I got my starter kit and I'm getting together the components for my irrigation valve project. My question is whether or not i need the Arduino for this. I am using two float switches to monitor the water level in a tank. When the bottom switch opens, I want a sprinkler valve (e.g., Rainbird, Orbit) to open (via a relay) and fill the tank until the top switch closes at which time the valve closes. Do I need to dedicate my Arduino to this project and get another one for the next project? Or, should I hard wire the circuit?