Writing software: JavaScript, Node.js, web development, visual programming, Linux, tools and tutorials.
430 posts · page 17 of 18
Node‑RED is a low‑code visual programming platform that lets users design event‑driven applications by connecting nodes on a canvas, thereby simplifying code composition and…
The post is a motivational treatise urging the reader to recognize themselves as a “Brilliant Genius” by mastering language and computation, drawing on Einstein‑Hawking examples…
The post celebrates the author’s enthusiasm for creating new objects, sounds, and a text‑based game world, depicting invention as an ongoing, empowering creative journey.
The post unfolds three interlinked lessons: first, the Raspberry Pi as an accessible gateway into programming, Linux command‐line use, and hardware control via GPIO pins; second,…
The post proposes an open‑source local‑network appliance that mirrors selected websites into a single database, prefetching and caching their content so users can browse them…
The post argues for creating a new home‑network firewall that logs and blocks outgoing traffic from expensive IoT devices, so CEOs can build a passionate, user‑friendly solution…
The author explains how mastering high‑level programming languages opens up automating creative tasks in music and visual arts, encouraging readers to use tools like…
The author recounts his journey to create a simple generative‑art sketch in p5.js that illustrates how colors can be generated using the HSL model. After explaining hue,…
The author explains that people—including US Congress members—are still confused by complex data‑breach issues and are not getting clear answers from companies. They propose…
I recently created a simple p5.js sketch called **math‑101** (available on <https://editor.p5js.org/catpea/sketches/> and the GitHub repo <https://github.com/catpea/p5>) that…
Using Blender’s free open‑source 3D modeling tools, the post explains how to design manifold models for 3D printing by constantly checking geometry with the “Check All” button;…
I built a DIY MP3 player by repurposing an old CD‑ROM drive as the chassis for a small PCB that plays pre‑converted MOD files, and I attached a Bluetooth “shutter” remote to…
I built a minimalist portable Linux audio player that runs on battery power and an audio card without a screen or keyboard; I use a cheap Bluetooth “shutter” remote (normally…
The post explains how to use the Linux command line for tasks such as playing media, downloading files, and retrieving data from APIs, illustrating with examples like using wget,…
Linux is just the kernel part of an operating system; when combined with GNU’s user‑level tools (and sometimes a different kernel like Hurd), it forms GNU/Linux, which many…
I’ve been tinkering with a Raspberry Pi Zero W since I switched to Linux in 1998, and recently built a compact music‑player for my bike by powering the Pi from a 15 k mAh…
I learned how to make a Raspberry Pi button recently, and I researched it my way. [I wanted to see if there was a way to do it on the command…
In this whimsical post the author recounts a bicycle ride that inspires a foray into Linux and audio processing; he sets up a Raspberry Pi as an inexpensive workstation, installs…
The post explains how to start web development by picking manageable technologies, then details the many layers of hosting and security that come into play once your server is…
The post outlines a three‑step plan to build an integrated system: first, create a computer game that earns players fame; second, develop an editor and automator so they can…
In this whimsical reflection, the author recounts various introductions at tech events—calling themselves a computer scientist, philosopher, troublemaker—that humorously shaped…
The post is a beginner’s guide to starting programming on a Raspberry Pi using Node.js. It explains how easy it can be to learn by building a small, existing project called…
I revisit my long‑time music‑generation project several times, rewriting the code over the years and finally settling on a small, open‑source tool called **westland** that uses…
The author proposes a simple, user‑friendly system for home automation based on single‑board computers (like Raspberry Pi) and chat‑room style interfaces where devices act as…