roevhat
Re:Losing 100 pounds in 276 days
on Monday June 25, 2018 @09:15AM (#17392114)
Related: https://news.ycombinator.com/item?id=13413725.
Here using closed-loop feedback for weight loss.
Re:PID Without a PhD (2016) [pdf]
on Tuesday January 30, 2018 @02:11AM (#16263449)
Yes, indeed!
What worked for me in the end, was to first understand state observers (e.g. Luenberger observers) and then consider a Kalman filter as an optimal observer, where the observer gain is the steady-state Kalman gain.
The whole duality between state-feedback design and observer design -- and LQR and Kalman filters. Then it made sense :-)
Re:Show HN: An attempt to measure fermentation activity from the sound...
on Friday July 14, 2017 @03:28AM (#14768176)
I put it near the airlock and detect peaks. For now, the most valuable information I extract is when the fermentation starts and stops -- with notifications on my phone :-)
Re:Show HN: An attempt to measure fermentation activity from the sound...
on Thursday July 13, 2017 @03:33PM (#14764427)
Awesome! I attempted the same approach, but after discovering a cheap gas concentration sensor (MQ-135, tunable to CO2) I abandoned the audio approach for a minimum of data processing. I get very accurate bubble detection and highly recommend it :-)
Re:What actually happens when you plug in a USB device? (2007)
on Thursday June 19, 2014 @07:15AM (#7915537)
So true :-)
Re:Ask HN: Do you own a 3d printer? What has been your experience?
on Monday April 28, 2014 @06:39AM (#7659119)
I built a Prusa i3, with most parts 3D-printed on another Prusa i3. I mainly use it for university projects, printing actuators and cases.
Last semester we printed a model boat, about half a meter long, outfitted it with a printed a linear actuator to control the rudder angle, and - as our semester project - built an autopilot for it. Great fun :-)
Re:First Atomic Clock Wristwatch
on Wednesday April 16, 2014 @07:04AM (#7597037)
Where do I order one? I'm hooked!
Re:Show HN: A less-than 100 SLOC PHP Framework
on Wednesday August 14, 2013 @02:07PM (#6213182)
You are welcome :-)
Re:Ubuntu 13.04 Raring Ringtail Released
on Thursday April 25, 2013 @05:07AM (#5606302)
Who will be upgrading from 12.04? :-)
Re:Flat UI DMCA Takedown
on Friday March 08, 2013 @02:19AM (#5342396)
Apparently...
Aaron Swartz: Teenager in a million
Re:Alias.sh: for finding, sharing and storing bash aliases
on Monday January 14, 2013 @02:53AM (#5053740)
I don't know if it is my browser, but to me I get the feeling the site is disabled, with the very darkend colors. It's almost as if a modal is showing, and the rest of the page is faded out - but I can't see no modal. Just my first impressions. But other than that: Really cool - going straight to the bookmarks!
Re:Ask HN: Which linux distribution are you using?
on Sunday December 30, 2012 @12:14PM (#4986332)
Ubuntu LTS.
Re:Show HN: First real C project. Where to go now?
on Sunday December 30, 2012 @08:40AM (#4985650)
Any type of comment!
Great feedback, I can use anything at the moment, since I really wan't to learn the language and the process of building something with it :)
And I had also recently started using HN, so I wanted to share it with others.