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$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor

https://github.com/novatic14/MANPADS-System-Launcher-and-Rocket
123•ZacnyLos•2h ago•55 comments

A Visual Introduction to Machine Learning

https://r2d3.us/visual-intro-to-machine-learning-part-1/
80•vismit2000•1h ago•4 comments

Generating All 32-Bit Primes (Part I)

https://hnlyman.github.io/pages/prime32_I.html
17•hnlyman•1h ago•3 comments

Show HN: Signet – Autonomous wildfire tracking from satellite and weather data

https://signet.watch
6•mapldx•44m ago•0 comments

Rack-mount hydroponics

https://sa.lj.am/rack-mount-hydroponics/
207•cdrnsf•8h ago•48 comments

The Appalling Stupidity of Spotify's AI DJ

https://www.charlespetzold.com/blog/2026/02/The-Appalling-Stupidity-of-Spotifys-AI-DJ.html
192•ingve•4h ago•163 comments

Why Mathematica does not simplify sinh(arccosh(x))

https://www.johndcook.com/blog/2026/03/10/sinh-arccosh/
90•ibobev•3d ago•21 comments

Examples for the tcpdump and dig man pages

https://jvns.ca/blog/2026/03/10/examples-for-the-tcpdump-and-dig-man-pages/
22•ibobev•4d ago•3 comments

A most elegant TCP hole punching algorithm

https://robertsdotpm.github.io/cryptography/tcp_hole_punching.html
116•Uptrenda•9h ago•44 comments

How kernel anti-cheats work

https://s4dbrd.github.io/posts/how-kernel-anti-cheats-work/
227•davikr•12h ago•196 comments

Treasure hunter freed from jail after refusing to turn over shipwreck gold

https://www.bbc.com/news/articles/cg4g7kn99q3o
116•tartoran•9h ago•148 comments

Allow me to get to know you, mistakes and all

https://sebi.io/posts/2026-03-14-allow-me-to-get-to-know-you-mistakes-and-all/
187•sebi_io•14h ago•80 comments

Show HN: Han – A Korean programming language written in Rust

https://github.com/xodn348/han
184•xodn348•15h ago•101 comments

IBM, sonic delay lines, and the history of the 80×24 display

https://www.righto.com/2019/11/ibm-sonic-delay-lines-and-history-of.html
5•rbanffy•1h ago•0 comments

SBCL Fibers – Lightweight Cooperative Threads

https://atgreen.github.io/repl-yell/posts/sbcl-fibers/
115•anonzzzies•13h ago•20 comments

Centuries of selective breeding turned wild cabbage into different vegetables

https://www.worksinprogress.news/p/many-of-the-tastiest-vegetables-are
69•bensouthwood•3d ago•24 comments

Ageless Linux – Software for humans of indeterminate age

https://agelesslinux.org/
685•nateb2022•14h ago•452 comments

Bumblebee queens breathe underwater to survive drowning

https://www.smithsonianmag.com/science-nature/bumblebee-queens-breathe-underwater-to-survive-drow...
150•1659447091•15h ago•29 comments

Mathematics Distillation Challenge – Equational Theories

https://terrytao.wordpress.com/2026/03/13/mathematics-distillation-challenge-equational-theories/
80•picafrost•1d ago•3 comments

MCP is dead; long live MCP

https://chrlschn.dev/blog/2026/03/mcp-is-dead-long-live-mcp/
175•CharlieDigital•17h ago•153 comments

Tree Search Distillation for Language Models Using PPO

https://ayushtambde.com/blog/tree-search-distillation-for-language-models-using-ppo/
67•at2005•11h ago•5 comments

Slicing Bezier Surfaces

https://fatih-erikli-potato.github.io/blog/slicing-bezier-surfaces.html
14•fatih-erikli-cg•2d ago•4 comments

A look inside Dialector, filmmaker Chris Marker's chatbot from 1988

https://kubicki.org/letters/the-festival-of-the-machines/
52•kosmavision•3d ago•4 comments

An ode to bzip

https://purplesyringa.moe/blog/an-ode-to-bzip/
150•signa11•20h ago•81 comments

Discovering Little Worlds (2020)

https://dmitrybrant.com/2020/08/01/discovering-little-worlds
7•wonger_•4d ago•0 comments

The mechanics of autonomous software translation

https://alperenkeles.com/posts/autonomous-translations/
23•alpaylan•4d ago•1 comments

A Recursive Algorithm to Render Signed Distance Fields

https://pointersgonewild.com/2026-03-06-a-recursive-algorithm-to-render-signed-distance-fields/
105•surprisetalk•3d ago•7 comments

Marketing for Founders

https://github.com/EdoStra/Marketing-for-Founders
196•jimsojim•17h ago•88 comments

Baochip-1x: What it is, why I'm doing it now and how it came about

https://www.crowdsupply.com/baochip/dabao/updates/what-it-is-why-im-doing-it-now-and-how-it-came-...
326•timhh•3d ago•71 comments

Fedora 44 on the Raspberry Pi 5

https://nullr0ute.com/2026/03/fedora-44-on-the-raspberry-pi-5/
106•jandeboevrie•16h ago•33 comments
Open in hackernews

$96 3D-printed rocket that recalculates its mid-air trajectory using a $5 sensor

https://github.com/novatic14/MANPADS-System-Launcher-and-Rocket
119•ZacnyLos•2h ago

Comments

lukan•1h ago
So this is basically a DIY mini rocket clearly advertised to be used in an asymetrical war. I do not expect this project to remain on github for long.
throwaway290•1h ago
Insanity. Airbus fighter jets, open-source rockets on github...
RobotToaster•1h ago
Can't wait for the open source fighter jet.
abhikul0•45m ago
Clawjet, secured with sandboxing, bring your own SKILLs.
mschuster91•1h ago
Just a few days ago, we got a legitimate from scratch open source design for a phased array radar [1].

[1] https://hackaday.com/2026/03/12/open-source-radar-has-up-to-...

dalelux9196•20m ago
that's lit
nutjob2•1h ago
Airbus has been in the defense industry for a long time.

And the deadliest weapons in war today are repurposed toys.

mikkupikku•1h ago
Straight up admitting that it's meant to implement MANPADS is certainly a choice, I hope the author doesn't get himself in hot water.. ITAR or something..

(Would be cool to see an ATGM variant too!)

codethief•1h ago
As the YouTube comments say:

> This guy really wants that defense contract.

Mizza•1h ago
This is bonkers. Video on GitHub: https://www.youtube.com/watch?v=DDO2EvXyncE

I'm impressed by the kid's engineering and gumption, but I think he's a bit.. misguided, if you'll pardon the pun. The video ends with shots of Russian drone war, and, bizarrely, photos of David Koresh.

I don't think this ends well.

mikkupikku•1h ago
> The video ends with shots of Russian drone war, and, bizarrely, photos of David Koresh.

You're omitting that the end of the video also features pictures of Martin Luther King, Vietnamese civilians during America's invasion of their country and Afghani Mujahideen freedom fighters during the Soviet Union's invasion of theirs; I think he's trying to make a point about technology enhancing the capabilities of people who are in any conflict with conventionally powerful forces, not an endorsement of David Koresh.

radialstub•21m ago
> I think he's trying to make a point about technology enhancing the capabilities of people who are in any conflict with conventionally powerful forces

Which is absurd, since all the technology he used was manufactured by the conventionally powerful forces and they can decide to not sell you their stuff.

roysting•19m ago
It’s really odd how people will so easily fixate on the bone the government consisting of maniacal, narcissistic, psychopathic, pathological liars will throw them; while totally ignoring that the pathological lying, evil, murderous people in and of the government are constantly and ceaselessly, lying and murdering.

There now carpet bombing and murdering people in Iran, just like they mass murdered people in Gaza, and they’re doing it to cover up and distract from the fact that our government consists of raping pedophiles. That is who we are governed by. … but David Koresh excuses it and makes any opposition invalid, of close.

einpoklum•8m ago
I am completely against the US-Israeli war on Iran. That said, they are not carpet-bombing Iran. That is, they appear to be selecting individual targets rather than engaging in carpet bombing entire areas:

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

The choice of targets is not legally legitimate (and the entire campaign is illegal AFAICT), and sometimes they used old/invalid intel, like what happened with that girls' school that's supposedly close to an IRGC base. Still, it is mostly individual buildings or installations rather than an attempt to flatten entire areas.

huijzer•6m ago
I was reading your comment and thought you were a bit too extreme, but then I thought about it and was like "Hmmm. Yes. Sounds pretty accurate actually." So yes I agree.
JKCalhoun•53m ago
Who knew there were war bros.
tclancy•30m ago
We might need them. Would be better than my theory that this country will recover at some point after they destroy the EPA and reintroduce leaded gas because that's what made this country great which leads to a generation of kids who are willing to throw bricks at cops again.
roysting•42m ago
I encourage you to inform yourself about the truth about Waco. I cannot see how you could think pointing out the image is David Koresh while ignoring the images of what was done would indicate that you know the truth about that pivotal yet still obscured and hidden moment in American history.

Scott Horton and others have been doing a great job of uncovering the truth of what happened during that event.[1] There is no excuse for not knowing, especially since I’m handling it to you on a platter.

Spoiler Alert: the psychopathic narcissist in our government were evil and lying then, just like they were before Waco and ever since Waco. Imagine that; psychotic narcissists don’t just stop or were totally telling the truth that one time, even though they lie all other times about everything. The only thing you can believe about liars is that they are liars and will never stop lying; regardless of how many times you fell for their lies again.

[1] https://scotthorton.org/search/waco

myko•25m ago
The white washing of Koresh is sickening to see. Similar to how some in the US idolize the traitor Colonel Robert E Lee.
roysting•5m ago
Try to pay attention please. Koresh was not a great guy, kind of a piece of shit, but that does not mean you need to take the low IQ government bait to excuse their lying and wanton murder and constant evil.
Hnrobert42•17m ago
It is exciting to know a secret no one else does. David vs Goliath stories have always been powerful. It is seductive to think you have outsmarted the rest of society.

Be careful who you let manipulate those emotions.

roysting•7m ago
I am sorry to hear you suffer from mental deficiencies, but they are not secrets at all, you too can learn about the truth by following the link and informing ourself how the lying psychopaths in the government lied to you and made you the awful person that runs cover for evil like you are doing here.
laborcontract•14m ago
soo... i have no kept up with what's gone on in russia/ukraine. Are those drone videos what i think they are – drones sneaking up on humans and, presumably, ceasing them of life?

edit: Ok, I googled the guy

> I have read the works of authors such as Jean Baudrillard, Desmod Morris, and Ted Kaczynski who believe that technology is harming us and the world. https://wiki.opensourceecology.org/wiki/User:Alisherkhojayev

I feel the same as parent, I feel like this isn't going to end well for him.

mikkupikku•12m ago
Yes. Both sides are using explosive FOV drones, flown directly into soldiers (as well as other forms of drone warfare.)
laborcontract•7m ago
thank you. that was unnerving to watch.
randomNumber7•1h ago
> This project manifesto declares a fundamental shift: advanced air-defense capabilities—once locked behind billion-dollar state arsenals and classified labs—are now within reach of determined individuals using consumer electronics, open-source software, and rapid prototyping.

I guess a lot of people will not be happy with this xD

Xmd5a•53m ago
> Description: Space echoes like an immense tomb, yet the stars still burn. Why does the sun take so long to die?
pjc50•46m ago
Translation: everyone should be able to shoot down an airliner, not just nations.
MagicMoonlight•1h ago
Be very careful. Google and GitHub will turn you over without hesitation, and everyone who downloads this will probably be vanned.

Remember kids, the warrantless search is only illegal if they don’t find a surface to air missile. Anything can be made retroactively legal if they find something like this.

redgridtactical•1h ago
The engineering is genuinely impressive for $96, but naming the repo "MANPADS-System-Launcher-and-Rocket" on GitHub is going to attract exactly the kind of attention you don't want. ITAR implications aside, the interesting part is the mid-flight trajectory recalculation on a $5 sensor. That's the same basic problem military guidance systems solve with hardware that costs thousands.

The gap between consumer electronics and mil-spec capability keeps shrinking and this is a pretty stark demonstration of where that trend leads. A few years ago this would have required an IMU that cost more than this entire build. The democratization angle cuts both ways though - the same accessibility that makes this cool for hobbyists makes it genuinely concerning from a proliferation standpoint.

mikkupikku•42m ago
It's not really terribly new actually, in the past, rapid advances in consumer technology have enabled other sort of weapon guidance systems. For instance, the development of extremely compact television cameras available to consumers directly lead to the development of the Walleye television bomb. It happened when one nerdy guy was fucking around with his new camera and realized that he could automatically track track features in an analogue television signal using some quite basic analogue electronics. Point the camera into the general direction of the target and you can then "lock on" to some target feature and based on contrast it could tell how that feature was moving around in the image.

He implemented a 1D tracker in his garage, took it to work and showed people. A few years later these bombs are taking out bridges and even sometimes hitting moving trucks.

tclancy•21m ago
> The gap between consumer electronics and mil-spec capability keeps shrinking

My friend's brother works in munitions and had, in his spare time, designed and prototyped a missile that could be built for about 10k. He pretty much was ignored by the contractor he works for.

Shockingly, as of a couple weeks ago, they are all hot and bothered to talk.

redgridtactical•14m ago
I wonder what could have possibly sparked that... lol
hrmtst93837•12m ago
Cheap sensors look impressive in demos but drift and calibration wreck repeatability unless you babysit launches so nobody in defense is sweating this yet.
gmerc•4m ago
But do they drift enough to hit girls schools?
tzury•52m ago
Given the navigation is done by the cameras (not GPS) you will also need to do some work with the second repository (by the same guy)-

https://github.com/novatic14/Distributed-Camera-Node-Trackin...

chewbacha•45m ago
Sounds a lot more like a missile than a rocket.
mikkupikku•39m ago
The HN headline is very euphemistic, but his own published materials aren't. He's openly saying it's a missile.
alansaber•41m ago
Kid knows how to advertise
roysting•39m ago
I hope the kid is aware that he better not commit anything even remotely like a crime, because they will try to stitch him up quick.
jofzar•39m ago
God, I feel like I am going to be on a list after clicking that link.

The future is scary

niemandhier•38m ago
A certain kind of mind deals with stress by devising solutions, even if one cannot put them into action.

Seeing people in Israel, Iran, the general Middle East as well as the Ukraine live in fear of drone strikes might have incentivised this person to come up with a potential way to deal with these threats.

Cheap air defense would equilibrate drone warfare again:

Currently drones are much cheaper that the systems that take them down.

mikkupikku•36m ago
MANPADS can be effective against large drones, but definitely not against the kind of FOV shit we see in Ukraine. They were originally designed to kill helicopters and low flying aircraft, and I'm guessing that's still his design intent.
sschueller•31m ago
I would invert that statement.

The fact that home made drones can cause such havoc to even the best funded military is an equalizer when the military with all the power is actively trying to completely eliminate the otherside.

There are no home made devices a Gazan can build that can protect from a 2000lbs bomb.

getcrunk•34m ago
I watched a YouTube video the other day about how the usa tracks missle launches globally. I would assume they have to pass a minimum threshold of power/heat/energy to be detectable.

Let’s all pray this toy project, if readily upgradable, is also trackable and well … the way we keep law and order is by actual policing and prosecuting. So hopefully this doesn’t get out of hand.

Very impressive, but very troubling.

stavros•31m ago
Isn't it obvious that, if one person can do it, many more can do it as well, and probably have? It's not like they'll put it on GitHub.
lm28469•29m ago
This thing doesn't do anything a launcher from the 70s couldn't do.

Global detection is for balistic missiles, not things launched by human portable devices

mirekrusin•31m ago
John Connor.
neatze•30m ago
Many mention ITAR or some other issue, nothing about this project is even close to ITAR (as far I understand), connecting camera to rocket using it as guidance will get in trouble most likely, if not mistake only thing allowed is using camera to AIM at sun.

https://www.youtube.com/@LafayetteSystems is similar project, also by actual defense contractor, and less opensource.

isoprophlex•25m ago
This is obviously a missile, and I'm not well-versed in weapons tech, but won't this need a camera to actually track and take out a flying object? So far I just see gps and barometric sensing...

Also 3D printing and some electronics, ok fine, but where do you get the rocket propellant? That seems at least as critical as the software and sensing side of things...

alexnewman•17m ago
So you are going to see the following cope

Coper: But it's sensors are so low end it will never be reliable enough. Response: We can use AI to make up for low quality sensors, we can add a camera if we want it to be as reliable as self driving cars for a small amount of money Coper: AI what a joke that doesn't work Response: It's live in production Coper: But you can't fit a big enough payload Response: Lets see

holografix•14m ago
Fascinating, is miniaturisation and “democratisation” of offensive capabilities via 3d printing and consumer tech going to impact defensive capabilities as well?

Are we going to see foot troops carry one of these strapped to their backpacks and launched autonomously to counteract incoming drones?

tamimio•6m ago
Glad he’s in the US, I remember reading in Canada few months ago students got criminally charged for building and testing an anti-drone system.