Subject:
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Temperature Sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 26 Jul 1999 16:16:06 GMT
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Original-From:
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Jonathan Knudsen <jonathan@oreilly.comNOMORESPAM>
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Viewed:
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926 times
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Does anyone know the exact characteristics of
Lego's temperature sensor? It's easy enough to
buy a thermistor and hook it up, but I'd like
the temperature readings to be accurate.
I've seen thermistors described by a resistance
at 25 degrees C and a temperature coefficient,
usually expressed as percent per degree C.
Does anyone know what these values are
for the official temperature sensor?
Thanks,
Jonathan
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | Re: Temperature Sensor
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| Jonathan Knudsen <lego-robotics@crynwr.com> wrote in message news:3.0.5.32.199907...net.com... (...) The RCX wants a thermister with 12.2kohms at 25C with a -3.7%/C Temp Coef. This isn't equal to anything I can find. I think it is a 10kohm at 25C (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
| | | Re: Temperature Sensor
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| Mike, You are the man. Thanks for the information. Digi-Key sells two thermistors that match that description. The first is KC003T-ND, for $2.71; it has 1 degree accuracy. The second is KC003A-ND, for $11.50; it has +- .2 degree accuracy. I tried (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
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