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I recently added a 1-wire thermometer network, using the 1-wire USB adapter (DS9490R), temperature sensors (DS18S20), speaker wire, and audio plugs, jacks, and splitters.
A smaller version of this graph is shown on my Insteon thermostat web control page.
The temperature sensors seem to be very accurate (well, precise, at least). They're digital, so no calibration required (they are factory calibrated, I assume). And with 1-wire technology, you can string lots of them on one common data line (and ground, so it's actually a 2-wire system, but who's counting).
The sensor for the blue graph is run up inside one of the A/C vents, so I can get a direct indication of the A/C output. As you can see, it does about 1-2 cycles per hour. (I bumped the thermostat up from 78 to 80 around 10am.)
The outside sensor is hanging out the window by my computer, in the shade of the bushes and the big tree out front, so I don't think direct sunlight is affecting it much in the afternoons.
Oh, and this image is from a custom-made graphing page from the temperature logs using PHP and GD. Temperature logging is done by digitemp every 15 seconds.
An old thermometer on my Mamaw Ruby's porch. It wasn't a cold day but thankfully cooler than it has been being.
Got bored again, trying to figure out what to shoot. This is one of those Galileo Thermometers and fiber optics
It's been ages since I've photographed my Galileo Thermometer. I had wanted one of these for some time and finally got one earlier this year. Today all the little bobbles are up at the top of the thermometer signifying a cooling trend.
This Pepsi thermometer is on Main Street, U.S. Route 61 Business in LaGrange, Missouri in Lewis County.
The thermometer named after him is made up of a sealed glass cylinder. Inside there is a clear liquid and a series of bulbs. Each bulb has a weight attached to it. As the temperature changes, they rise and fall depending of a number of mathematical principles. Yet the Galileo Thermometers has an aesthetic that goes beyond its function – it is a beautiful object in its own right
Autor: Society of Gentlemen
Descripción bibliográfica: A new and complete dictionary of arts and sciences : comprehending all the branches of useful knowledge, ... Illustrated with above three hundred copper-plates, ... The whole extracted from the best authors in all languages / By a society of gentlemen. - The second edition, with many additions, and other improvements. - London : printed for W. Owen, 1763-64. - 4 v. (1064,1061-3506 p.), il.: lám. ; 8º
Notas: Grab. calc. representando a Minerva: "S. Wale invt. et delin., C. Grignion sculp."
Localización: fama.us.es/record=b2656185~S5*spi
Vea la ilustración en su contexto
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This little thermometer works on the density of liquid. Read about it here: en.wikipedia.org/wiki/Galileo_thermometer
Nikon FM2n
Nikkor-O 35mm f/2 Ai converted
Ultrafine Xtreme 400
This thermometer used to hang in the attic of my grandparents' house in suburban Long Island and is now on the landing of my apartment in Brooklyn.
This photograph comes to you by courtesy of the letter T, my twentieth picture for the February Alphabet Fun: 2024 group.