RE: temperature controlled pc fan

["Ian Davidson" <ian@xxxxxxxxxxxxxxxx>]

Hi Paul

Just buy a thermostat from your electrical supplier. They do sell them the
opposite way around to normal heating type stats. Just a pair of contacts
close at what ever temperature you set. We use them in our transmitter
racks
and we also have a large fan switched on one of these to circulate the air
in the building if the temperature rises to high.

Ian D


> -----Original Message-----
> From: Paul Robinson [mailto:ukcueman@xxxxxxx]
> Sent: 03 July 2004 02:16
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] temperature controlled pc fan
>
> My node zero is in the loft. On the hottest days, it's too hot in
there
for anything to
> work reliably. So I have a rack which has a PC fan installed in the
back,
with a duct to
> the soffet where I hope (once it's running) it will be able to pull in
sufficiently cool
> air to keep the air in the rack cool enough. What I'd like to do now
is to
have this
> switched so it's either on only when the temperature is above some
threshold, or so that
> the speed changes with the temperature.
>
> I've found a suitable kit on maplin's (http://tinyurl.com/yt4yc) for
on/off control, and a
> circuit for speed control
(http://www.overclockers.com.au/techstuff/a_thermalfans/),
but
> does anybody know of a product in non-kit form so I can leave the
soldering iron in its
> box?
>
> Thanks,
> Paul
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>