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Comment on Raspberry Pi Pico 15.6 KHz analog RGB to VGA upscaler (part 1? POC? WIP?) by Jan de Lange
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blog.qiqitori.com
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1 year ago
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eng
In reply to admin. Thanks! I ordered some D9 connectors to insert a breadboard between the PC and the monitor and start taking some measurements. Then see if I can create a 0-0.7V signal and then add a ADC. I plan to post my progress on the vcfed forum. If I get stuck and need your help, I will reach out to you.
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This post isn’t about the virtues of some editors versus others: that's already been written by somebody else (and it’s really good) – if you want to know why I use emacs, I suggest reading that instead. This post will help you understand why "extensibility" and "introspectability" are such prominent emacs features even without an emacs lisp background. Bridging the gap from spacemacs or doom emacs to a bespoke configuration w....
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The year was 2036. OpenAI had finally done it. After decades of press releases, quarterly existential crises, and machine learning papers so esoteric they made Finnegans Wake read like PopSci, they’d finished gpt-6z (revision 3) - a perfect, autonomous general intelligence. Its unveiling was a lavish affair. Tech billionaires in artisanal graphene turtlenecks mingled with venture capitalists who had fully replaced their blood with bespo..
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The year was 2036. OpenAI had finally done it. After decades of press releases, quarterly existential crises, and machine learning papers so esoteric they made Finnegans Wake read like PopSci, they’d finished gpt-6z (revision 3) - a perfect, autonomous general intelligence. Its unveiling was a lavish affair. Tech billionaires in artisanal graphene turtlenecks mingled with venture capitalists who had fully replaced their blood with bespo..
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In this tutorial, we’re going to walk step by step through creating an npm package using modern best practices (as of 2022).
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Yesterday, v0.12.3 of RGBMatrixEmulator released , featuring mainly non-functional changes around automated testing and a new CI pipeline that runs in GitHub Actions. For those not familiar with RGBME, here’s the full context . Long story short, it’s an emulator for Raspberry Pi HUB75 LED matrices. In the last few RBME releases I accidentally caused a a few bugs, so I set out to write some tests to help me avoid that in the future. It e....
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NYC #Alzheimer's Association hybrid event (in-person and Zoom) . Dementia Training Australia (DTA), Free online courses and resources . Woman claims Alzheimer’s symptoms were reversed after five years | CNN .
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Introduction In part 1 we took a high-level view on serialization and JSON. In this part, we’ll roll our sleeves and start working with JSON, focused on emitting JSON. You might think this is a basic topic, but there is much more to it than just calling json.Marshal. json.Marshal vs json.Encoder The encoding/json package has two main APIs: Marshal and NewEncoder. The Marshal function returns a []byte while the NewEncoder function will ..
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Yesterday, v0.12.3 of RGBMatrixEmulator released , featuring mainly non-functional changes around automated testing and a new CI pipeline that runs in GitHub Actions. For those not familiar with RGBME, here’s the full context . Long story short, it’s an emulator for Raspberry Pi HUB75 LED matrices. In the last few RBME releases I accidentally caused a a few bugs, so I set out to write some tests to help me avoid that in the future. It e....
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A comprehensive guide to understanding the Rails Asset Pipeline, its features, and its role in modern web development.
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Welcome back to another episode of our DnD campaign summaries. All events fictional. This blog post is unofficial Fan Content permitted under the Fan Content Policy. Not approved/endorsed by Wizards. Portions of the materials used are property of Wizards of the Coast. ©Wizards of the Coast LLC. The next morning, all of my headmates were merged into me, and Alice was in fox shape. After only a short breakfast, I had Ploop cast the Tongue....
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I recently gave (an unfortunately rushed) talk about arkaine - a maker-focused agentic AI framework I’ve been spending most of my time building. Slides for the talk are here
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I’m trying to reason about the behavior of this code, and I can’t decide if this is a stroke of genius or if I’m suffering from a stroke. Take a look at the code, and then I’ll discuss what I’m trying to do below: HANDLE hFile = CreateFileA ( "R:/original_file.bin" , GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL ) ; if ( hFile == INVALID_HANDLE_VALUE ) ....
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Comment on Raspberry Pi Pico 15.6 KHz analog RGB to VGA upscaler (part 1? POC? WIP?) by admin
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blog.qiqitori.com
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1 year ago
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eng
In reply to Jan de Lange. Yes, buying an ADC (shouldn't be expensive) would be the best option, especially if you have 16 shades of grey. (If you find that you actually only have (e.g.) three or four different levels, you could probably still implement it using discrete transistors without too much effort. This i..
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Can Rust replace C? This is a question that has been on my mind for many years, as I created and now am tech lead for upb , a C library for Protocol Buffers. There is an understandable push to bring memory safety to all parts of the software stack, and this would suggest a port of upb to Rust. While I love the premise of Rust, I have long been skeptical that a port of upb to Rust could preserve the performance and code size characteris....
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cPiArtFrame . DIY E-Ink clock update with more faces, github repo & full youtube tutorial . Show HN: E-Paper 7-color display showing the current weather | Hacker News .
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Reading crumbs structure: fermentation . Todays loaf and some advice after making 100+ loaves over 6 years .
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Learn how to automate Git commit messages using AI and Bash scripting. This tutorial shows you how to create meaningful, consistent commits with minimal effort.
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I already tried to write a blog post about AI. An article, discussing AI generated art, still festers in my drafts folder. As someone who enjoys 3D modelling, drawing, animating, someone who believes in art lifting our spirits, I find it pointless and distasteful. Not much to discuss. Here are some loose thoughts about AI, mostly from software development perspective, but not unique to it. I see coding as both a skill, which enables me ..
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More non photography things! This is extremely simple, and likely very well known to more experienced users of FreeBSD; however hopefully this will help someone searching for similiar info. The command is already built into FreeBSD: sesutil show This should result in output that looks something like this: ses0: <
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Comment on Raspberry Pi Pico 15.6 KHz analog RGB to VGA upscaler (part 1? POC? WIP?) by Jan de Lange
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blog.qiqitori.com
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1 year ago
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eng
Hi, these are all very valid points! 1) It is actually a 16 colors gray scale signal. So I am looking into a simple but fast ADC that can make it digital. 2) Level shifting and voltage change may indeed be required. I was told the output voltage ranges between -3 to +7V. But I'm not sure if this was measured with the monitor connected! So I may have to measure myself. 3) I found an IC that is designed for video level shifting. I posted it ..
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[i]Salutations, I hope all of you are having an excellent day.[/i] I was reading the MDN documentation regarding Canvas, and when I got to the animations section, I came across something I already knew but was terrified to accept: [b]It's all about Math
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lainchan.org
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1 year ago
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eng
Salutations, I hope all of you are having an excellent day. I was reading the MDN documentation regarding Canvas, and when I got to the animations section, I came across something I already knew but was terrified to accept: It's all about Math. It actually makes sense because, if you think about it, many successful computer scientists are or were mathematicians at heart (e.g. Mr. Guido van Rossum has a master's degree in Mathematic....
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In this post, I want to publicly list all my 2025 goals. This will help keep me accountable and more structured. Though I doubt I will be consulting it often.
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Comment on Raspberry Pi Pico 15.6 KHz analog RGB to VGA upscaler (part 1? POC? WIP?) by admin
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blog.qiqitori.com
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1 year ago
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eng
In reply to Jan de Lange. Hi, your input is analog, but you will find that there is no major difference between analog and digital when the signal is monochrome. The Pico of course expects a signal that is either 0V or 3.3V, and your display signal probably doesn't fulfill these expectations. Instead, it might be....
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Most companies building AI products today are stuck in the experimental phase, lacking the basic tooling and infrastructure needed to build reliable systems. It’s easy to spot once you know what to look for. Take the current trend of companies talking about load-balancing their AI operations across multiple providers. Sounds sophisticated, right? But it reveals something concerning about the state of AI engineering. Let me show you why.....
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Different types of coffee bean varieties available in India, their flavour profiles, and associated processing.
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Hexcom is a large, ongoing mission-based tactical play environment for Dungeons & Dragons 4th Edition, designed and operated as a Discord-native system rather than a traditional campaign. I created and ran Hexcom under a pseudonymous handle as both a game mode and an organizational experiment. At its core, Hexcom breaks play into short, self-contained combat […]
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Designing great resolver functions in GraphQL is quite unintuitive. Giving consumers the ability to describe their desired response payload means it’s possible for consumers to access fields via surprising paths through the graph, and this is something that can and should influence how you write your resolvers on a field level. Say you’re building a kanban board app like Trello or Asana. A board consists of many different named columns, wh..
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Here's my monthly newsletter about what I'm up to, which I send in place of social media. What I did in January - Moved to San Francisco 🌁 - Joined the engineering team at Chroma - Bought a record p...
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