Any Temp. Sensor with an object in OBEX?

Philldapill

I'm looking for a temperature sensor that already has a driver for it in the OBEX, that is half-way decent, and hopefully I can get as a free sample from TI, STMicroElectronics, or similiar. This will be going in a product I'm making and would like to add temperature sensing to it. Due to this being a semi-commercial product, I'd like to keep the cost below or around $1.00 a chip.

Any suggestions?

grasshopper

Depending on the degree of precision you can selsect from these

www.microchip.com/ParamChartSearch/chart.aspx?branchID=9001&mid=11〈=en&pageId=79
focus.ti.com/paramsearch/docs/parametricsearch.tsp?family=analog&familyId=611&uiTemplateId=NODE_STRY_PGE_T

www.parallax.com/Store/Sensors/TemperatureHumidity/tabid/174/CategoryID/49/List/0/Level/a/ProductID/84/Default.aspx?SortField=ProductName%2cProductName

Also making an object would be a piece of cake. Look at the basic object it has all you need to communicate to other ic's.

Post Edited (grasshopper) : 12/26/2008 3:54:40 AM GMT

ElectricAye

Phil,

the object for the DS18B20 is buried inside the OneWire object, I think. There's also a SpinOneWire version (from Micah Dowty), if I recall. But if you use either one, there's a minor mod you need to make to the code so it gives negative temperatures.

See

http://forums.parallax.com/showthread.php?p=769252

Problem is, those sensors are well over $1.
If the economy keeps crashing, though, you might be in "luck".

Javalin

There is a i2c DS1621 object in the "i2cObjectsV2" in the library. Basic object, but can be expanded.

James

Paul

I've used a NTC 10k thermistor in an R-C arrangement. very cheap. I've been wondering about using the prop's log table to straighten out the curve some how. Just haven't had the time.

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Goran (Sweden)

Here is a test with the DS120 and DS2760 which reads up to 8 sensors on the same Data pin

Made some minor tests, se inside.

Its a cut and paste from several codesnippets from OBEX and some mods made by me.

It will be part of a tempmonitoring instrument for my homebuilt aircraft engine.

G