hi, i'm building a project that if the soil humidity is low the sensor will send me signal!!
if any one can help me for the right sensor!!! to use in my circuit!
You can buy increasingly accurate and reliable devices starting at ~$4 USD and moving up to several hundred dollars. The cheap ones all use the conductivity approach already mentioned, and you can build your own if you want. More costly meters use other means. The ultimate would be a laboratory measurement of water activity.it's for crop irrigation, is there more simple thing like i don't know a chip!
by Jake Hertz
by Jake Hertz
by Jake Hertz
by Duane Benson