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Date:         Mon, 28 Apr 2003 13:30:49 -0700
Reply-To:     laurasdog@WEIRDSTUFFWEMAKE.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Steve Delanty <laurasdog@WEIRDSTUFFWEMAKE.COM>
Subject:      Re: Custom Gauge Installation Options?
In-Reply-To:  <20030428151632.D10851@gull.us>
Content-Type: text/plain; charset="us-ascii"; format=flowed

David Brodbeck wrote:

>On my '75, I had a home-made digital temp gauge. I used an LM34 >"Precision Fahrenheit Temperature Sender", which costs a few bucks. The >great thing about this sender is that its output voltage is simply the >temperature in degrees F times 0.01V. It's accurate to +/- 0.5 degree. > For a readout I used a digital LCD panel voltmeter, with the decimal >point wired to be two places to the right of where it normally would be -- >this gave a direct readout in degrees F. The sender comes in several >formats; I used the version that's in a TO-92 transistor case. This was >an aircooled engine, so I glued the sender between the fins at the bottom >of the oil sump. It worked pretty well.

LM34 is a great part! I've used the little devils before. Add a dirt cheap digital voltmeter. (Harbor Freight often has them for under $5) and you've got a nice digital tempertaure gauge... The LM34 is good from -50F to +300F, which is plenty for a cooling system. The TO-92 case is plastic. The TO-46 metal can might be better for adapting to cooling system.... maybe.

For anyone interested, here's the data sheet for them:

http://instruct1.cit.cornell.edu/courses/ee476/labs/s2003/LM34.PDF

Steve '86 Westy


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