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

https://openciv3.org/
553•klaussilveira•10h ago•157 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
876•xnx•15h ago•532 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
79•matheusalmeida•1d ago•18 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
13•videotopia•3d ago•0 comments

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

https://github.com/valdanylchuk/breezydemo
191•isitcontent•10h ago•24 comments

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

https://github.com/pydantic/monty
190•dmpetrov•10h ago•84 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
7•helloplanets•4d ago•3 comments

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

https://vecti.com
303•vecti•12h ago•133 comments

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

https://github.com/microsoft/litebox
347•aktau•16h ago•169 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
347•ostacke•16h ago•90 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
75•quibono•4d ago•16 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
444•todsacerdoti•18h ago•226 comments

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

https://eljojo.github.io/rememory/
242•eljojo•13h ago•148 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
46•kmm•4d ago•3 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
17•romes•4d ago•2 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
379•lstoll•16h ago•258 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
225•i5heu•13h ago•171 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
103•SerCe•6h ago•84 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
162•limoce•3d ago•85 comments

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

https://infisical.com/blog/devops-to-solutions-engineering
131•vmatsiiako•15h ago•56 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
41•gfortaine•8h ago•11 comments

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

https://github.com/phreda4/r3
63•phreda4•9h ago•11 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...
20•gmays•5h ago•3 comments

Show HN: ARM64 Android Dev Kit

https://github.com/denuoweb/ARM64-ADK
14•denuoweb•1d ago•2 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
262•surprisetalk•3d ago•35 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/
1035•cdrnsf•19h ago•428 comments

Zlob.h 100% POSIX and glibc compatible globbing lib that is faste and better

https://github.com/dmtrKovalenko/zlob
6•neogoose•2h ago•3 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
56•rescrv•18h ago•19 comments

Show HN: Smooth CLI – Token-efficient browser for AI agents

https://docs.smooth.sh/cli/overview
85•antves•1d ago•63 comments

WebView performance significantly slower than PWA

https://issues.chromium.org/issues/40817676
20•denysonique•6h ago•3 comments
Open in hackernews

A 1980s toy robot arm inspired modern robotics

https://www.technologyreview.com/2025/04/17/1114456/toy-armatron-modern-robotics-ai-nostalgia/
126•danso•9mo ago

Comments

brudgers•9mo ago
https://archive.ph/wAqgu
chillingeffect•9mo ago
There was an article in i think Radio Electronics at the time to connect it to a C64.
jim_lawless•9mo ago
There was a pretty detailed article in the May 1985 Radio Electronics that mentioned interfacing it to a VIC-20:

https://archive.org/details/radio_electronics_1985-05/page/n...

Transactor Magazine volume 7, issue 4 (1987 ) had an article on interfacing it to a C64:

https://archive.org/details/transactor-magazines-v7-i04/mode...

Mountain_Skies•9mo ago
Hot Coco had an article about hooking it up to the TRS-80 Color Computer.

https://colorcomputerarchive.com/repo/Documents/Magazines/Ho...

>By moving the joystick (a mechanical linkage), you select one of a series of rotating cams that connect a gear to the power shaft. This is probably the worst design possible for modification to electronic control.

At the time I was disappointed that it didn't use (non-existing) motors already in the Armatron but looking back at it with an understanding of the mechanical design, it's easy to see why they went with that decision. The only other choice would have been to connect to the joysticks themselves. The added motors probably improved the operation quite a bit.

chillingeffect•9mo ago
Ahhh so it had only motor that got switched in and out mechanically, eh? That must be why it was always whirring even when not moving. I guess small motors were not cheap back then :)
petermcneeley•9mo ago
Is my computer hacked or is everyone else seeing a giant subscribe banner on this page?
EncomLab•9mo ago
I spent hours playing with mine in the mid 80's! The key takeaway - then and now - is that you can generate an incredible variety of motion with a single motor and a well designed gear-box; no software required!
eterpstra•9mo ago
I had this thing and loved it but it WAS SO G$DD$MN LOUD!!!!!

It was like the sound of a pile of silverware dumped into a garbage disposal played at full volume over an AM radio.

Great controls, though.

Mountain_Skies•9mo ago
It was made for Radio Shack by Tomy, who made lots of battery operated toys in that era that were very complex and clever amalgamations of plastic parts. My sister had Tomy's 'Dream Dancer', which was obnoxiously loud, though you don't see that in the advertisements. She never got a second set of batteries once the Christmas day set gave out.

https://www.youtube.com/watch?v=0K8ZP1pnP78

manyturtles•9mo ago
Yep. Sold in the UK as the Tomy ROBO-1. Had great fun playing with it, never knew people had hooked them up to computers. Echoing others' comments, the drive was noisy even when stationary. And it didn't seem to have any sensors to let it know when it had reached the limit of any particular motion. Instead the plastic gears would start to skip loudly with a usefully intuitive "if you keep doing that I'll break" sound.
jhbadger•9mo ago
They even made "fake" electronic games like Blip -- a version of Pong that was electromechanical rather than electronic. Presumably at the time that was a cheaper way to do things, but like mechanical watches it is in a way more impressive than using electronics.

https://en.wikipedia.org/wiki/Blip_(console)

Mountain_Skies•9mo ago
We had Blip and a baseball game that tried to look like an electronic game but we instantly knew it was inferior to the "real" thing. Looking back on it now, the mechanical games were more impressive, even if the electronic games were more expensive due to the various ICs.

Though Blip used batteries, it didn't go through them anywhere near the rate something like Head-to-Head football did. The baseball game was completely human powered, making them both far more useful in our rural area where batteries weren't available without a trip to town. Plus batteries were an added expense.

userbinator•9mo ago
A bit of lube may help quiet it down, but otherwise I think it's quite reminiscent of how a lot of heavy equipment at the time operated, with an engine that's idling whenever it isn't driving some part through a clutch.
gedy•9mo ago
I'm impressed Hiroyuki Watanabe was only 24 years old when he invented/led this.

> “I didn’t have a period where I studied engineering professionally. Instead, I enrolled in what Japan would call a technical high school that trains technical engineers, and I actually [entered] the electrical department there,” he told me.

I think this approach is sorely needed again, in the US at least.

petermcneeley•9mo ago
The grass was so green back then. Today leaves are brown and there is a patch of snow on the ground.
Swizec•9mo ago
I went to a technical high school for software engineering in Slovenia and it was fantastic. We learned C/C++, SQL, relational data modeling, basics of OOP, assembly for microcontrollers, IT administrator stuff, networking/internet, some basics of web development, a little about operating systems.

I did go to study CS after high school (despite getting a job midway through my senior year), but I still draw on the things I learned in high school every day. It was great. Gave me a lot of practical foundations.

hinkley•9mo ago
There was a math and science school in my state but it was a boarding school, and that did not seem like a good idea for me.
gopher_space•9mo ago
We have technical high schools for all kinds of subjects all over the place. Our community colleges are also doing everything HN thinks they should be doing, and they started like thirty years ago.
siavosh•9mo ago
Is there a modern version of this as a toy for a kid?
shove•9mo ago
I still have the muscle memory for these controls. I was completely gobsmacked when I disassembled it and saw the concentric rings of gears. Very very cool.
hinkley•9mo ago
How does this thing work?
smcameron•9mo ago
This video shows the innards of the thing: https://www.youtube.com/watch?v=aMdmkONa7qs
Gracana•9mo ago
That is way cooler than I expected.
hinkley•9mo ago
Gosh, no wonder it was so loud.
gene-h•9mo ago
A similar single motor robot hand has been made that uses electrostatic clutches instead of mechanical clutches[O].

[0]https://arxiv.org/abs/2501.08469

irickt•9mo ago
Tandy Armatron Dissection http://www.starborneworks.com/?p=22
6510•9mo ago
https://www.youtube.com/watch?v=aMdmkONa7qs
userbinator•9mo ago
Incidentally, planetary gears as clutches is also a feature in various Japanese VCR mechanisms.
djmips•9mo ago
When he mentions that a small piece of grit was fouling the gearbox and the pithy advice that small things can cause big problems reminded me of the toaster I fixed recently where I spent most of my time with the electrical aspects ruling out everything until I was left with the electromagnetic latch and after disassembly it turned out a very small toast crumb had found it's way inside and was in the way of a flush contact between the electromagnet and a steel plate. Just cleaning that out brought the toaster back to full function!
whartung•9mo ago
Friend had one of these. I think he got it from Radio Shack. This was right up their alley.
thedougd•9mo ago
Oh man, I completely forgot I had a robot arm as a kid. I had the "Mobile Armatron" variant:

https://www.theoldrobots.com/armatron3.html

victor106•9mo ago
Any recommendation on a robotic kit that can be purchased now?
ccwu9999•9mo ago
OWI has a lot of robot arms. I built the wired controller version of this. As a software engineer building this gave me a lot of appreciation for making physical things. Trying to create a computer controlled version is tricky since you need something to indicate the current position of the arm.

https://owirobot.com/robotic-arm-edge-wireless/

WillAdams•9mo ago
Would it be possible to replicate this mechanism using Lego Technic bricks/mechanisms?
kbouck•9mo ago
didn't read article due to paywall, but the answer is most likely yes. i was able to build a basic 2-degrees-of-freedom robot-arm grabber using lego technic and power functions and was controlled by scratch on a raspberry pi. lego also has pneumatics.
pvorb•9mo ago
There's an industrial robot arm built out of LEGO Technic bricks by OrangeApps, a small company related to German robot manufacturer KUKA. [1] It's primarily used for educational purposes.

Disclaimer: I work for a subsidiary of KUKA.

[1]: https://www.orangeapps.de/?lng=en&page=apps%2Fers3

djmips•9mo ago
It would be much larger and very expensive but if it could be done it would be challenging to replicate using the same one motor and gear train design but I'm sure some LEGO wizard out there could pull it off given that we've seen some amazing LEGO builds in the past like mechanical calculators.
A4ET8a8uTh0_v2•9mo ago
Somewhat related to this. What would recommend for a young kid 5 and up to get start in today's robotics. The issue today seems more like there is a lot.. which is kinda opposite to what when I was growing up ( if it existed in toy form, it was prohibitively expensive at best ).
dan_linder•9mo ago
No personal experience with them, but KiwiCo seems popular to introduce kids to electronics:

https://www.kiwico.com/

firesteelrain•9mo ago
Used to play with this. Always wanted one - my best friend had one
fmajid•9mo ago
My little brother had one, circa 1985. I don't think the educational content was all that great, compared to our Apple II+.
pryelluw•9mo ago
We had one of these and it definitely sparked my long running interest in robotics. Which expanded into small scale robotics manufacturing and then onto 3d printing. I’m now playing with LLMs to discover ways to incorporate into smaller robots. More excited these days about what is to come.
brk•9mo ago
I remember saving birthday money and buying this at Radio Shack as a kid. It was pretty advanced for the time. Then I had the idea to try and make it remote controlled, or just fiddle with the internal electronics a bit. Joke was on me, there were no electronics, this thing was 100% mechanical. A single DC motor, and a fuck ton of gears that were engaged/disengaged by manipulating the two joysticks.

This toy probably equally inspired kids to go into robotics, or to design automotive transmissions.

sublinear•9mo ago
Probably frowned upon here, but can I get a "fuck yeah!"?
itomato•9mo ago
This was the big lesson for me also. I finally got clearance to take it apart some years later to understand why it was so loud, so weak, so slow and what opportunities there were to connect it to the TI-99/4a.

It was a disappointing setup and I don't think I put it back together.

mbrumlow•9mo ago
I did the same thing. My mom was pissed I took it apart.

I was disappointed with how it worked as well. The motor was reused in a different project later, there was no hope in me putting this one back together.

chrisweekly•9mo ago
Oh man this takes me back. Armatron and Speak-N-Spell were so great!
stevenjgarner•9mo ago
I would put the HERO (Heathkit Educational RObot) in both the same category and the era. [1] HERO came with "an optional arm mechanism and speech synthesizer was produced for the kit form and included in the assembled form". Huge influence on my own life.

[1] https://en.wikipedia.org/wiki/HERO_(robot)

jgalt212•9mo ago
HERO was on an episode of Mr. Wizards' World. Man, did I want one.

https://www.youtube.com/watch?v=PJDwO1z9qM4

stevenjgarner•9mo ago
Thanks for sharing. It is inspiring to see a passion for keeping HERO alive today. Here's a 4-part video from 2019 diving into HERO restoration:

https://www.youtube.com/watch?v=I6eAQAZseuM

ChuckMcM•9mo ago
I ended up buying three of these as I was going to convert one to computer control. Last year at the ASVARO swap meet I sold the last one I had which had never been opened :-). The guy who bought it was pretty excited to have it (which is the goal of getting rid of one's junk right?)

They were marvels. The only "practical" way to convert them was to put solenoids on the controls to drive them and it was impractical for any repeatable fine grain control. If I ever get a chance to meet the person behind that design I'd certainly buy them a round of their favorite beverage.

userbinator•9mo ago
The fact that someone has converted one to run on steam is very appropriate given that the single-power-source design was the norm for industry until the 20th century, and it's not hard to imagine in a steampunk universe a much scaled-up, metal version of this arm in a factory, powered by a lineshaft:

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

perilunar•9mo ago
I think an ideal steam-punk version of this would have multiple pistons instead of complicated gears, one for each degree of freedom, powered by a central boiler and controlled by brass valves. i.e. pneumatic, but steam instead of air.
hedora•9mo ago
I’m surprised these aren’t still made!

I wonder how far you could get in 2025 with cnc routers/lasers and 3d printers.

IAmGraydon•9mo ago
Mine is still in my parents' attic.
teleforce•9mo ago
The modern version of this is LEGO SPIKE:

"In 2020, LEGO introduced the SPIKE Prime kit as the next-generation successor to LEGO MINDSTORMS EV3, boasting upgraded hardware, a more robust processor, and an improved programming environment designed for enhanced user-friendliness and intuitiveness. Following this, in 2021, LEGO launched SPIKE Prime Essential, specifically tailored for elementary-level students, incorporating age-appropriate components like mini-figures and mini-figure props within the kit. Nevertheless, its deliberate simplicity, while catering to younger learners, results in a lack of complexity." [1]

[1] LEGO SPIKE Essential or SPIKE Prime?

https://www.cmu.edu/roboticsacademy/spike-essential-or-prime...

freddealmeida•9mo ago
Hahaha. I had one and look at that I worked in robotics and AI. Never realized that before. Toys do have impact, don't they?
djmips•9mo ago
So I was curious about the Japanese domestic version and it was called Desk Top 144 - I've found a Japanese instruction paper with that name. It's also shown here amongst a dizzying array of SKUs including a mobile unit!

https://www.theoldrobots.com/images6/ar04.JPG

https://www.theoldrobots.com/armatron2.html

djmips•9mo ago
Seeing the Japanese manual the product was called ARMTRON. That makes sense to me. I think the Armatron is possibly a mistranslation of the romanization of Armtron.
bentt•9mo ago
We still have one of these and it still works! Amazing.
4d4m•9mo ago
Similarly driven by a single motor: furby