I have an espresso machine that partially implements this. EDIT: Here's the partially-incomplete and largely out-of-date source: http://github.com/burke/coffee

I have an espresso machine that partially implements this. EDIT: Here's the partially-incomplete and largely out-of-date source: http://github.com/burke/coffeeclock/tree/master http://github.com/burke/coffeeclock/tree/master