The best Hacker News stories from Show from the past day
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Show HN: 10x better performance from the Coding Harnesses with LLM-wiki
Show HN: Deconvolution – a Rust image deconvolution and restoration crate
I've been working on deconvolution, a comprehensive Rust image deconvolution and restoration library. Deconvolution implements 28 different image deconvolution/restoration methods which range from practical blur removal techniques to research-grade scientific imaging algorithms.<p>Features:<p>- Top-level functions use image::DynamicImage and return images<p>- Inverse filters, Wiener, Richardson-Lucy, constrained, proximal, Krylov, MLE restoration<p>- Blind Richardson-Lucy, blind maximum likelihood, parametric PSF estimation<p>- Kernel2D, Kernel3D, Transfer2D, Transfer3D, Blur2D/Blur3D<p>- Gaussian, motion, defocus, microscopy models, support utilities, PSF/OTF conversion<p>- Edge tapering, apodization, range normalization, NSR estimation<p>- Deterministic blur, noise, synthetic fixture generation<p>- ndarray support for 2D image arrays and 3D volume<p>this project is a WIP, of course:)
Show HN: Spin Lab
Hey HN, I built Spin Lab: a browser-based interactive explainer for table-tennis spin. It visualizes topspin/backspin, spin rate, ball trajectory, bounce behavior, and why the opponent’s return reacts the way it does. I built it because spin is central to table tennis, but most explanations are either too hand-wavy or too static.<p>Thanks Fable, we miss you
Show HN: We built an 8-bit CPU as 2nd year EE students
Hi! me and my friends together built an 8 bit CPU implemented in Logisim purely from scratch. The control unit of this system does not implement the generic microcode ROM or any kind of RAM. This was made purely from discrete logic gates and coded the system to run different programs.<p>key features:
Custom 16-instruction Harvard ISA, 8-bit fixed
format, 4 general purpose registers<p>Hardwired control unit built entirely from AND/OR gate logic matrix<p>Dual-phase clocking to eliminate race conditions<p>Bootstrap Control Unit that cold-boots via ROM-to-RAM transfer
Early-exit conditional branching that saves upto 25% cycles when conditions aren't met<p>Full design specification document with version control<p>Since this was our first time doing such teamwork and a new thing we used RISC based system that fetches an 8-bit instruction from Instruction memory 4 bits of which translate to an instruction the last two bits are for source and destination registers.
There are a total of 4 registers in the system with two memory units namely Data SRAM and I SRAM, the system follows a Harvard architecture.<p>There are design discrepancies too since it was our first time designing such a system and on top of that completely hardwired too.<p>To solve the problem of cold booting a bootloader is present too that copies the contents of a temporary ROM into instruction RAM and then hands over the reins to the CPU.<p>We also implemented conditional branching as well as early exit branching too that only checks for zero or carry flag and branches without wasting cycles, if the conditions are not met the Program counter increments.<p>Moreover we also created a complete documentation with version control describing each necessary part assuming prior knowledge.<p>Please take a look at it at <a href="https://github.com/c0rRupT9/STEPLA-1" rel="nofollow">https://github.com/c0rRupT9/STEPLA-1</a><p>For future development I want to implement a RISC CPU using FPGA's and connect it to an actual DRAM. We are also selling the full spec document and Logisim files for $5 to fund our passion
<a href="https://tcfdiq.gumroad.com/l/zyyux" rel="nofollow">https://tcfdiq.gumroad.com/l/zyyux</a>
Thankyou!
Show HN: Gerrymandle - Daily puzzle game where you redraw electoral districts
Show HN: Are You in the Weights?
With more traffic moving off-web and into LLMs, I got curious about what traces we leave "in the weights". My design partner and I built a site in the past few weeks that checks recognition across frontier and small models. It queries many of them in parallel, clusters the responses, and tells you how strongly they recognize you. Happy to answer any questions here!
Show HN: I built 184 free browser tools – PDF, image, dev, AI tasks, no upload
Show HN: cuTile Rust: Safe, data-race-free GPU kernels in Rust
Show HN: Capacitor Alarm Clock
I made an alarm clock that blows up capacitors to wake you up.<p>There are more details on the Github repo but it's made from an esp32-c3 as the microcontroller, with 3 capacitor slots. There are relays on each capacitor slot to put 15v reverse voltage on the capacitor, with 5.1 ohm resistors on each slot for current limiting in case the capacitor shorts out. I also chucked in an SSD1315 OLED to show the time and a menu to configure it, although there's a web UI as well. The esp32 also means you can fetch the time from NTP.<p>It also functions as a small heater since I used LDOs to step down 15v to 3.3v for the esp32, I was lazy and didn't use a buck converter circuit :)
Show HN: Capacitor Alarm Clock
I made an alarm clock that blows up capacitors to wake you up.<p>There are more details on the Github repo but it's made from an esp32-c3 as the microcontroller, with 3 capacitor slots. There are relays on each capacitor slot to put 15v reverse voltage on the capacitor, with 5.1 ohm resistors on each slot for current limiting in case the capacitor shorts out. I also chucked in an SSD1315 OLED to show the time and a menu to configure it, although there's a web UI as well. The esp32 also means you can fetch the time from NTP.<p>It also functions as a small heater since I used LDOs to step down 15v to 3.3v for the esp32, I was lazy and didn't use a buck converter circuit :)
Show HN: Inkwash, a watercolor sketching app and explanation
I've made a drawing app based on my physical sketching practice, using fluid sim and some shader tricks to mimic watercolor-style ink washes. Best used on iPad or with a drawing tablet. The linked article shows how the core engine works, with plenty of little interactive demos. It was fun to make, sharing in hopes others find it fun too :)
Show HN: Inkwash, a watercolor sketching app and explanation
I've made a drawing app based on my physical sketching practice, using fluid sim and some shader tricks to mimic watercolor-style ink washes. Best used on iPad or with a drawing tablet. The linked article shows how the core engine works, with plenty of little interactive demos. It was fun to make, sharing in hopes others find it fun too :)
Show HN: High-Res Neural Cellular Automata
Neural CAs model self-organizing pattern formation.<p>Now they can generate patterns at HD resolution in real-time, enabled by turning each CA cell into a Neural Field.<p>Try 3 demos: grow a pattern from a seed (and damage it, it heals), synthesize PBR textures that can regenerate, or create 3D textures like clouds.
Show HN: High-Res Neural Cellular Automata
Neural CAs model self-organizing pattern formation.<p>Now they can generate patterns at HD resolution in real-time, enabled by turning each CA cell into a Neural Field.<p>Try 3 demos: grow a pattern from a seed (and damage it, it heals), synthesize PBR textures that can regenerate, or create 3D textures like clouds.
Show HN: An 8-bit live gamecast for baseball
Hey HN, I built a website to watch live baseball games in an 8-bit broadcast. It takes live MLB data streams and converts them into near real-time pixel art gamecasts.<p>Been waiting to share this for when there’s actually a good slate of games happening since the site is pretty bare otherwise.<p>Here is today's schedule:<p>Mets @ Reds - 9:40am PDT
<a href="https://ribbie.tv/watch/game/824503" rel="nofollow">https://ribbie.tv/watch/game/824503</a><p>Royals @ Nationals - 10:05am PDT
<a href="https://ribbie.tv/watch/game/822721" rel="nofollow">https://ribbie.tv/watch/game/822721</a><p>Marlins @ Phillies - 10:05am PDT
<a href="https://ribbie.tv/watch/game/823450" rel="nofollow">https://ribbie.tv/watch/game/823450</a><p>Tigers @ Astros - 11:10am PDT
<a href="https://ribbie.tv/watch/game/824178" rel="nofollow">https://ribbie.tv/watch/game/824178</a><p>Padres @ Cardinals - 11:15am PDT
<a href="https://ribbie.tv/watch/game/823044" rel="nofollow">https://ribbie.tv/watch/game/823044</a><p>..and another 14 games throughout the later day.<p>I'm still early on in this project, but I've tried to add little details with actual stadiums, day and night modes, between inning graphics and interstitials, live scoreboards, etc.<p>Would love any feedback and ideas. Thanks for checking it out!
Show HN: An 8-bit live gamecast for baseball
Hey HN, I built a website to watch live baseball games in an 8-bit broadcast. It takes live MLB data streams and converts them into near real-time pixel art gamecasts.<p>Been waiting to share this for when there’s actually a good slate of games happening since the site is pretty bare otherwise.<p>Here is today's schedule:<p>Mets @ Reds - 9:40am PDT
<a href="https://ribbie.tv/watch/game/824503" rel="nofollow">https://ribbie.tv/watch/game/824503</a><p>Royals @ Nationals - 10:05am PDT
<a href="https://ribbie.tv/watch/game/822721" rel="nofollow">https://ribbie.tv/watch/game/822721</a><p>Marlins @ Phillies - 10:05am PDT
<a href="https://ribbie.tv/watch/game/823450" rel="nofollow">https://ribbie.tv/watch/game/823450</a><p>Tigers @ Astros - 11:10am PDT
<a href="https://ribbie.tv/watch/game/824178" rel="nofollow">https://ribbie.tv/watch/game/824178</a><p>Padres @ Cardinals - 11:15am PDT
<a href="https://ribbie.tv/watch/game/823044" rel="nofollow">https://ribbie.tv/watch/game/823044</a><p>..and another 14 games throughout the later day.<p>I'm still early on in this project, but I've tried to add little details with actual stadiums, day and night modes, between inning graphics and interstitials, live scoreboards, etc.<p>Would love any feedback and ideas. Thanks for checking it out!
Show HN: Voice Age Verification
I miss the old web. As a kid I could type in "a/s/l" in AOL messenger and chat with someone my own age, without worrying about the dangers that lurk on the web today.<p>After seeing what happened to Omegle, a question stuck: is there a simple way to do age verification that both keeps people safe and doesn't contribute to a surveillance state?<p>After a year of hard work, that question resulted in AGEWARDEN. Each part of the service puts people first. No tracking, nothing stored (it's more difficult these days to NOT collect data :smh:).<p>Please give it a try if you have a moment <a href="https://agewarden.ai/demo" rel="nofollow">https://agewarden.ai/demo</a>. Feedback is very much welcomed.<p>GG
Show HN: VoiceDraw – Talk system design out loud, the diagrams draw themselves
I was frustated by having to draw system design diagrams by hand when discussing it with my team mates or in an interview. So I thought "Wouldn't it be great if someone draws it for me, while I think out loud?".<p>That is when I came up with VoiceDraw. You can just think out loud or discuss your system architecture with a friend/interviewer, the diagrams are automatically drawn along with your reasoning, open questions and tradeoffs beautifully written on to the side.<p>Demo Video: <a href="https://youtu.be/36PgHKSuccE" rel="nofollow">https://youtu.be/36PgHKSuccE</a>
Show HN: Veterinarian turned founder, AI lawn diagnosis
I know, it's kind of weird. What is a veterinarian doing creating an analysis tool for lawn problems?<p>Frankly, the idea was born of my own lawn care struggles. Endless lawn care company fees without any actual improvement. Googling problems and finding generic solutions without regional considerations. One time I overseeded my grass not realizing I had to actually put soil down too.<p>One day, I decided to run lawn pictures through AI and found some pretty helpful information. So I decided with my clinical background (the idea of treating the cause, not just the symptoms), as well as tech savvy, I would create an AI tool where homeowners can upload pictures of their lawn, enter their ZIP code, and get a diagnosis tailored to their location with actionable next steps in just 15 seconds.<p>Completely free. The platform is monetized with affiliate sales (if a user elects to purchase through one of our Amazon or other links) and by selling exclusive rights to individual ZIP codes to lawn care companies seeking warm leads. Users can pursue their own DIY plan, purchase a lawn care subscription service, or contact a local lawn care system.<p>I'd love if you'd test it out, toy with it, try to break it, and give me your feedback. Any feature requests would be super helpful.<p>Thanks! Excited to hear your thoughts.<p>Andrew