Working with solenoids

What we are going to make is an automation system that will water your plants whenever they need it. So technically, once it is set up, you don't really have to worry ever about watering your green creatures. Whether you are at your home, at the office, or on a vacation, this will keep doing its job no matter what. 

Now, you must be wondering how it will water the plants, so let me tell you, for every problem in this world, there exists a solution. In our case, that solution is called a solenoid valve. What it essentially does is switch the flow of liquids. There are various solenoid valves available in the market; some of the identifying features are as follows:

• Size: They come in various sizes such as half an inch, three quarters of an inch, 1 inch, and so on. This basically will determine the flow rate of the solenoid valve.
• Medium: Whether...