My grandparents needed a system to water their planter boxes when they were away from their apartment,
but without a hose on their balcony, they would need to use a bucket instead. I built a system that could
turn on an aquarium pump for a user-specified amount of time once every 24 hours (my first HDL project!)
and etched a PCB for it. The PCB is potted in 5 minute epoxy for waterproofing, and it used a Xilinx Coolrunner II
CPLD.