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Location:
Land of Oz
Registered:
June 2004
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Re: Who can help with building a temp gauge?
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Wed, 04 May 2005 11:45
 
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Hi,
Just re-read the posts and Wilbos idea isn't a bad idea, but, like some of the other ideas presented, you'll have to tweak the cct (probably constantly) to allow for varying output of the temp sensor due to allow for temp variance. As the sensor circuit warms and cools it's output linearity will change and therefore change your final reading. The Dallas chip, I beleive, is self-compensating.
However, expanding on Wilbos idea, you purchase a cheap DMM (Digital Multimeter) that has a temp selection on it and just hook it up to your equipment or whatever. Remove the batteries from the DMM and connect it to a small plugpack to provide the power (saves you on batteries also). These DMMs aren't very expensive and Jaycar has some in theie catalog. They're pretty accurate and you just gotta make sure you get one that doesn't have an auto-cutoff so it will stay on all the time. In any event, there's ways of getting around the auto-cutoff and provide a small timed-switching circuit with a 555 and a few components. Getting smarter you can also have a couple of inputs and switch them so the DMM reads the temp of equipment-A for a few secs, then the input is switched so it reads equipment-B for a few secs, and then back to A and so on.
If you need something that alerts you when the temp exceeds a certain limit, then you're better of with the 1620/microcontroller solution.
seeyuzz
river
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| | Subject | Poster | Date |
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Who can help with building a temp gauge?
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clubagreenie | Tue, 03 May 2005 04:55 |
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Re: Who can help with building a temp gauge?
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EnFlaMEd | Tue, 03 May 2005 10:35 |
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Re: Who can help with building a temp gauge?
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ndgcpr | Tue, 03 May 2005 11:50 |
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Re: Who can help with building a temp gauge?
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Toobs | Wed, 04 May 2005 04:34 |
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Re: Who can help with building a temp gauge?
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clubagreenie | Wed, 04 May 2005 09:13 |
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Re: Who can help with building a temp gauge?
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wilbo666 | Wed, 04 May 2005 11:15 |
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Re: Who can help with building a temp gauge?
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Cool1 | Wed, 04 May 2005 10:38 |
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Re: Who can help with building a temp gauge?
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river | Wed, 04 May 2005 11:27 |
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Re: Who can help with building a temp gauge?
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river | Wed, 04 May 2005 11:45 |
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Re: Who can help with building a temp gauge?
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clubagreenie | Wed, 04 May 2005 12:46 |
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Re: Who can help with building a temp gauge?
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river | Wed, 04 May 2005 22:44 |
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Re: Who can help with building a temp gauge?
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ndgcpr | Thu, 05 May 2005 01:49 |
