| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| donblair | "Yay, data!! Neat observation about the battery voltage and the temperature. Makes me want to compare the rate of battery voltage drop to the temp..." | Read more » | over 8 years ago | |||
| kinasmith | "Nicely done, and nice temps for such a small pile too! I'm curious to see how long they can sustain that heat. I've done some work with compost in ..." | Read more » | over 8 years ago | |||
| david-days | "I imagine so (regarding the grass). If it's fairly fresh, there's probably enough water content to feed the bacteria as things break down. We use..." | Read more » | over 8 years ago | |||
| cfastie | "Thanks David, I wish I had some of your manures to spice up my pile. I'm surprised at how hot this pile is without the addition of any N-rich mater..." | Read more » | over 8 years ago | |||
| david-days | "Excellent work, @cfastie! I live on a farm in Ohio, and we use cleanup from the chicken house and the horse/goat barns to make our compost piles. ..." | Read more » | over 8 years ago | |||
| cfastie | " I kinda like the switch on the Riffle and now I know that it is something to pay more attention to. But I guess it adds much more complexity that ..." | Read more » | over 8 years ago | |||
| donblair | "Chris, This is such a beautiful project! The lapse rate calculation is so fun to see. Quick reactions: That power switch goof is annoying. I w..." | Read more » | over 8 years ago | |||
| ggallant | "D5 appears to connect the INT/SQW on the RTC to PD5 on the CPU. I would be very interested in how one uses the feature. I'm assuming that it requir..." | Read more » | over 8 years ago | |||
| mathew | "The RTC can be set to shutdown and wake the AT328P, it just uses another pin that could be used for a sensor. @donblair left an exposed pin availa..." | Read more » | over 8 years ago | |||
| ggallant | "Chris, I really don't know the actual time but assuming 800usec (nice for the math) to sleep and wake up it would be 800 / 8,000,000 or 0.01% whi..." | Read more » | over 8 years ago | |||
| cfastie | "George that's a good point. Although the real time clock is running all the time, it is not smart enough to do something as complicated as setting ..." | Read more » | over 8 years ago | |||
| ggallant | "I think 8 seconds is the "maximum" interval with a 16MHz crystal. You wake up every 8 seconds and can go back to sleep if there is no work to be do..." | Read more » | over 8 years ago | |||
| cfastie | "Don thinks that eight seconds might be the minimum interval during which the system can be put into deep sleep. So all the sleep stuff happens in m..." | Read more » | over 8 years ago | |||
| ddileona | "Cool! One question: I thought I read in the riffle documentation that you could only log in multiples of 8 seconds. That seemed liked a weird mult..." | Read more » | over 8 years ago | |||
| cfastie | "Hi Gretchen, I also wondered whether the change in logging frequency was caused by the Riffle dropping below 0°C. There is more about that possibi..." | Read more » | over 8 years ago | |||
| gretchengehrke | "Interesting! At first I was wondering if the change in time-step occurred after the Riffle reached 0 deg-C, but then when I looked at your data tab..." | Read more » | over 8 years ago | |||
| donblair | "Hi Chris! This is fantastic research. So many interesting questions coming up already via your testing. Thank you. Riffleman! These rechargeabl..." | Read more » | over 8 years ago | |||
| mathew | "I'm wondering if it just has to do with the power switch setting. it should be on "USB/Lith" for programming. " | Read more » | over 8 years ago | |||
| mathew | "I wonder about the erratic battery readings. fascinating. Chris-- which sensors do you want to attach? perhaps we can find an arduino tutorial th..." | Read more » | over 8 years ago | |||
| EdMallon | "After two successful deployments of our temperature chains I can confirm that my heat-shrink and epoxy sensor mounting method goes the distance und..." | Read more » | over 8 years ago | |||
| EdMallon | "@ cfastie: To be honest I probably would have started with Geir Andersen's shield to if I had known about it back at the beginning of my project. A..." | Read more » | almost 9 years ago | |||
| donblair | "Oh gosh -- Chris, thanks for tagging me in this thread -- I had no idea that this existed! Wow, Ed -- what amazing work you've been doing!! It's ..." | Read more » | almost 9 years ago | |||
| cfastie | "Thanks for the tip about cheaper SD card modules and RTC modules. I see now how you made your pro-mini logger for $13.00. One of those sensors I l..." | Read more » | almost 9 years ago | |||
| EdMallon | "Not sure about that Arduino clone, as I don't know about the chips it's using. But for less than 4 bucks just try it and see. Just don't expect the..." | Read more » | almost 9 years ago |