[Cialug] OT USB thermometer

[Morris Dovey]

On 2/17/13 9:37 AM, Zachary Kotlarek wrote:
>
> On Feb 17, 2013, at 5:59 AM, Dave Weis <djweis at internetsolver.com> wrote:
>
>> Does anyone have a recommendation for a USB thermometer? I looked online and they appear to vary wildly in cost and quality. I would like to stay around $20, it's for an elementary science fair project.
>
>
>
> This may or may not be useful for your specific need, but...
>
> There a number of different 1-wire temperature sensors available in the $2-$5 price range. You'll need a bus adapter (~$30 for a USB interface) to hook them up to a computer, but you can connect a very large number of sensors on the same bus if you want to read the temperature in more than one place.
>
> There's good linux support for both the bus in general and the temperature sensors specifically -- owfs (http://owfs.org/) provides a filesystem interface in the style of /sys to communicate with 1-wire devices. The owfs website also has good recommendations for other types of bus masters, should you prefer an Ethernet or I2C or other interface.
>
> USB bus adapter:
> http://www.ibuttonlink.com/products/linkusb
>
> Temperature sensor:
> http://www.maximintegrated.com/datasheet/index.mvp/id/2815
>
> 	Zach

If this is an option for you, I have an old (retired) web page at 
http://www.iedu.com/DeSoto/xMisc/Instrumentation/ illustrating some of 
what Zach is talking about.

Morris