N.B. An enhanced version is now available, with specification table references and more detailed field explanations. 2026-08-03.

The ARINC 424 specification is the universally accepted standard for encoding aeronautical navigation data. Databases that follow it store that data in fixed-length, 132-character records. I created a utility that parses a single ARINC 424 record and prints the fields along with column numbers and plain-language explanations. The Python arinc424 module does the heavy lifting; I provide a wrapper around it, plus the logic that maps fields to the column numbers used in the official specification.

As a Challenger 650 captain, I fly routes between North America and Europe with some frequency. Dealing with the interconversion of imperial and metric units is a challenge; so I create a Lua script that runs in the X-Plane FlyWithLua plugin.

Once installed, the script allows you to enter the required trip fuel, current onboard fuel, fuel density and metric vs imperial units and outputs the desired fuel uplift. You can also select to take 10%, 15%, 20% extra fuel. This is a feature that I added because SimBrief seems to underestimate my fuel burn.

As a pianist, I use Calendar on macOS and iOS to plan each day’s practice. On heavy days I may have over a dozen practice blocks, so the calendar gets crowded quickly and it becomes easy to miss non-practice events. A calendar that looks like this makes the problem obvious:

What I really wanted was a quick way to toggle a group of calendars at once on macOS. In my case, that group is the set of works I am currently practicing (for example, specific Brahms and Schubert calendars). Your grouping might be completely different, depending on your purpose, but the same approach applies.

This is why I created KiCadBoardOutlineGenerator, a script to generate board outlines from dimensions you specify.

Facebook and Reddit are blocking access to a site that unmasks otherwise anonymous ICE thugs. F*ck you Reddit and Facebook.

So here are the resources being blocked:

• ICEList - the goal is to unmask these thugs. Crowd-sourced identities of ICE Nazis.
• Article about ICEList in The Guardian - this is the article that Reddit is blocking

Although I’ve used Indigo — the macOS home automation ecosystem — for over a decade, I never picked up on the fact that Actions attached to Schedules, Triggers, and web UI elements are not executed sequentially. The application user interface strongly implies sequential execution, but not only is that not guaranteed, the app actually attempts to execute the actions in parallel.

See this note buried in the documentation:

Important! While you can order the actions in any order you like, Indigo will attempt to execute all actions in parallel. It’s not always possible for various reasons, but that’s the intent. If you want to order the execution, then you’ll need to add delays which will delay the action’s execution from the time of the event. So, if you have 3 actions and you want the first to execute immediately, the second to execute a minute after the event, and the third to execute two minutes after the event, then add a one minute delay to the second and a two minute delay after the third.

This is just a quick post on how not to initialize a GPIO in ESP-IDF. A tutorial on Embedded Explorer discusses GPIO use in ESP-IDF and suggests initialization in this way:

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"

#define LED_PIN     GPIO_NUM_32
#define BUTTON_PIN  GPIO_NUM_36

void app_main(void)
{
   gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);   
   gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);
   
   while(1) {       
      if (gpio_get_level(BUTTON_PIN) == 0) {  // If button is pressed
         gpio_set_level(LED_PIN, 1);         // Turn the LED on
      } else {
         gpio_set_level(LED_PIN, 0);         // Turn the LED off
      }
      
      vTaskDelay(1); // Add 1 tick delay (10 ms) so that current task does not starve idle task and trigger watchdog timer
   }
}

This of course works, but I wanted to clear up matters because I think this takes some major shortcuts. Here is what I would suggest instead:

The Bambu AMS 2 Automatic Material System is a peripheral unit that provides multi-filament selection and feed management for several Bambu Lab FDM printers. I use it with a P2S printer and have generally been satisfied with its operation. However, as with any printer, filament breakage does occur. Because filament in the AMS 2 is routed through a complex network of PTFE tubes, drive gears, and internal manifolds, removing broken fragments can be substantially more difficult than on single-extruder systems.