<div dir="ltr"><div class="gmail_default" style="font-family:arial narrow,sans-serif">Some of these people might be able to help:<br><a href="http://www.counterculturelabs.org/contact-us/">http://www.counterculturelabs.org/contact-us/</a><br>

</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Aug 1, 2013 at 2:20 PM, Carlos Castellanos <span dir="ltr"><<a href="mailto:carlos@ccastellanos.com" target="_blank">carlos@ccastellanos.com</a>></span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi gang,<br>
<br>
I would be very grateful for any advice, references, etc on the subject of measuring plant voltages. I'm thinking a GSR circuit using a wheatstone bridge and op-amp will do but I would appreciate any schematics/diagrams, etc<br>


<br>
I would also like to see discussion of parameters, variables, most galvanically active plants, etc. I am particularly interested in measuring voltages in wetland/marshy areas.<br>
<br>
Any suggestions concerning other (simple) techniques for real-time feedback from plants would be appreciated.<br>
<br>
Thanks!<br>
-Carlos<br>
<br>
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</blockquote></div><br></div>