 | | Temperature Sensor —Jonathan Knudsen
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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 (...) (25 years ago, 26-Jul-99, to lugnet.robotics)
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| | | | | Re: Temperature Sensor —Michael Gasperi
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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)
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| | | | | | | Re: Temperature Sensor —Ralph M. Deal
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| | | | | | (...) At one time Radio Shack sold 10K thermistors but I have not checked lately. Don't remember their temperature coefficient. I do not know the Mouser source. Pardon me if this is an(*) FAQ but could you let me/us know how to contact Mouser? (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
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| | | | | | | | Re: Temperature Sensor —Michael Gasperi
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| | | | | | Ralph M. Deal <lego-robotics@crynwr.com> wrote in message news:Pine.GSO.4.05.9...zoo.edu... (...) Radio Shack still sells the 10K thermistor. Mouser is at www.mouser.com The part is at the following url: (URL) description of the part is on the (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
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| | | | | Re: Temperature Sensor —Jonathan Knudsen
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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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| | | | | | Re: Temperature Sensor —Michael Gasperi
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| | | | Jonathan Knudsen <lego-robotics@crynwr.com> wrote in message news:3.0.5.32.199907...net.com... (...) You might try a trim pot in place of the 2.2K and set the room temperature to be the correct value. You could later determine the trim pot value (...) (25 years ago, 28-Jul-99, to lugnet.robotics)
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