Show HN: Sirenfall, a civil defense siren synthesized in Web Audio https://ift.tt/nrPBLjy

Show HN: Sirenfall, a civil defense siren synthesized in Web Audio I built a cool browser scene, a shelter window over a dystopian city in the rain. Pull the breaker and a siren tower spins up. The wind-down is super unsettling and I love it. The siren is not a recording. Two port rings make a 5:6 dual tone, 515 and 618 Hz. The horn turns at 4 RPM and everything (loudness, brightness, doppler and stereo position) follows the horn angle you can see on the tower. Rain and thunder are the only recordings. Build it yourself, source is one HTML file and MIT: https://ift.tt/UPdruSi How it works: https://sirenfall.live/how-it-works Press F for fullscreen, S to save a picture. Landscape on phones. No cookies, no personal data, the only request besides audio is an anonymous page-count pixel. Appreciate any feedback and shoutout to the siren community! https://sirenfall.live/ September 4, 2026 at 02:14AM

Show HN: MesaOS – An operating system written from scratch in Rust https://ift.tt/4GUR9NO

Show HN: MesaOS – An operating system written from scratch in Rust Hello! I'm a student from Spain and I'm the creator of MesaOS, an open-source operating system written from scratch in Rust for x86_64. I've been working on it mostly by myself. MesaOS currently has: A hybrid kernel Preemptive multitasking A Linux driver shim with 400+ exported kernel symbols (still in development) HDA audio and WAV streaming A shell with around 82 commands VFS, RamFS and persistent initrd File persistence through automatic folder-to-ISO injection SMP / multicore support xHCI / USB 3.0 support It works on QEMU and on my HP 15s-eq2xxx laptop. Some of the things I'm currently working on are USB storage, TCP, Wi-Fi and more hardware support. Wi-Fi is one of the harder problems for me right now. My laptop uses a Realtek RTL8822CE, and there isn't much information available about it. The project is still very much a work in progress, but I've reached a point where I would like to have other people working on it with me. I'm especially interested in people who like operating systems, kernels, drivers, networking, Rust or low-level programming. I'm also transparent about using AI during development. The source code is generated using language models based on my instructions. I handle the architecture design, debugging, hardware testing and integration myself. There is also an English/Spanish Discord server for the project if anyone wants to discuss development or contribute. Discord: https://ift.tt/Ua20ZNb https://ift.tt/i2XQ3kG September 3, 2026 at 11:26PM

Show HN: Arbitale – emergent choose your own adventure game https://ift.tt/uNyjHZ9

Show HN: Arbitale – emergent choose your own adventure game Hi everyone! I am building Arbitale and it is currently in pre-alpha. I'm looking for play-testers who can give feedback on the product. The goal is to eventually have different characters in the game be their own agents, with emergent narratives that are totally unique to each playthrough. Each agent acts according to its own pre-written incentives. Would love to hear what you think! https://ift.tt/dFAH7n9 September 3, 2026 at 12:12AM

Show HN: SufferTrails, the Anti-AllTrails https://ift.tt/uVACKk9

Show HN: SufferTrails, the Anti-AllTrails Don't get me wrong. I love a good family-friendly hike as much as anyone else. But sometimes you want to be grimacing, not smiling, on the trail. SufferTrails is that, and not much else. All trails not allowed. https://ift.tt/ExP0yXv September 2, 2026 at 11:27PM

Show HN: Claude and ChatGPT need a datacenter. This runs on my phone https://ift.tt/0GuJLOx

Show HN: Claude and ChatGPT need a datacenter. This runs on my phone https://llmobi.pages.dev September 2, 2026 at 12:58AM

Show HN: HN Match Maker – Matching "Who Wants to Be Hired?" With "Who's Hiring?" https://ift.tt/qNmeUPd

Show HN: HN Match Maker – Matching "Who Wants to Be Hired?" With "Who's Hiring?" Hi! Every month the "Who Wants to Be Hired?" and "Who's Hiring?" Threads come through I would think to myself, "there should be a match maker for these two threads". So I had abacus.ai whip one up. The methodology is pretty simple, data is extracted from posts using an LLM, score matches based on salary, domain experience, remote/onsite, etc., and then eliminate incompatible postings, like 'looking for remote work' and 'onsite only'. The result is two views: jobs-by-user and user-by-jobs. If you've submitted a post to this month's 'Who Wants to Be Hired?", you can find your matching job listings at https://ift.tt/FrSxta4 , for example https://ift.tt/NAm5u8O --- Some observations when looking at the matches pair up right now: Poke around, let me know what you think! Ultimately, I hope this is actually helpful to some folks. https://ift.tt/IRmpdlo September 2, 2026 at 02:23AM

Show HN: Newton's Orchard – Browser-based space/gravity playground https://ift.tt/QEGva0O

Show HN: Newton's Orchard – Browser-based space/gravity playground Hi HN! My son spent a lot of time in 5th grade playing with the 2-dimensional PhET gravity/space sims[1]. His STEM class uses it, and he was playing with it at home, and has been looking for more. I found several space sims/playgrounds online, including NASA's Eyes on the Solar System[2], but nothing that seemed to offer a real progression from what he was getting out of the PhET sims, so I built Newton's Orchard over the summer for him. https://ift.tt/LoS4eBk The source is also published at https://ift.tt/WM9lH8n It features deterministic time scrubbing, all bodies are editable, different preset systems and experiments, missions to complete (complete 3 to unlock the blackhole object type and mission), and a gallery for user submissions. I would very much appreciate feedback from HN - particularly from the lens of making it engaging and illuminating for students, and anyone that would like to just get a feel for how gravity works. Thank you! [1] https://ift.tt/GL3J7t1... [2] https://ift.tt/gxk1W8n https://ift.tt/LoS4eBk September 1, 2026 at 10:13PM