This project is necessary for people who are using a sprinkler.
Connecting this arduino to your sprinkler system will allow you to remotely turn your garden watering on and off from any web-enabled device. From there you can make it as fancy or as simple as you wish.

Hardware

– 1 x arduino board
– 1 x ethernet shield
– 1 x relay shield
– 1 x 10vDC adaptor (a recycled phone charger)
– 1 x momentary push button

Connect push button to A0,A1,A2. The push button is optionnal, it allows you to cycle manually through the sprinklers.

software

You can download the Source code
– http://www.instructables.com/id/Arduino-Sprinkler-System-Web-control/step3/Arduino-sketch/

How to work it:
– The valves are turned off automagically after 60 minutes (can be modified, time in seconds, 0 disables the functionality).
– The manual button cycles through the valves (and uses A0,A1,A2 for convenience reasons).

Result

Everything else is covered in my previous instructable (here).

• connect the valves.
• use the web interface.
• make the system wireless.

For more information, http://www.instructables.com/id/Arduino-Sprinkler-System-Web-control/