Automatic Water Tank Pump Switch Hardware • Microcontroller Unit: The designed circuit shown here includes an Atmega328P-PU as the kernel, a number of LEDs to display the system status, a push button ...

As soon as the moisture level reaches upwards of 70%, the Arduino stops the water pump. This controlled water flow ensures the plant never gets too much or too little.

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 ...

The top of the frame has eight nozzles, each fed by its own pump. An Arduino controls the pumps and the lights making it possible to create different motion effects by adjusting how events line up.