Reparaible and open source paper printer

https://www.opentools.studio/web/image/1446-c6a72ae3/DSC_6236.webp
Openprinter is a compact, fully repairable printer with refillable ink and versatile paper options. It's open source, adaptable, and eco-friendly with low costs and easy maintenance.

Organic Maps

https://organicmaps.app/sponsors/nlnet.svg
Organic Maps is a free, ad-free, offline GPS app for various activities, powered by OpenStreetMap data. It's developed by the open-source community with support from grants and donations.

Show HN: Homegames. An open-source game platform I've been making for 8 years

https://api.homegames.io/assets/15c42c63ac3059db66644668c53cac7e
Manage game assets right from the studio. Upload your own files or draw/record something in the studio. Publish games if you want to share them with the world. Or you can just keep them to yourself. Everything is GPLv3 from the platform code to the games to this website. You can read the code and fork it if you want to.

New AI tutor achieves 0.71-1.30 SD effect size in Dartmouth course [pdf]

Phosphor, a digital learning platform, increased final exam performance by 0.71-1.30 SD in Introductory Statistics at Dartmouth College. Full engagement with Phosphor showed a substantial cumulative benefit, with students who passed all three Module Reviews scoring 7.1 points higher on the final exam.

The future of Flipper Zero development

https://blog.flipper.net/content/images/size/w100/2020/10/9a8180b4-80fa-4c50-9e83-bee59e3bc348-1.png
The Flipper Zero team has decided to allocate resources to maintain the firmware and support community contributions. They will review community requests through GitHub Discussions, with voting for feature requests and stricter contribution rules.

Mr. Baby Paint and accidentally discovering a new cellular automata

https://tekstien-marginaalien-keskus.aalto.fi/residenssi/heikki/blog/004-december-2/mspaint.webp
The user created a drawing app called Mr. Baby Paint for toddlers to encourage creative play and designed it with a co-op approach for parents and toddlers to work together. The app features a simple interface, rewarding actions, and a flood fill based cellular automata that creates organic patterns when used in a specific way.

Starring the Computer

• commodore 64 • 23 (1998) • airwolf - season 2, episode 3, "moffett's ghost' (1984) • alien: romulus (2024) as the world turns – episode 19890928 (1989). ashes to ashens (2008) • altamont now (2009) • being erica (season 1, episode 1) • dr. robot — season 4, episode 3 '403 for

Zero-copy in Go: sendfile, splice, and the cost of io.Copy

https://segflow.github.io/content-assets/zero-copy-sendfile-splice/flamegraphs/wrapped.svg
A middleware change in a Go file-serving service caused a slowdown due to a single line of code that wrapped a *os.File in a logging reader, losing the fast path optimization. The fast path is preserved when using io.LimitReader, but wrapping with any other io.Reader loses the optimization and causes significant CPU overhead.

It's not about physical vs. digital games, it's about ownership

https://popcar.bearblog.dev/static/og-image.png
PlayStation's decision to stop producing disks for new games is about killing ownership and limiting consumer rights. This move will make it harder for people to trade, sell, and preserve games.

Connections in Math: the two kinds of random

https://stillthinking.net/_astro/two-files-histogram.DqGXH5PO_ZtbGfR.webp
Disclaimer: no AI was used to write this. Any errors, awkward sentences, and weird tangents are 100% organic, free-range, and human-made. Last post, right at the end, I dropped a puzzle and walked away from it. Here it is again, because this whole post is basically me refusing to let it go. Imagine two files, and each one holds a million digits. The first one is pure noise — imagine I rolled ...

Cursed circuits #5: capacitance multiplier

https://substackcdn.com/image/fetch/$s_!KgX0!,w_140,h_140,c_fill,f_auto,q_auto:good,fl_progressive:steep,g_auto/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fa9f1a08a-adcb-4f54-b52f-be66857c0cbe_600x429.jpeg
The article discusses an op-amp circuit called the capacitance multiplier, which can increase a capacitor's apparent value by using two resistors and an op-amp. This circuit can be useful for signal filtering or timekeeping applications.

Delta flight hit by firework while landing at Midway Airport on Fourth of July

https://media.nbcchicago.com/2019/09/DELTA-1.jpg?quality=85&strip=all&resize=320%2C180
Delta Flight 1076 made contact with a firework while landing at Chicago's Midway Airport on July 4. The plane landed safely without an emergency landing, despite the incident.

Dungeon Proof Crawler: learn how to write proofs with RPG

A browser roguelike where every monster is an Algae proof. Recover Miriam's ring before sunrise.

Pint in England

https://dispatch-media.com/content/images/size/w1200/2026/06/1.jpg
Burton upon Trent is a town in England known for its rich beer history and natural mineral-rich water. The town's breweries, both large and small, use this water to produce a wide variety of beers.

Composite Video on the NES: Why's it so wobbly?

https://nicole.express/assets/img/wobbly/b.png
The author discusses the NES's composite video signal, which has a wobbly picture due to its design. The NES's colorburst frequency is a half-integer multiple of its line rate, causing artifacts in the image.

Dependencies should be fetched directly from VCS

The author compares Ruby's dependency management to Go's, finding Go's system more secure due to its direct VCS fetching and lack of a "publish a package" step.

CoCom regulations and GPS receivers for balloons and cubesats

https://space.stackexchange.com/Content/Sites/space/Img/apple-touch-icon@2.png?v=bb39c00dba34
GPS receivers can be used at high altitudes and speeds without restrictions, but manufacturers must follow export control regulations. The current rule is that GPS receivers capable of providing navigation information at speeds greater than 600 m/s require a special license.

DNSGlobe – Rust TUI to watch DNS propagate around the world

https://raw.githubusercontent.com/514-labs/dnsglobe/main/demo/demo.gif
Dnsglobe is a Rust TUI that checks DNS propagation globally, querying 34 resolvers in parallel and showing results on a world map. It can be installed via Homebrew or crates.io and used to track DNS propagation for a domain.

You need a webring

A webring is a circular linked list of websites with a shared topic, allowing users to navigate between sites. It can be set up using a JSON file and routes like /prev and /next to auto navigate between sites.

Completing a Computer Science Degree on Coursera

https://notesbylex.com/_media/bachelors-after-hours/uni-assessment-results.png
The user completed a Bachelor's Degree in Computer Science on Coursera after 3 years and 9 months of part-time study while working full-time, and they found the experience challenging but rewarding despite some frustrations with the platform and grading process. The user appreciated the flexibility and affordability of the program, as well as the opportunity to learn from and connect with ...

Show HN: Osint tool that finds exposed files on domains

Search observed domains for exposed paths and misconfigurations. Substring search over the domain, case-insensitive, at least 3 characters. E.g. staging., .org, test-.

Introduction to Compilers and Language Design (2021)

This is a free online textbook on compiler construction by Prof. Douglas Thain, suitable for undergraduate students with C programming experience. The book offers a one semester introduction to building a simple compiler for a C-like language.

Artificial Adventures

I've been playing around with AI. Nothing I'm doing is particularly exciting, but the internet tends to only surface the most extreme opinions in either direction and I found it useful to hear from friends who have opinions that aren't optimized for click-through rate. I got $20/month subscriptions for anthropic and openai, and also put $20 of credits into each of google, ...

Run Windows 2000 on a DEC Alpha with a new es40 fork

https://raymii.org/s/inc/img/94c83ce76d8b4e73a02aff9e936b28d1.png
A new fork of the es40 alpha emulator, AXPBox, has been released with improved features. It allows running Windows 2000 on the DEC Alpha with massive speedups due to a JIT compiler.

Had an idea for a Rust editor with simple Vim mode for learning

https://raw.githubusercontent.com/electronicsleep/rust-vim/main/screenshot.jpg
simple rust text editor with vim keys. Contribute to electronicsleep/rust-vim development by creating an account on GitHub.

The great blogging collapse: What happened to 100 successful blogs?

https://danielstanica.com/cdn-cgi/image/format=auto,width=2400,quality=82,fit=scale-down/_emdash/api/media/file/01KVXPP883PH1RTP49CQ1P2E5F.png
A study of 100 blogs found that 2/3 lost 85% of their traffic after Google's Helpful Content Update and AI Overviews became prevalent. Only 21 blogs grew, sharing traits of experiential content, owned audience, and real product, while summarizable content failed to recover.

Johnson Thermoelectric Energy Converter

A Johnson thermoelectric energy converter or JTEC is a type of solid-state heat engine that uses the electrochemical oxidation and reduction of hydrogen in a two-cell, thermal cycle that approximates the Ericsson cycle.[1] It is under investigation as a viable alternative to conventional thermoelectric conversion. Lonnie Johnson invented it and claims the converter exhibits an energy ...

We Always Leave Things Unfinished

https://substackcdn.com/image/fetch/$s_!0VEQ!,w_5760,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc0f76d76-aff5-4f92-bb36-9adf1a8b2bad_3019x1700.jpeg
William Vollmann, a renowned author, shares his experiences and thoughts on writing, politics, and life, including his struggles with cancer and his views on Donald Trump. Vollmann discusses his new novel, A Table for Fortune, and his past works, including his septology Seven Dreams, while also reflecting on his personal life and relationships.

The full stack of terminals explained

https://avatars.githubusercontent.com/u/960133?v=4
The article covers the full stack of terminal knowledge, from vocabulary to implementation, explaining the relationships between Terminal, Shell, TTY, Console, and Line Discipline, and how they fit together. It also provides a step-by-step guide to building a TUI app, including terminal mode settings, input processing, screen control, terminal size management, and buffering, using Node.js as ...

Installing A/UX 1.1 like it's the 90s

https://thomasw.dev/assets/posts/aux11/1.png
The user successfully installed A/UX 1.1 on a Macintosh IIx emulator called Snow, overcoming several bugs and hardware emulation issues. A/UX 1.1 has a UNIX-y interface and allows running some graphical Toolbox applications, but lacks a full graphical interface like A/UX 3.x.