This project is a housing device for household plants to allow for controlled watering on rainy days.  Instead of having a to remember to water your plants, a microphone sensor will detect the sound of rain hitting against a roof.  When the threshold is reached, the arm will move out and allow the plant to receive a certain amount of water before retracting.  

Future iterations of this project can include different parameters such as how much water a plant receives, shutting the device off after the plant is watered a certain amount of times, and prevent the device from operating if it is raining too hard.  Constructing the device out of different materials such as acrylic plastic could be another potential change as well. 

Materials:  Plywood, microphone, wires, Arduino, servo motor