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source= http://www.piclist.com/piclist/2003/12/02/221921a.txt?

James NickSears wrote:

I am using a 16F877 uC with a Maxim voltage reference IC to take samples
from an IC temp sensor in a stainless steel pipe nipple with both ends
capped buried in a large compost pile.  The 877 sleeps most of the time,
waking up once per second to increment time and see if a sample needs to be
taken, etc.

- ----
Some time ago, I monitored my own compost pile.  I cut down a length of
(living, supple) bamboo and made a cutout about an inch above the
septum.  I filled the cavity with water to stabilize the temperature at
reading time, slid a thermometer inside the inter-septum cavity, cut a
point on the end of the rod, and placed at the depth I wanted.  The pile
was about 6' x 6' x 4'.  It stayed fairly stable at 70C, so long as I
replentished the pile's evaporation loss.


- ---
Aubrey  McIntosh
http://www.piclist.com/member/AM-vima-Y84
PIC/PICList FAQ: http://www.piclist.com


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