Subject:
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Re: Temperature Sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 28 Jul 1999 12:13:37 GMT
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Original-From:
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Ralph M. Deal <deal@kzoo/ihatespam/.edu>
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Viewed:
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759 times
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On Wed, 28 Jul 1999, Michael Gasperi wrote:
> 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
> thermisiter with a either a trim pot or a fixed 2.2kohm resistor in series.
> A thermister with this resistor in series would need a -4.4%/C Temp Coef to
> fit the RCX and this is an available part. (Mouser 527-0503-10k) The Radio
> Shack thermister with a 2.2kohm resistor in series isn't too bad either.
> The RCX will read 25C at 25C and be off a little everywhere else since the
> Radio Shack has a lower Temp Coef of 3.7%/C to start with and the 2.2kohm
> only makes it worse. I've never tried the Mouser part but it looks like a
> good fit to me.
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?
Thanks, Ralph M. Deal, Chemistry Dept. Kalamazoo College
deal@kzoo.edu
* if pronounced F - A - Q, then an, if pronouced 'fak', then a. I use the
first; anyone use the latter?
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: Temperature Sensor
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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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Message is in Reply To:
| | 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)
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