[clug] ATX system fan connectors

[Ian]

Hi there

On 02/04/07, Michael Still <mikal at stillhq.com> wrote:
> Hi.
>
> I've just finished getting the front LCD panel and remote control
> working on my new Zalman HD160 media center case. Now I want to do
> something about the noisy 2 * 80 mm system fans. The problem is, I know
> nothing about variable speed fan control.
>
> So, I want some sort of thingie that takes the system fan connector on
> the ATX mother board, and uses that to spin up or down the case fans
> (which can be powered from four pin molex).
>
> Do such things exist?

If you are after a completely software solution to the problem, then I
think that you probably want to install lm-sensors which includes a
shellscript called fancontrol. Once installed you use pwmconfig to
calibrate the fans (it adjusts the voltage and looks for which fan
slowed down, then it goes through a bunch of voltages asking you when
the fan stops completely, and when it starts again).

For reference, my /etc/fancontrol looks like this:
INTERVAL=10
FCTEMPS=9191-0290/pwm2=9191-0290/temp2_input
FCFANS= 9191-0290/pwm2=9191-0290/fan2_input
MINTEMP=9191-0290/pwm2=0
MAXTEMP=9191-0290/pwm2=60
MINSTART=9191-0290/pwm2=100
MINSTOP=9191-0290/pwm2=95

temp2 and fan2 being the temp of the CPU temperature and CPU fan
respectively - I don't have additional fans on my case (really should
get some), so I haven't actually tried with 2 or 3, but I believe it
is possible.

Then, I just added
fancontrol & disown
to my /etc/rc.local file (since the package didn't come with startup
scripts, and I didn't feel like doing anything more complicated than
that).

>
> ObLinux: it's a MythTV machine of course.
>
> Mikal
> --
> linux mailing list
> linux at lists.samba.org
> https://lists.samba.org/mailman/listinfo/linux
>

Cheers,
Ian

-- 
On the day *I* go to work for Microsoft, faint oinking sounds will be
heard from far overhead, the moon will not merely turn blue but
develop polkadots, and hell will freeze over so solid the brimstone
will go superconductive.
     -- Erik Raymond, 2005
--
Hi! I'm your friendly neighbourhood signature virus.
Copy me to your signature file and help me spread!
--
Please avoid sending me Word or PowerPoint attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html