I am looking for information for constructing a simple garden soil moisture
meter using a PIC. At the moment I am playing with f873, and think it can
be done using a bit of double sided circuit board as a sensor but I can't
find any information on how to do it.

The simplest method would be to wet/dry signal into a digital input, but it
would be nicer to be able to log changes in moisture using an analog input
(since they are there...!).

Are then any repositories of sensor circuits for the f87x analog inputs
anywhere, such as soil moisture, air temperature, light, humidity anywhere?
I haven't been able to find any (except for some play circuits).

John


_______________________________________________________________________
John Brown
PhD (Clinical Psychology) candidate
                                       Email:  john.brown@anu.edu.au
School of Psychology                  Phone:  (02) 6125-3827
Room 124, Building 39, Psychology     Fax:    (02) 6125-0499
The Australian National University    Mobile: 0429 455 504
ACTON ACT 0200   Web: http://www.anu.edu.au/psychology/staff/BrownJ.htm

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