I'm trying to create a system involving a soil moisture sensor and an eletronic valve. I have seen some projects on the web using water pumps and other equipments. I would like to build a simple project to irrigate the plants on my home. I'm thinking on using some system using the power of gravity. Have some container above the plant with a hose to direct the water to the vase. I'm trying to find the best hardware to aid me in this mission but without any lucky so far.
The sensor would be in the vase and there would a hardware to open the valve so that the water could fall down to the vase. I thought about using a ServoMotor to control the OPEN/CLOSE of the water flow but the ServoMotor isnt fast enough to shut down the water in milisecond since when you open the valve the gravity will make a lot of water run down.
My question to you is: What piece of hardware or ingenious way I can acomplish this task? I'm a newbie in the world of Arduino. This is my third project so far. Be easy on me :) :)