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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
624•klaussilveira•12h ago•182 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
926•xnx•18h ago•548 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
32•helloplanets•4d ago•24 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
109•matheusalmeida•1d ago•27 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
9•kaonwarb•3d ago•7 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
40•videotopia•4d ago•1 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
219•isitcontent•13h ago•25 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
210•dmpetrov•13h ago•103 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
322•vecti•15h ago•143 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
369•ostacke•18h ago•94 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
358•aktau•19h ago•181 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
477•todsacerdoti•20h ago•232 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
272•eljojo•15h ago•160 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
402•lstoll•19h ago•271 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
85•quibono•4d ago•20 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
14•jesperordrup•2h ago•6 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
25•romes•4d ago•3 comments

Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
3•theblazehen•2d ago•0 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
56•kmm•5d ago•3 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
12•bikenaga•3d ago•2 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
244•i5heu•15h ago•188 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
52•gfortaine•10h ago•21 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
140•vmatsiiako•17h ago•62 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
280•surprisetalk•3d ago•37 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1058•cdrnsf•22h ago•433 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
132•SerCe•8h ago•117 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
70•phreda4•12h ago•14 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
28•gmays•7h ago•11 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
176•limoce•3d ago•96 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
63•rescrv•20h ago•22 comments
Open in hackernews

History and use of the Estes AstroCam 110

https://www.dembrudders.com/history-and-use-of-the-estes-astrocam-110.html
68•mmmlinux•3mo ago

Comments

bediger4000•3mo ago
I built and flew both Camroc and Astrocam. Did not get any pictures with Camroc. I got a lot of pictures with Astrocam, a good many of them blue sky.

I never got the full 110 cartridge full of pictures. As the article implies, any model rocket flight had a decent probability of either catastrophic failure, or being impossible to retrieve. Get 6 or 7 flights on a cartridge, the temptation to develop it was too much.

vertnerd•2mo ago
My Camroc produced exactly one usable photograph. It was hell to load it with a single disk of unexposed film.
bediger4000•2mo ago
You have my admiration! I remember it being completely fiddly, both loading the film, and cocking the shutter, then keeping it cocked.
buildbuildbuild•2mo ago
I loved my AstroCam as a kid. I think dad and I tried six launches. When a photo finally came out it was the best day. Thank you for sharing, a great reminder of how far we’ve come. Also of how short attention span has eroded patience during many of today’s prescribed “STEM” activities.
EvanAnderson•2mo ago
My father had a 1970s Estes catalog that I adored as a kid. It had the ultimate camera rocket that I wanted to fly: The Cineroc (https://airandspace.si.edu/collection-objects/rocket-flying-...)

In the late 90s I finally saw some model rocket-based videos, made flying camcorders or TV transmitters on high power model rockets.

Today drones have made DIY aerial photography much less difficult, but I definitely wanted to fly cameras in my youth.

latchkey•2mo ago
I forgot all about this! Had one of these. Grew up in San Diego near the beach.

First time launching it up, it caught a big breeze, drifted west, never to be seen again.

tlavoie•2mo ago
I've still got mine somewhere, did get some pics with it. I was paranoid about losing it though, so I went with a couple big streamers instead of a parachute to get it closer to the launch site.
ck2•2mo ago
ha I vaguely remember that from the catalogs

But what I REALLY remember is learning that H class motors existed and became obsessed with finding one but the internet wasn't a thing yet so it was impossible

(several times more powerful than E class)

fun list:

https://en.wikipedia.org/wiki/Model_rocket_motor_classificat...

tlavoie•2mo ago
Yeah, the letters go up by powers of two. So an H would be eight Es, sixteen Ds. Considering the cost of a three pack of the latter, I could only dream of those brutes.
crgwbr•2mo ago
Same here. Even the small motors were expensive at the time. One winter my dad and I figured out how to make our own—rolled the casing out of packing tape, poured the end plug from (I think) Durham‘s rock-hard water putty, then filled with fuel made from a mixture of black powder, sugar, and salt peter. The next summer, getting to use up all the engines we’d stockpiled, was glorious.
tlavoie•2mo ago
I had (maybe still have somewhere?) a book I'd ordered online as a youth, on how to do exactly that. They were somewhat fiddly, in the sense of being slightly lower-impulse, with clay nozzles and a hollow fuel grain. Never quite got around to making any. I should look for that book though. In any case, it's likely harder than it used to be to get saltpeter, which they just carried in the pharmacy.
gopher_space•2mo ago
From what I recall you needed to assemble any engine larger than a D yourself.
watersb•2mo ago
The first personal computer generally available in the United States, the MITS Altair, grew out of projects like this.

MITS was an acronym: "Micro Instrumentation and Telemetry Systems". Ed Roberts and Forrest Mims made electronics kits for model rockets.

As a 1970s kid, I built Estes rockets, but I never did anything fancy. You'd spend a week or two of free time, building the kit and painting it. Then you'd blow it up on the launch pad, or launch it into the wild blue and never see it again. Or spend all your birthday money on a Star Wars X-Wing fighter, launch it, and have it nose-dive into the dirt about ten feet away.

Come to think of it, model rocketry was exactly like real rocketry.

Forrest Mims enriched my life in other ways, with his patient lab manuals for the Radio Shack electronics kits.

dreamcompiler•2mo ago
And of course Bill Gates and Paul Allen started their company to write BASIC for the MITS Altair.

https://en.wikipedia.org/wiki/Micro_Instrumentation_and_Tele...

technofiend•2mo ago
Completely shared experiences with regards to both Forrest's books and Estes' rockets, except after enough losses of the latter I got pretty fatalistic about new rockets. They were assembled and flown same day as soon as the glue dried, with maybe a slapdash decal; there wasn't much point investing too much time or energy when the wind or a tree was going to take them anyway.
joshvm•2mo ago
On film availability. It's relatively easy to slit film to width, with little jigs that are machined or 3D printed. This is popular for Minox "spy" cameras since new 8x11 reels are $20+ and you can refill an old plastic cartridge if you're very careful. The stock is about 8-9mm wide depending on the camera and so a 35mm roll will yield 2 strips that can be cut to length.

Some enterprising person makes a machined an aluminium Minox film cartridge, which is expensive, but solves the problem of the originals being incredibly fragile. It doesn't take many retail rolls to justify the cost though.

https://juliantanase.com/about-minox-film-cassettes-old-and-...

Here's a 110 slitter: insert https://www.camerhack.it/product/110-film-cutter/

m463•2mo ago
The astrocam was for rich kids and dads.

even camroc was like $5

Everybody knew big money was better spent on D engines.

gopher_space•2mo ago
And black powder chute replacements.