Learn about Hunter's battery operated sprinkler controller - Node. The Node controller requires the use of DC latching solenoids. To create a program on the Node sprinkler timer you will need a start time, run time, and day to water. To get started, learn about the buttons on the Node sprinkler clock. To turn the Node display on, hold any button down. Use the arrow buttons to navigate through the settings, the plus and minus buttons to adjust a given option, and the center button to change the page or advance to the next feature.