First Shot

Coffee

 It works!  Super janky right now but all the pieces work:

Comments from Blogger

Anonymous — February 24, 2021 at 12:39 AM
Closed loop pressure control with the gear pump?
Ben Katz — February 24, 2021 at 12:45 AM
Yep. Detailed blog post on the way
Mick — March 06, 2021 at 11:38 AM
Very cool stuff! Does this system allow temperature control?
Ben Katz — March 06, 2021 at 04:22 PM
Yes, see: /posts/2021-02-26-closed-loop-espresso-intro/"blogger-comment">
Erik Cornelsen — March 08, 2021 at 01:42 PM
Very nice, well done! Which algorithm did you use for the PIDs control loops?