chrisdalke

14 ms·

91.
by chrisdalke 6y ago
This is exciting, the best part in my opinion would be the downsampling function: > SELECT lttb_downsample(time, value, num_buckets=>500) FROM data; I cannot tell you how many times I've reimplemented downsampling for time-series
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by chrisdalke 6y ago
Cool! You should record a demo video and post it here so we can see it in action.
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by chrisdalke 6y ago
By the way I'd love to chat about what kind of data collection you're doing on Cygnus-X1. I've been building a platform for data collection, visualization, and sharing from experimental hardware ( https://www.teleme
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by chrisdalke 6y ago
Nice little program! Pretty fun playing around with the PID gains and other settings. Saw you have an option to add torque noise. I tried adding some accelerometer noise (Just added some randomness to the input angle to doPID) and got some
95.
by chrisdalke 6y ago
This is really exciting, congrats on the launch! Exciting to see engineers coming from college engineering teams like FSAE -- I was a member of a solar boat racing team, which is a very similar problem space and also relies on "stackin
96.
by chrisdalke 6y ago
Hi HN! I often listen to an artist's entire discography in order when coding. Spotify displays singles and albums separately, and often jumps to an artist's radio instead of playing through in order. I got annoyed, and built a tin
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Show HN: Timelineify – Create Spotify playlists of an artist's full discography(timelineify.com)
7 points by chrisdalke 6y ago|1 comments
98.
by chrisdalke 6y ago
Good point -- The way I described it really applies to _any_ object floating in water. I don't have much experience with ship design, but on small boat design you can rely mostly on the geometry of the boat to produce a sufficient rig
99.
by chrisdalke 6y ago
For many shapes, there are multiple points of stability! If you drew a cross, you'd find that it could stabilize on any two corners. Stability of a floating object is determined by a "righting arm": A torque produced by the h
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by chrisdalke 6y ago
Curious what you ended up deciding on? Building something in-house? Another proprietary tool?
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by chrisdalke 6y ago
Realized I didn't actually have it in the profile and there's some sort of filtering on emails or the profile isn't updating. My email is my profile username @ gmail!
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by chrisdalke 6y ago
Sounds exciting! related, I've been building a open-source platform for hardware telemetry data called TelemetryJet ( https://www.telemetryjet.com/ ). It provides a toolkit for data collection, analysis, and visualizatio
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by chrisdalke 6y ago
Nice work! How are you persisting the data? Are you just keeping the history that the website shows, or keeping all historical data?
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by chrisdalke 6y ago
You're best equipped to solve problems that you experience yourself, but these problems don't have to be your own. Maybe you have friends or family in a different industry -- Seek out points of friction they might have. Maybe cons
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by chrisdalke 6y ago
This is a new 7-part documentary series by Veritasium and Seeker following the World Solar Challenge as they race across the Australian outback. Some really world-class college engineering teams building and racing experimental solar/e
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Engineering the World’s Fastest Solar Race Cars(youtube.com)
1 points by chrisdalke 6y ago|1 comments
107.
by chrisdalke 6y ago
But that's not why the FAA is regulating it, and these regulations won't stop that. They're regulating because people are flying recklessly above 400ft, above roadways, and in restricted airspace.
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by chrisdalke 6y ago
The need for regulation and education around proper usage of consumer drones is definitely clear, as shown by your (and many other people's) experience! Most enthusiasts would agree that a solution is needed. Most drone incidents have
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by chrisdalke 6y ago
No matter what, there will be consequences for DIY/hobby aircraft, just because cost/weight/complexity are critical factors in a small drone. Most of the planes I fly now are wood/cardboard with a few dumb electrical com
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by chrisdalke 6y ago
The final rule looks to be a big win for everyone who was protesting the original proposed rule: "The final Remote ID rule eliminates the requirement that drones be connected to the internet to transmit location data; the final rule re
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by chrisdalke 6y ago
Definitely agree with the sentiment of plain HTML+CSS being best for static blogs, but I've found value in using a static site generator for any "production" HTML site where the small overhead of a tool is justified because i
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by chrisdalke 6y ago
I completely agree -- I've been bitten a few times using React wrappers that turn out to have subtle flaws or are unmaintained. Generally I just write my own wrapper with some clunky combination of hooks to manage the lifecycle of data
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by chrisdalke 6y ago
One other common use for useRef that isn't mentioned here is to bridge your React component with a JS library outside the React ecosystem. For example, if you wanted to instantiate a charting library like uPlot ( https://gith
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by chrisdalke 6y ago
I use your site all the time to measure running routes - Thanks for the great work!
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by chrisdalke 6y ago
Recommended the exact same thing -- I'm glad I'm not the only one who immediately thought of his channel.
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by chrisdalke 6y ago
If you're a visual learner, check out Ben Eater's channel: https://www.youtube.com/user/eaterbc He has a really great video series where he builds a small computer from scratch on breadboards. Also some other
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by chrisdalke 6y ago
If I remember correctly you can have Netlify CMS commit changes to a branch that is auto-deployed, so you can see the fully rendered preview.
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by chrisdalke 6y ago
Yeah, ITAR restricts export of guided rocketry systems, which this qualifies as. He’s mentioned ITAR in some of his videos as one of the reasons he doesn’t distribute his firmware or schematics.
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by chrisdalke 6y ago
JavaProp is a very powerful tool for generating propellers and numerically calculating performance characteristics. You can get some great results if you’re willing to push through the arcane UI. http://mh-aerotools.de/airfo
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by chrisdalke 6y ago
The cult of McMaster is real -- My university's mechanical engineering department mailroom was always filled with McMaster packages. Insanely fast (Sometimes same day) turnaround, and you knew when you bought something they had selecte

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