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gregsadetsky

10,524 karma · joined November 7, 2010

hi@greg.technology

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Cofounder of a web mapping startup acquired by Apple.

Received awards from the US Coast Guard and the Governor General of Canada for creating a map that helped rescue 1,700 people during Hurricane Harvey.

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Currently refurbishing laptops with robots! https://www.reviserobotics.com/ (YC W25)

Also working on Disco, an open source self-hosting software: https://disco.cloud/

See my talk about it at the Recurse Center: https://youtu.be/z2lP7C8VT6M

And this (slightly less chaotic) Devtools FM episode: https://www.youtube.com/watch?v=Xr3JJpbCRP0

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And even more stuff that's wildly out of date - https://greg.technology • https://tandy.link/s/greg.technology

submissionscomments
gregsadetsky··on Show HN: IKEA Complexity Index
the comments on ikea's site seem to agree with you - lots of extremely negative ones about the assembly

I did not do sentiment analysis on the comments (to modify my fudge factor mentioned elsewhere - which is the bulk of my complexity rating computation), but that could be a good next step..!

gregsadetsky··on Show HN: IKEA Complexity Index
Feel free to give me some real assembly time values - happy to adjust my very simple formula of steps x number of parts x fudge factor :)
gregsadetsky··on Show HN: IKEA Complexity Index
It’s rather a very simple math formula based on the number of steps and parts.

I adjusted the formula by researching online what people reported as the time it took them to build some of the items. ie there’s a linear regression “fudge” factor - but it’s still an extremely simplified “model”, if you can call it that.

gregsadetsky··on Show HN: IKEA Complexity Index
Sorry to hear! The products are from the US site, and I’m hiding products where the extraction pipeline couldn’t get all of the information (steps, parts count) reliably.

What are the missing products?

gregsadetsky··on Nxsys, Signalling and Interlocking Simulator
Also see:

- https://bernardgreenberg.com/Subway/

- https://github.com/BernardGreenberg/NXSYS

- and the incredible pages on the nycsubway.org site such as https://www.nycsubway.org/wiki/Subway_Signals:_A_Complete_Gu...

- and https://bernardgreenberg.com/Subway/bsg-subway.html

gregsadetsky··on LLM Networking with MikroTik
Have you tried poking at the unifi api?
gregsadetsky··on A Trip to 90s Kansai: Exploring the XD FirstClass Network BBS
What was your FirstClass server / where was it? Mine was used by a large-ish (2.5k people at peak) Macintosh User Group in Canada.

It was definitely formative - I still have friends from back then, and remember logging on daily.

As you say, the transition to the real Internet and web was painful/slow for them, and obviously being a commercial software made it especially hard. The software and the user group all disappeared around the same time - hard to say which came first.

gregsadetsky··on Turn your singing voice into printable notes (in the browser)
had the same error - it worked when I switched to desktop safari fyi
gregsadetsky··on 1k Words: A Writing Contest
Very fun!

I submitted this more 'nonfiction-y' entry:

https://gist.githubusercontent.com/gregsadetsky/08b6cdd56902...

It looks like it's only one entry per person, so I'm playing fair and not submitting this second entry, which encodes a compressed version of the image using a 128 word dictionary (ie each word encodes 7 bits).

The explanation + the dictionary + the encoded image result in 1000 words.

https://gist.github.com/gregsadetsky/97ac9c8efe9c2a9f08c9cfe...

gregsadetsky··on Why Switzerland has 25 gbit internet and America doesn't
Getting a Spectrum cable modem internet connection in NYC in 2026 is so deeply humiliating.

Dealing with the ridiculously limited upload speed, the outages, the locked router. The 40 minutes it takes on the phone to get it disconnected. Their constant attempts at upselling you cell phone plans and other terrible tech you’d never consider.

Truly, Fios is the most bare minimum. And there are much better options if you can pay commercial rates (stealth.net! Pilot!).

Truly embarrassing and sad.

gregsadetsky··on Wireless LAN SD
I remember - or maybe am mis-remembering - that years ago, SD cards used to exist with wifi access. I'm not sure whether you could read the card remotely? Or the card presented itself as a card, but actually streamed your data? But I remember that they existed?

But the thing that struck me even more is that - again, I may be wrong - those cards actually ran Linux? They were super tiny computers?

In a sense, I find it incredible because - is there a parallel world where we'd all be using SD cards as micro computers, and would just have small docks with usb/ethernet? These could have competed with Pis, could be deployed as micro servers..?

Anyway, if someone has real actual information, I'd love to learn more!

Actually - this article [0] seems to imply that this whole micro-world is sorta dead? But wifi SD cards are real and exist? Do they run Linux...??

[0] https://www.mbreviews.com/best-wifi-sd-card/

gregsadetsky··on Ask HN: Is it worthwhile to create a web browser in 2026?
I'd say yes - it seems like an interesting / worthwhile project, even if only for you to explore new areas/learn..?

Just curious, have you looked at https://browser.engineering/ - and generally speaking, what are your thoughts on the few new browsers appearing these days?

gregsadetsky··on Box3D, an open source 3D physics engine
To the larger point, do you know if Rovio did support/pay Eric in any other way than that hoodie?

Angry Birds generated $500M [0], supposedly.

I would also not be surprised if the Rovio developers, designers, testers, etc. who worked on this game did not get a share of that $500M pie - I actually assume they didn't.

But still, you know. Dare I say it - what about "fairness"? :-)

[0] https://gameworldobserver.com/2023/02/28/angry-birds-2-reven...

gregsadetsky··on Box3D, an open source 3D physics engine
Whenever I see Box2D mentioned (the library by the same author as Box3D, obviously), I think back to this story from many years ago

https://kotaku.com/this-guy-created-angry-birds-physics-and-...

gregsadetsky··on Hatari – Online Atari ST/STE/TT/Falcon Emulator
Could you talk about your setup? I'd love to learn more. Are you using Cubase or something else? Are input/output/backups complicated / do you commit to a floppy disk process?

Do you recommend finding a working Atari? Are they still reliable in your experience?

Thanks!

gregsadetsky··on Hengefinder
More information is also available here - https://victoriaritvo.com/blog/hengefinder/

A beautiful project by fellow Recurse Center alums Victoria Ritvo and John Pribyl!

gregsadetsky··on The Wisdom of Quinn the Eskimo (Apple Developer Technical Support Engineer)
Also see this interview with Quinn from 2000 in MacTech: http://preserve.mactech.com/articles/mactech/Vol.16/16.06/Ju...
gregsadetsky··on SoftBank Shareholders Update [pdf]
Conversation happening at https://news.ycombinator.com/item?id=48672506
gregsadetsky··on SoftBank Shareholders Update [pdf]
Do not miss out on page 46 and further.
gregsadetsky··on Develop magazine #19 (1994) [pdf]
For those curious, this issue includes (on page 20) an article from the creators of the Graphing Calculator, whose origin story [0] often appears on HN.

Also see this [1] for the full list of issues.

[0] https://www.pacifict.com/Story/

[1] https://vintageapple.org/develop/

gregsadetsky··on Map Clustering Is Not My Favorite
I am using 100% of all points from atlas obscura -- see [0] - the data is baked in the html and [1] my source which lists all 30k+ points

[0] https://www.atlasobscura.com/articles/all-places-in-the-atla...

[1] https://gregsadetsky.github.io/clustering-is-not-my-favorite...

gregsadetsky··on Map Clustering Is Not My Favorite
agreed re: hotels.com - what I see them doing well:

- don't cluster aggressively ie break out the clusters earlier (even if markers end up overlapping) - allow clusters and non-clusters to co-exist on the same zoom level (this is usually the case - except when maps are implemented to have "cluster only" levels and "point only" levels) - show immediately useful information in the point marker (the price!)

gregsadetsky··on Map Clustering Is Not My Favorite
It’s not easy for sure and I’m not a designer or ui/ux expert - just been around maps for a while

I agree with you that the point itself could show that it’s special - or - rely on users tapping/clicking it and then show all the info

In a sense, maybe conveying that the point has more than one data point attached to it isn’t critical - as long as you can see everything inside when clicking it!

Feel free to email me, would love to jam/chat about this!

gregsadetsky··on Map Clustering Is Not My Favorite
(op here)

I typically deal with dots at the same place as a single dot and, when clicked, open an infowindow/infopanel that will let people see all of the points’ data.

ie you do need to deal with this issue (by default, no mapping library will do it for you) - and most clustering librairies (or at least their default settings) will also not solve this for you.

The ui for what happens when a point (or even a cluster) is clicked but that point contains more than one point’s worth of data is its own separate problem basically

gregsadetsky··on APC–2 – A professional record cutter for producing original playback discs
yeah, I glued the jacket together - but no, I didn't get it printed professionally. that's a great thought!
gregsadetsky··on APC–2 – A professional record cutter for producing original playback discs
Unrelated, but related - if you want to have 1 record made, reach out to https://recordcut.com/

Their hours are "2:30 PM to 12 Midnight", I sort of believe... 7 days a week?

Rich will actually answer the phone, and guide you. I've done it a few times (it's an incredibly cool gift). A single record is $12. Extremely worth experiencing it.

gregsadetsky··on Ntsc-rs – open-source video emulation of analog TV and VHS artifacts
Rafał!!! U+1F62D U+1F62D U+1F62D!!!! haha

I'll email you. sorry everyone, just two pal's pall'ing around xx

gregsadetsky··on Ntsc-rs – open-source video emulation of analog TV and VHS artifacts
I actually posted ntsc-rs as it came up in my research - I'm also looking for something like what you're describing..!

I was also looking into https://codeberg.org/fsphil/hacktv which generates a variety of different analog tv signals (meant to be broadcast using HackRF) - but yes, I want the opposite - an analog-receiver-emulator...? And one that would be "ok" with incorrect signals // fail like an analog TV would... :-)

gregsadetsky··on Ask HN: What was your "oh shit" moment with GenAI?
proof of concept
gregsadetsky··on I tested every IP KVM in my Homelab
Extremely please build one! I'm serious. :-)
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