Make:

Punch out your designs with the Fluidforms Cassius punching bag sculpture maker, Arduino based too!-

The Fluidforms Punching Bag contains a matrix of 9x7 force sensors that measure the force exerted by a blow to the punching bag. The sensors are plugged into an Arduino board that sends the values over USB to a computer using the MIDI protocol. The Computer is running a Processing sketch that receives the MIDI packets and writes the current state of the sensors to a folder in a “|” separated format. An OpenGL render then reads these text files and graphically represents the current state of the punches to the bag since the last reset.