Something useful
How about a coffe maker?
Grind the beans on demand.
Measure the grounds based on user input (strong, weak, etc)
Meter correct amount of water.
Heat water to ideal temp.
Dispense heated water over bed of grounds with a controlled flow rate.
Discard used grounds, insert new filter media. (ready for next cycle)
Maintain final product at a set temperatrue.
If now activity for a length of time, shut down system.
Just a thought.
Ken