Sparks wrote:
:: I am in the middle of installing a whole garden irrigation system.
::
:: I want to build a controller for this, but need some kind of
:: moisture sensor (digital if possible, to flag when the soil needs
:: watering)
::
:: Any ideas on where I can either buy some, or plans on building them?
::
:: Sparks...

there's one here for £56, but it's for a specific watering system...
http://www.ukweathershop.co.uk/acata...s_vpparts.html

these are retailers and wholesalers of this kind of thing:
http://www.delta-t.co.uk/frame/submenu/soil.html

http://www.icselectronics.co.uk/icsn...l_moisture.htm