In the past few years, we have covered a bunch of awesome Raspberry Pi projects. The Pi Fighter is also worth a look. It is a smart boxing bag that gamifies training. It relies on a Raspberry Pi to treat players to a fighting video game. The Pi unit translates the acceleration of the heavy bag into number of health points to be deducted from the opponent.
Richard Kirby’s Pi Fighter simply shows what you can do with these affordable dev boards. More information is available here.