AVR-Chat

--- In AVR-Chat@yahoogroups.com, Sandu Teo <teodorstv@...> wrote:
 
> For my project, I need low accuracy. 

That's what I figured. So, are we done here? Do you have what you want 
from us? I think it's clear you need corrosion proof contacts, such as 
stainless steel. I'm suggesting you embed them in gypsum to separate 
them to some degree from the soil itself. We all agree this will meet 
your need for low accuracy.  Are you OK with this, because I don't 
think we're going to come up with anything cheaper (another of your 
requirements).

See also http://www.circuitcellar.com/fi2003/F2002.htm
and http://www.circuitcellar.com/renesas2005m16c/winners/1566.htm

Graham.