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#11 |
Lex Parsimoniae
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
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![]() Wow, I read this and felt guilty for letting my little Armite micro project sit dormant all summer..
![]() Check out my heat sensors up top. I epoxied the heat sensors inside of metal tubes and made them look like blasting caps!! ![]() Anyways, the built-in basic does not have floating point, so it's a PITA for a non-programmer like me. Maybe I'll get back on it after the snow comes.. ![]() |
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#12 |
Lurking Renovator
Join Date: Jun 2009
Posts: 27
Thanks: 2
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![]() Thanks for posting this picture!
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#13 |
Lurking Renovator
Join Date: Sep 2009
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![]() Question about the SparkFun Electronics logger.
How hard is it to setup how often it logs data? Can I set it up to log every half hour? With this rate how long before it filled up the data card? |
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#14 |
Lex Parsimoniae
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 115
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![]() Are you thinking about getting an ARMite unit?
Dealer: Coridium Corporation - Programming Example program info: EE20N: Hacking Stuff (Wtr'08) — SOEL |
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#15 |
Lurking Renovator
Join Date: Jun 2009
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![]() I have a question Xringer, did you have a particular reason you mounted it to a sheet of metal? Didnt know if you trying to shield it or some other reason other than you had a piece of sheetmetal and it seemed the thing to mount it to.
![]() I have a finished basement and the temperature range from downstairs to upstairs can be significant. I would like to gather some data and see if it is as much as I think it is, or if it would be worth it to rig some kind of switch to run the fan to circulate air. |
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#16 |
Lex Parsimoniae
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
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![]() The metal sheet was used to give the parts a solid platform.
I wanted to install this down in the basement, so I used a plastic storage box (like Tupperware) as a dust cover. Mounted the PCBs on aluminum and bolted the sheet and connection strips on the inside of the storage box cover. I will screw the cover onto the wall, and the 'bottom' of the storage bin will just clip onto the cover. I'll cut some notches for the I/O wires. I also got one of these.. SparkFun Electronics - Serial Enabled 16x2 LCD - Red on Black 3.3V Want to display temperatures upstairs. ![]() |
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#17 | |
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
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![]() Quote:
You can change the logging interval to log around 250 tumes per second (more if you log fewer inpits) to 1 log per second by changing a text file which is read at boot up. You'd have to modify the firmware to include some wait state loops, which is not a huge deal, but with all my projects was just too much resistance. As microprocessors go, the arm is a good one and pretty powerful, but overkill if you want to read data at 30 minute intervals. This is actually what I wanted to do. There's the AVR butterfly, which I think would be better. You should check out this link. And then this link. Runs seven years on a tiny battery. I think this is the answer to your prayers. Regards, -AC_Hacker |
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#18 | |
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
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![]() Quote:
You can change the logging interval to log around 250 tumes per second (more if you log fewer inpits) to 1 log per second by changing a text file which is read at boot up. You'd have to modify the firmware to include some wait state loops, which is not a huge deal, but with all my projects was just too much resistance. As microprocessors go, the arm is a good one and pretty powerful, but overkill if you want to read data at 30 minute intervals. This is actually what I wanted to do. There's the AVR butterfly, which I think would be better. You should check out this link. And then this link. Runs seven years on a tiny battery. I think this is the answer to your prayers. Regards, -AC_Hacker |
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#19 |
Lurking Renovator
Join Date: May 2010
Location: Garland, Texas
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![]() The least expensive datalogger I have found is an OM-44 from Omega Engineering for $104. Temperature sensors for this logger are $33 (OM-40-C-HT-B). Omega also has a wealth of free tech literature about measurements and data acquisition. The OM-44 does not yet have a Windows 7 driver. I have several OM-44 set aside for field testing my WarmSpring pool heaters. A small cheap data acquisiton system worth considering is a DATAQ DI-194RS. DATAQ offers these as very inexpensive start-up kits. Unlike the dataloggers, this data unit cannot stand alone; it has to be connected to a computer. For small signals, like thermocouples, the signal will have to be amplified to give good resolution for the data aquisition system's 0-10 V measurement range.
After pulling my hair out for years trying to get rid of noise on thermocouple signals, I now favor RTD's and temperature sensing integrated circuits such the Analog Devices AD-592. These transducers are inherently less susceptible to noise. |
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#20 | |
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
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![]() cmroseberry,
Quote:
Also available is 1-wire sensors. They are accurate, and can be easily interfaced to an Arduino. In fact, 1-wire interface code is included in the Arduino development system. -AC_Hacker |
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Tags |
butterfly, data, logger |
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