• Quadropod - First moves

  29 September 2019 ⋅ diy quadropod

  Parts printing and assembly has finished. After initial calibration, I’m now writing simple scripts to see the limits of the platform. We started with push ups:

• Quadropod - New version

  27 September 2019 ⋅ diy quadropod

  

• Writing mnesia data migrations in Elixir

  7 June 2019 ⋅ elixir mnesia

  Migrating data in Mnesia is traditionally a dark matter. Even if you understand the concept of translating tables, it’s still not clear how to organize your migrations so that they are picked up and run during the application start.

• Схема проверки КТ117А

  19 March 2019 ⋅ electronics

  Cхема проверки однопереходного транзистора КТ117А с небольшим описанием.

• Aquarium lighting timer on Arduino ESP8266

  19 March 2019 ⋅ arduino esp8266 diy

  In this article I’d like to tell the story of building the lighting timer for my small 120 liter aquarium. Just when they said lights should go up and down on schedule I knew it it’s not going to happen in my house. Just won’t work that way. So I decided to automate it.

• Linking ESP8266 with Arduino

  29 November 2017 ⋅ arduino

  I found it super-hard to find meaningful info on how to link a tiny little ESP8266 (ESP-01 in my case) to an Arduino and talk to it.

• FFMPEG fade in/out expressions

  19 October 2016 ⋅ ffmpeg

  I’ve been playing with FFMPEG lately mulling over a plugin for Appcelerator Titanium and figured we’ll need a text rendering with nice fading in/out effect. There’s text drawing filter in FFMPEG, but not a function to easily fade it, so I came up with a couple of expressions of my own. I’m working with alpha channel here, but it can easily be applied to other properties.

• Easy options parsing in shell scripts

  16 July 2016 ⋅ shell

  This is an attempt to systemize my own knowledge of options parsing in shell scripts. I mainly work in Zsh, but this is compatible with Bash and possibly others.

• Elixir meets Docker.io

  16 July 2016 ⋅ elixir docker

  In usual conditions it’s preferable to deploy your Elixir / Erlang apps with exrm and a-la Capistrano derivatives like edeliver. There are cases when you either need to make it easily installable or handable to a client. In this rare cases packaging the app in the Docker image is worth the effort.

• Cross-platform app links

  23 May 2016 ⋅ android iOS titanium

  Here are some notes after the recent research into deep linking into the apps. The goal was to launch the app on clicks on links in email. Traditionally, we were using a custom scheme to register the app as a handler for, but this didn’t work quite well. So notes:

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