Can anyone help me with designing a circuit diagram for a project?
I am creating a self watering system for plants. I have found a diagram for a water detection circuit which illuminates an L.E.D when there is enough water in the soil. However, I would like to modify it so it activates a servo to open a pinch valve then when there is enough water it returns the servo to it's original position. I have 3 problems. The first problem is I'm not sure how to create the circuit that activates the valve. I know I need a micro controller and a servo, however, I have no idea of the exact components I need or how to wire them up. My second problem is that I don't know how to integrate the two circuits together. My final problem is I'm unsure of how to program the micro controller.
Here is the water detection circuit diagram. http://www.electronic-circuits-diagrams.com/homegardenimages/3.gif
Any help would be greatly appreciated.