Re: [Gumstix-users] Temperature sensor interfacing

[Marc N. <gee...@gm...>]

Go 1-Wire, as suggested -- will make your life much easier and there're
Perl, device driver, and other ways to integrate them into your apps.

-marc

On 7/12/06, dfo...@ya... <dfo...@ya...> wrote:
>
> Laker,
>
> You don't say if the sensor is for remote or on-board use or what voltages
> you're using or what temperature range you need.  If for on-board use, take
> a look at the http://www.national.com/ds/LM/LM94021.pdf (available at
> Digikey).  By using the high gain mode, you can connect it directly to the
> UCB1400 analog inputs.  For remote use, look at the LM61.  Note that you
> need a sensor with a fairly high gain to make it work with the 10-bit, 7V
> analog inputs on the UCB1400 and get decent resolution.  I'll be looking at
> getting this to work software-wise soon but I suspect everything needed is
> already present in the current driver set.
>
> If you want to stick with one-wire sensors (perhaps you need many sensors
> for your project), they can be connected to a serial port with very little
> effort - take a look at
> http://www.maxim-ic.com/appnotes.cfm/appnote_number/214 and
> http://www.maxim-ic.com/appnotes.cfm/appnote_number/126
>
> for how to use a regular UART (works well if a bit labor intensive but low
> cost) or use a dedicated serial-to-1 wire bus interface chip*:
>
> * http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2923
>
> Dan
> *
>
> *
> Laker Netman wrote:
>
> Hi all.
> I'm interested in attaching a temperature sensor to
> either my 4mb connex or audiostix2 (FWIW, the gumstix
> is currently connected to the audiostix2 and
> preferably should stay that way).
> I have been looking through Maxim's offerings and they
> seem to have what I want, specifically
> http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4576
> Anyone have experience with this type of project?
> Caveats, words of wisdom?
>
> Thanks,
> Laker
>
>
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