Detecting activity on a ping pong table using a Spark Core and a piezo element.

At my workplace, the ping pong table is a hot commodity on long afternoons. Having an automated system detect when the table is active through vibration sensing allows for us all to stay at our desks until the table is available.


Note that this project is mostly a proof-of-concept until the Spark Photon is released, which enables true low-power modes with interrupts on pins.