[UPDATE 06-29-2014] This technique has been refined and even better photos are in this post

These are splash pictures taken using a Raspberry Pi as a controller. These aren’t your typical water-dripping-into-a-pool photos, they’re actually made by placing a drop of liquid on a speaker and blasting it with sound! Sure, you could control everything pretty easily with discrete electronics, but this sounds like a good use for a Raspberry Pi.