005 17:06:12 GMT, coneilliv@aol.comDELETE (COneilliv)
wrote:

>Be sure to run them in series if you are going to put several in. Also, why
>not run 120mm fans rather than 80mm so that it is quieter for the same amount
>of airflow (or more)?
>
>CJ


And use Rotron Whisper fans?

[COneilliv]

Be sure to run them in series if you are going to put several in. Also, why
not run 120mm fans rather than 80mm so that it is quieter for the same amount
of airflow (or more)?

CJ

[David]

"COneilliv" <coneilliv@aol.comDELETE> wrote in message news:20050118120612.11021.00000075@mb-m28.aol.com...
> Be sure to run them in series if you are going to put several in. Also, why
> not run 120mm fans rather than 80mm so that it is quieter for the same amount
> of airflow (or more)?
>
> CJ
RUNNING THEM IN SERIES IS BAD ADVICE FOR BRUSHLESS DC FANS!! Bigger fans is good advice.
David

[Severian]

Power (watts) = Volts * Amps, so you're right in your calculations, if they
are 1.2 watts it will be .1 amps, or 100 milliamps.

The 500 mA will work, but as you say if you want some growth room if you
want to go to more fans the 1000mA unit would be the best choice.

I've found that I can run such fans at lower voltages successfully in order
to slow them down enough to quiet them. Depending on the fan you may want to
try this if they're noisey. At some voltage they will stop working, but I've
used small pancake fans rated at 12 volts as low as 5 before. Some will need
at least 8 to run at all, others require less, need to experiment.

Good luck with it!

"SC" <no_spam@thank.you> wrote in message
news:vH0Hd.43$G33.2974@news.uswest.net...
> I'm want to install four 80mm ultra-quiet computer fans in my
entertainment
> center for cooling. I am planning on using a 12VDC transformer to power
> them, but just want to make sure of the size of transformer to get. Would
a
> 12V/500mA AC-to-DC power adapter from Radio Shack be fine? I'm a little
> rusty on my knowledge of amps, watts, etc. but I think the fans run at 1.2
> watts at 12V, so that should be about 100mA, right? So, if that's
correct,
> if I wanted to give myself to add any additional fans I should probably
take
> the next step up to a 12V/1000mA power adapter.
>
> Am I figuring this out correctly? Any feedback would be appreciated.
> Thanks!
>
>

[SC]

I'm want to install four 80mm ultra-quiet computer fans in my entertainment
center for cooling. I am planning on using a 12VDC transformer to power
them, but just want to make sure of the size of transformer to get. Would a
12V/500mA AC-to-DC power adapter from Radio Shack be fine? I'm a little
rusty on my knowledge of amps, watts, etc. but I think the fans run at 1.2
watts at 12V, so that should be about 100mA, right? So, if that's correct,
if I wanted to give myself to add any additional fans I should probably take
the next step up to a 12V/1000mA power adapter.

Am I figuring this out correctly? Any feedback would be appreciated.
Thanks!

Why do you need four?
Radio shack sells a cooling fan that runs off of 115 volts and its pretty
quite and five in diameter and cools my modest system pretty well
"SC" <no_spam@thank.you> wrote in message
news:vH0Hd.43$G33.2974@news.uswest.net...
> I'm want to install four 80mm ultra-quiet computer fans in my
entertainment
> center for cooling. I am planning on using a 12VDC transformer to power
> them, but just want to make sure of the size of transformer to get. Would
a
> 12V/500mA AC-to-DC power adapter from Radio Shack be fine? I'm a little
> rusty on my knowledge of amps, watts, etc. but I think the fans run at 1.2
> watts at 12V, so that should be about 100mA, right? So, if that's
correct,
> if I wanted to give myself to add any additional fans I should probably
take
> the next step up to a 12V/1000mA power adapter.
>
> Am I figuring this out correctly? Any feedback would be appreciated.
> Thanks!
>
>

[Cyrus]

In article <W3BHd.68764$zy6.5884@bignews5.bellsouth.net>,
<steve99@bellsouth.net> wrote:

> Why do you need four?
> Radio shack sells a cooling fan that runs off of 115 volts and its pretty
> quite and five in diameter and cools my modest system pretty well

Sometimes its quieter to have a few smaller going slower than one larger
going full blast. There's no replacement for displacement.

--
Cyrus

*coughcasaucedoprodigynetcough*

[dg]

I use Papst fans (the quietest fan around, period) and a 1.5amp 12VDC
switching power supply from Digikey to cool a server cabinet. 1.5amps is
PLENTY for several fans, though I only use 1 fan. They do the job well.

Switching supplies are the best.

--Dan

"SC" <no_spam@thank.you> wrote in message
news:vH0Hd.43$G33.2974@news.uswest.net...
> I'm want to install four 80mm ultra-quiet computer fans in my
> entertainment center for cooling. I am planning on using a 12VDC
> transformer to power them, but just want to make sure of the size of
> transformer to get. Would a 12V/500mA AC-to-DC power adapter from Radio
> Shack be fine? I'm a little rusty on my knowledge of amps, watts, etc.
> but I think the fans run at 1.2 watts at 12V, so that should be about
> 100mA, right? So, if that's correct, if I wanted to give myself to add
> any additional fans I should probably take the next step up to a
> 12V/1000mA power adapter.
>
> Am I figuring this out correctly? Any feedback would be appreciated.
> Thanks!
>

[dg]

"Cyrus" <invalid@i.like.spam> wrote in message
news:invalid-66C596.14540719012005@newsclstr01.news.prodigy.com ...
> There's no replacement for displacement.
>
Sure there is, its called Forced Induction.

--Dan

[Severian]

"dg" <dan_gus@hotmail.com> wrote in message
news:LdbJd.5482$8Z1.5192@newssvr14.news.prodigy.co m...
>
> "Cyrus" <invalid@i.like.spam> wrote in message
> news:invalid-66C596.14540719012005@newsclstr01.news.prodigy.com ...
> > There's no replacement for displacement.
> >
> Sure there is, its called Forced Induction.
>
> --Dan
>
>

The only substitute for cubic inches is rectangular dollars...