[mythtv-users] Quiet fans

[Thomas Fjellstrom]

On Monday 20 October 2008, Peter Loron wrote:
> On Oct 17, 2008, at 1:41 PM, Yan Seiner wrote:
> > On Fri, October 17, 2008 1:10 pm, Peter Loron wrote:
> >> Oh, yeah. I just checked my inventory, and I've got temp sensors from
> >> Dallas/Maxim. Analog, and ST Micro in the parts bin. Guess my only
> >> excuse for not doing it now is lack of time.  :-)
> >>
> >> Having the sensor on leads would be nice for checking the temp
> >> someplace the PCB won't fit. Should also be pretty easy to multiplex
> >> some sensors if you wanted multiple readings.
> >
> > You know, if you were to build a few of these, I'd buy a couple or
> > three.
> > Basically, something that can handle 2-3 temp sensors, run up to 4
> > fans,
> > and works off a regular PC power supply.
> >
> > That way you could stick the temp sensors inside the raid array and
> > run
> > the fans based on the max temp in the array.
> >
> > (and a LCD showing the temp, usb interface, drivers... :-)  Just
> > kidding
> > on those.)
>
> I've been tinkering with parts and spreadsheets. Looks like my cost
> (in prototype quantities) for a unit that will programmatically
> control 3 fans (via PWM), have 3 thermistors controlling them, and
> have a 2x20 LCD screen, and USB connectivity would be around $26.
>
> A "dumb" controller with direct temp controlled PWM driven fan headers
> and 3 thermistors would be around $13. No microcontroller, no USB, no
> display.
>
> The fancy controller would have some kind of software that would allow
> you to monitor the status of the fans, adjust the speed<-->temp ratio,
> etc. The display would also have some programmability.
>
> Thoughts? How much would *YOU* pay?  :-)
>
> Basically if I can determine there is a market worth my time, I'll see
> what I can do.
>
> -Pete

I have so been meaning to build the same sort of thing :( I'm not willing to 
pay what most commercial outfits want for their fan controllers.. If the LCD 
can also be made to take custom stuff with lcdproc or something similar, I 
think it might be worth $40 to me :o

>
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-- 
Thomas Fjellstrom
tfjellstrom at shaw.ca