By way of our resident coffee gadget guru John Edgar Park comes word of this… er… homebrewed temp-regulated, lever espresso machine, called the Robo-Pavoni.
Robo-Pavoni ; learning to make an espresso machine from scratch
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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.
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Is there a safety valve in that anywhere? The article didn’t mention one. If it’s running at 9 bar (~130+ psi), it’d be a good idea!