Why does it take so long to release black fan versions?

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Show HN: Browser-based light pollution simulator using real photometric data

Interactive light pollution analysis with photometric data

Ti-84 Evo

https://education.ti.com/-/media/ti/education/images/products/product-details/graphing/84-series/84-evo-shared/overview-evo-animated-screen-math-tools-v2.gif?rev=3e5c20f1-f86c-4050-9cb5-9230c63a8684&la=en&h=420&w=480&hash=C7678842D23A4F35210353A5A2B4B4AF
The input is a JSON object containing a list of commands for a text editor. The commands include editing text, formatting options, and inserting links and images.

SKILL.make: Makefile Styled Skill File

https://opengraph.githubassets.com/fad7a5919b3fa928fcdf3fd22543f814c4ea578557c31286290a21947482c94b/Teaonly/SKILL.make
SKILL.make brings the declarative, dependency-driven paradigm of Makefiles to the Agent Skills format. It replaces fuzzy prose with structured logic, turning SKILL.md into a reproducible execution graph. Token Efficient: Optimized syntax reduces SKILL file size by ~15%, saving costs and context window space. With manual optimization, context size can be reduced by more than 30%. Dependency ...

A Gopher Meets a Crab

https://miren.dev/gopher-crab-chat-ui.png
The author, a Go developer, tried Rust for the first time and built a chat server with the help of a Rust IDE. They found Rust's exhaustive enums and ? operator useful but struggled with implicit exits and dense syntax.

Artemis II Photo Timeline

https://artemistimeline.com/web/9608627.jpg
An interactive photo timeline of NASA's Artemis II mission — scrub through every crew moment, lunar flyby shot, and audio clip from April 1–10, 2026.

New research suggests people can communicate and practice skills while dreaming

https://media.newyorker.com/photos/69f38c2c92c2d134aec145ec/2:2/w_2560%2Cc_limit/image2%2520(4).jpeg
Scientists have been studying sleep learning, where people learn new information while asleep, and found promising results, but early studies were flawed. Recent research has shown that sleep can influence behavior and learning, with some people able to solve puzzles and remember information after waking.

Ask.com has closed

IAC is discontinuing its search business including Ask.com after 25 years. Ask.com officially closed on May 1, 2026, thanking users for their loyalty and trust.

The USB Situation

https://randsinrepose.com/wp-content/uploads/2026/04/usb-situation.jpg
I use a MacBook Pro with a Studio Display, connecting via a braided cable that handles video, power, and other Display connections. The cable's speed is limited by the port type, not the cable itself, so I recommend using a Thunderbolt 5 cable for faster speeds.

To Restore an Island Paradise, Add Fungi

https://yale-threesixty.transforms.svdcdn.com/production/Palmyra-Atoll_USFWS.jpg?w=400&auto=compress%2Cformat&fit=clip&dm=1777370036&s=bca8540c1ea43d9e372f4baeda9e754e
Conservationists on Palmyra Atoll are working to restore native wildlife by removing invasive palm trees and introducing native fungi. Researchers found rare mycorrhizal fungi that could help supply nutrients to Pisonia trees and boost seedling growth.

K3k: Kubernetes in Kubernetes

https://opengraph.githubassets.com/8cdc79e3605f7970225f72e2e61b4323cfa83c7d80371e43c543dbeb6328cbad/rancher/k3k
K3k is a tool that creates and manages isolated K3s clusters within a Kubernetes environment, offering efficient multi-tenancy and resource isolation. It provides both shared and virtual modes for optimized resource utilization and complete isolation.

LFM2-24B-A2B: Scaling Up the LFM2 Architecture

https://cdn.prod.website-files.com/67cb8aa6e9184b6e44813189/699c94edd6c639c7489d4b4d_MoE%20(1).png
LFM2-24B-A2B is a large language model with 24 billion parameters, released in an early checkpoint, and is deployable across cloud and edge environments. It shows consistent quality gains on standard benchmarks and has favorable throughput scaling, making it suitable for on-device deployment.

I'm Peter Roberts, immigration attorney who does work for YC and startups. AMA

The user discusses various US immigration topics including the new $100k H1B fee, N400 application delays, L1 visa changes, and green card application challenges. They also mention the difficulties of sponsoring H1-B workers for permanent status and the increasing RFE and denial rates for certain green card applications.

Bitmap and tilemap generation from a single example

https://raw.githubusercontent.com/mxgmn/WaveFunctionCollapse/master/images/wfc.png
(C1) The output should contain only those NxN patterns of pixels that are present in the input. (Weak C2) Distribution of NxN patterns in the input should be similar to the distribution of NxN patterns over a sufficiently large number of outputs. In other words, probability to meet a particular pattern in the output should be close to the density of such patterns in the input. WFC initializes ...

CollectWise (YC F24) Is Hiring

https://bookface-images.s3.us-west-2.amazonaws.com/logos/a5be02a3378f664e1f80f2a84997514d00f9fc1f.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAQC4NIECAKS2NGTZR%2F20260502%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20260502T044705Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEG0aCXVzLXdlc3QtMiJHMEUCIAMI3cfIMsm0%2Fte%2FMckDxTL%2Bofj9hrh2VOPH6TPR8EKbAiEA0I191aErypki%2FKjzEuTYC0XVeCd3sdc%2F%2BqH4o2UquCgq5QMINhAAGgwwMDYyMDE4MTEwNzIiDDI%2B4r1amFYx66m9mSrCA1nFHyQ6wL6hVlcbslYrOcOroUoPPyIjh75cEYKBFbSKiPIla1KxNGU6kjeHX8El0wKgMvDXbPeF8vRIbprYECxP4J7x6Olr78FU9GZ71dtN3jb44gP%2BMYSfaL7oabV3QIiynVNuq0lyDo07IQXq7cyPe7Vmp%2FRCqUdT%2Fab6vfhICBJlDD%2Fy%2FcNXzjC7l%2BjcNhJ%2BJKlkhtuZcLvqSUzajhO3JdOENWURUxfqBmpEcRSzDthMTSrT5ZsFyyLJeRbhiXEHjU3VlhFiq6sXi5WYh635UTSiFwPJQEpGDsfR8rEZ28m3AFvsZiAaR3Ex2mAu8%2FBTfDiPtk8GO9UDoIa7mDmy9vC9a2ZCraRhIG3lXhnedVnp%2BF6EFaSPHc1rKfiI7VXP4GUli8%2FPe5mJoE2qb6iQyJ8B1X6EIlSxynUrxJ5NplnnrhSAB%2B7eBkB3r8DPUAmtCmtphZ%2BxHAVnnQRpiN%2BreQ3RogsTMMaZJck1ygCjksMgu%2B6HaLMqN9FmJu%2BJW14WM03VZBy01m%2Fm3qJbEoROvYApqODKwpmsw7tUA2S6Vrkp819BD3y9XmAXZV1FakQZ6HIInQN%2FefIZzBDCGQP0RjDngNbPBjqlAXjJROpI8o%2FoLTNeo2KLJYFwonv91xUDTXb7enw3UFRUvR%2FvS7pVMlICVBF9V9jvYIx%2BP9LSnh%2FhgKV46oREpk3x4PhPaute7pSucZaSzBIDo0IadkvwAFrbJzO1walYQSm68AUDyIsIs3Fs9qFaJkLOY0%2FoEFtNuNGl8AUNpgSPb9%2FYXKxptIV1nY5qYuYgh%2FoFiONFf6pU5o4X%2BpIvs0u7YM2%2Fyg%3D%3D&X-Amz-SignedHeaders=host&X-Amz-Signature=614ac84d9646667ec99bbede02aa8481d5ab0c8f5dcc690c7042274afdb5a4a9
CollectWise is a Y Combinator-backed startup using AI to automate debt collection. They're hiring a Senior Forward Deployed Engineer to lead client implementations and reach $10 million in revenue within a year.

Lib0xc: A set of C standard library-adjacent APIs for safer systems programming

https://opengraph.githubassets.com/2c64935df94582561c7e37aaec96ca8dc23a30a38d207948e200f8457546e6a2/microsoft/lib0xc
lib0xc is a C library that aims to make systems programming safer by providing safer APIs and utilities. It uses the C preprocessor to expose its API surface and leans heavily on clang bounds safety extensions.

Show HN: Stop playing my matchstick puzzles, start building your own in seconds

Free online matchstick puzzle game with guaranteed solutions. Solve challenges that get harder as you progress. Create and share your own custom puzzles.

A Report on Burnout in Open Source Software Communities (2025) [pdf]

Open source maintainers face burnout due to lack of payment and unsustainable expectations. This leads to a crisis in the open source community, affecting mental health and self-worth.

Ask HN: Who is hiring? (May 2026)

Here are the job postings summarized in 2 concise English sentences each, not exceeding 200 characters:

The smelly baby problem

https://substackcdn.com/image/fetch/$s_!R2s5!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F8129d89b-1971-46f3-b369-7ada7a1d33c8_1024x686.jpeg
Benjamin Spock's 1946 book "Baby and Child Care" advised parents on childcare, while Procter & Gamble developed the first disposable diaper, Pampers, in 1961. Disposable diapers became a market leader, with Huggies eventually surpassing Pampers and dominating the market by the 1990s.

Show HN: WhatCable, a tiny menu bar app for inspecting USB-C cables

https://raw.githubusercontent.com/darrylmorley/whatcable/main/docs/screenshot.png
WhatCable is a macOS menu bar app that identifies USB-C cables and their capabilities. It exposes cable information, charging diagnostics, and connected device identities via a friendly menu bar popover.

Eka’s robotic claw feels like we're approaching a ChatGPT moment

https://media.wired.com/photos/69f11c49423c2e71c99af00a/master/w_1600%2Cc_limit/20260320-wired-eka-robotics-1221.jpg
A startup called Eka is developing a robot with advanced dexterity, allowing it to perform tasks like screwing in a light bulb and handling food. The robot's creators believe their approach could revolutionize robotics and enable robots to work in various settings.

Open source ballistic simulator with NASA SRTM terrain masking (Python/C#)

https://raw.githubusercontent.com/InsaneInfinity/Balistic/main/Islamabad.png
🇬🇧 A ballistic fire control simulator featuring NASA SRTM terrain masking (real elevation data, horizon scan algorithm), asymmetric blast zones blocked by real mountains, nuclear blast zones, radioactive fallout, cluster munitions, Coriolis effect and hybrid ballistic model. Built as microservices: Python/Flask + C#/.NET + Redis Streams. 🇵🇱 Symulator balistyczny z maskowaniem terenowym NASA ...

Integer Overflow Checking Cost

Integer overflow checks with diagnostic printing cause a 28% penalty for compression and 9% penalty for decompression in bzip2, while without diagnostics, the penalty is almost nothing. This is due to mis-optimizations in the compiler, specifically with clang and gcc, which cause a 4x-6x performance hit.

Direct electrochemical black coffee quality appraisal using cyclic voltammetry

https://media.springernature.com/w215h120/springer-static/image/art%3A10.1038%2Fs41598-024-80385-3/MediaObjects/41598_2024_80385_Fig1_HTML.png
Researchers used cyclic voltammetry to measure coffee strength and roast color without sample preparation. The technique relates beverage strength to total dissolved solids and roast color to the ensemble chemical composition of the coffee.

Create an MP4 video of a web page scrolling at a steady speed

https://opengraph.githubassets.com/21390cf466a136051b0cb92aa7dc60c06d959db9e182d8a4595ac260f081223a/upenn/web-scroll-video
A tool creates an MP4 video of a web page scrolling at a steady speed using headless Chrome and ffmpeg. The tool uses a cue sheet to revise the video with notes like "make the first scroll slower" or "add a two second pause before the click".

Apocalypse Early Warning System

The site tracks business jets using FAA registry data and ADS-B Exchange heatmap files, comparing current airborne counts to historical baselines for anomalies. It estimates max people on board by mapping aircraft models to published capacities and scaling unknowns by average.
https://opengraph.githubassets.com/d7888a7f657264301cd0dccad9a87210c3c0bd3c6b992abd756013f161f54f2c/whohas/whohas
whohas is a command line tool that queries package lists from various distributions. It displays package version information, URLs, and repository details for specified packages.

DeepSeek V4–almost on the frontier, a fraction of the price

https://static.simonwillison.net/static/2026/deepseek-v4-flash.png
DeepSeek released V4 series models, DeepSeek-V4-Pro and DeepSeek-V4-Flash, with 1 million token context Mixture of Experts. They are priced at $0.14/million tokens input and $0.28/million tokens output for Flash, and $1.74/million input and $3.48/million output for Pro.

I built the Playwright for desktop apps. 80% token savings

https://raw.githubusercontent.com/lahfir/agent-desktop/main/assets/Tutorial.gif
agent-desktop is a Rust-based CLI for native desktop automation, providing structured access to applications through OS accessibility trees. It supports various programming languages and offers features like progressive skeleton traversal and AX-first interactions.