It may not use water recycled from your air conditioner, but this compact self-watering solution is perfect for any size garden. It's extremely simple, too (apart from the Arduino, perhaps), and ...

What happens when an engineer builds a smart garden? This Arduino-powered system automates watering while collecting real-time data on soil moisture, temperature, and sunlight. From sensor ...

The Arduino Plant Watering System is designed to automatically supply water to your plant's soil once its moisture level falls below a particular point.

Irrighino is a complete watering system based on the Arduino Yun, featuring a user friendly AJAX interface. This allows scheduling in a manner similar to creating appointments in Outlook.

In addition to the timer settings there is a manual watering switch as well. He used a typical mains light switch, wiring it with a pull-down resistor to make it work well with the Arduino.

Learn to build an A-frame vertical rain gutter garden system with an automatic watering setup. I designed this project in 3D using Google Sketchup.