For [Roy's] graduate electronics class, he decided to make something that many in and out of the hacking world would certainly love, an automatic espresso loader. One can choose from three flavors available. In order to accomplish this, a Parralax Propeller board is used to control three servos that regulate the amount of coffee dispensed, chosen by a handy LCD HMI (human machine interface).
After the coffee is dispensed, the chute swings out of the way. A modified inkjet cartridge carrier (from a dead printer) is then used to compact the beans. Check out the video of this machine in action after the break.
Not only is this machine well built with what appears to be a clear polycarbonate shell, It uses other standard hacker fare, including: servos, recycled printer parts, a Parallax processor, and a LCD display. This machine has only been tested with salt so far, and the “valves” are only simple flat plates attached to servos. This machine is still somewhat of a prototype, but it’s a really neat hack nonetheless.