I don't know much bout electronics so I chose to use a "Gardena Soil Moisture Sensor" which is designed to be an add-on for the Gardena irrigation computers/controllers.
Well I'm not going that route, I just want to connect it upto a electric valve to stop the flow of water to my plants.
The sensor is powered by 2 1.5v C batteries, with my DC meter there is no voltage shown, but switching it to 20K OHM gets a reading.
When the soil is wet = 0 OHM
When the soil is dry = 9.97 OHM
So what's the easiest way to apply power to a 12vDC electric valve when the soil is dry, in laymans terms so atleast I know what to google/research.
Thanx, your help will be much appreciated.
Well I'm not going that route, I just want to connect it upto a electric valve to stop the flow of water to my plants.
The sensor is powered by 2 1.5v C batteries, with my DC meter there is no voltage shown, but switching it to 20K OHM gets a reading.
When the soil is wet = 0 OHM
When the soil is dry = 9.97 OHM
So what's the easiest way to apply power to a 12vDC electric valve when the soil is dry, in laymans terms so atleast I know what to google/research.
Thanx, your help will be much appreciated.
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