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ELK Stack with log4j
Boring introduction that no one ever readsELK stack (or Elastic Stack) is comprised of three programs that, when used together, act as a full-scale centralized logging and log analytics solution. Those...
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[New part] Trying out APDS-9960 - Gesture, proximity, ambient light and RGB...
Foreword One of the aspects of any tinkerer's (and mine) activities that goes largely overlooked is learning about, sourcing and trying out new electronic parts. The industry continuously churns out...
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WS2811 POV display on PC fan
As time goes on, new possibilities of creating cool devices seem to endlessly pour on my head. This time I was invited to take part in Eurobot 2018 national qualifications to compete for the chance of...
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Driving brushless DC motors with Arduino on the cheap using ESCs for RC...
Brushless DC (BLDC) motors really are at least one step above the conventional brushed ones: they offer higher torque and RPM then the same-sized brushed motors. However, they require more complex...
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SIM900A 2G module + Hologram SIM card = winning combination in category "dirt...
ForewordIoT, the buzzword of this decade, sometimes enters even the minds of people considering themselves resistant to fad, with me among them.One day I was browsing the Internet and saw a company...
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ros-omni-base: ROS mobile robot base for everyone. (Work in progress)
Foreword or why I'm doing this.With exploding expansion of basic knowledge about microcontrollers and single-board computers of the first decades of 21st century, coinciding with abundance of cheap...
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SIM900A 2G module + Hologram SIM card. Publishing sensor measurements to...
This is the second part of the series called "SIM900A 2G module + Hologram SIM card = winning combination in category dirt cheap?". In the previous post I demonstrated how to perform some essential...
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Nocturnal solar-powered lamp from a mason jar
Solar panels are cool, right? All techniques of extracting energy from environment have always fascinated me, with solar panels standing out because of their inexpensiveness and ubiquity. I've been...
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Budget traveler's guide to Zanzibar (July 2018)
Why do people choose Zanzibar as their vacation destination? Pristine white sand beaches washed by azure waters of the Indian Ocean seems to be the prime and dominant reason, but for some that's not...
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Solr 7 beginner tutorial, part 2: delta-import, debugging tips.
In my previous tutorial on the basics of Solr, I didn't manage to fit everything I wanted to share in one post. Now I finally got around to wrapping up the subject with a subset of data import called...
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How to organize your photos and videos from disparate sources (cellphones,...
ForewordFor the last decade we've been living in the age when affordable cloud storage services are blooming and proliferating. Hardly anyone stores impressions of their precious moments on personal...
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Детектор отсутствия напряжения в сети
Дополнение к видео на моем канале:Схема Ссылка на PDF А процессе тестирования нашласть пара ошибок в схеме, поэтому схема представленная тут отличается от того что получилось в видео:Выключатель...
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Growing mushrooms at home - beginner's experience
BackgroundTechnology, biology, chemistry and natural sciences in general are becoming more and more accessible by people with even modest incomes. The upshot is a multitude of projects carried out by...
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Lab PSU + universal battery charger for minimalists.
Just like many electronics hobbyists out there, I don't really have a dedicated workshop room. That's why the space is at a premium for me. Take a look at the room I used to do electronics work in my...
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How I restore unfinished recordings from Canon camera in Windows/Linux/Mac.
PrefaceThe year is 2019, and I still prefer to take pictures/film videos using a separate physical camera, and in the meantime most people just casually whip out their phone and tap its screen to do...
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Charging and discharging a supercapacitor, calculating real capacity.
This will be a short post showing how to safely work with supercapacitors.Before you continue reading, I'd like to clarify that I'm not responsible in any way for any injuries or deaths caused by other...
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Making Waveshare 5 inch HDMI LCD work with BeagleBone Black
I've recently bought one of these displays for Raspberry Pi that you can get at cutthroat prices (about 25 USD at the time I'm writing this). [link]FrontBackDisplay in question is usually listed as "5...
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Homemade solar harvester to power your outdoor projects.
This will be a post containing detailed instructions on building a solar harvester. Solar harvester is a device that takes in solar power - in most cases using solar panels - and stores it for future...
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18650 Lithium battery pack without spot welder.
This is almost too simple to describe it in a blog post, but I haven't found any mentions of someone making such a battery pack online, so here goes: People seem to be obsessed with building battery...
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Custom leather passport cover with laser cutter.
This is going to be a guide/story about making an absolutely customized leather passport cover with a laser cutter. I'll share the SVG images so you can make your own after reading through this...
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Outdoor solar harvester v. 2.0
What's newNew battery holder type supported: BLM (in addition to the old one, CGS).New charger boards supported: CN3791, MCP73871, TP4056 (in addition to CN3065).Most importantly: any arbitrary size of...
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Airflow + PySpark over Livy. Sessions and batches.
Recently at work we've been trying to find a way to run Spark jobs from Airflow that best suits our needs. Turns out, there's more than one way to skin a cat. To sum up our findings, you have a choice...
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3D modeling off-the-shelf PCBs in KiCAD and designing enclosures for them.
This is a writeup of an ongoing experiment. Usually when ordering ready PCB modules, we rarely want to use them as-is. That's why we design enclosures for them (or better yet, find it designed by...
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DIY External Battery Setup for Your Sony Alpha Series Camera
Here I'm presenting my solution to the problem of long timelapses with Sony A6000 series cameras. Sony A6000 battery life is quite good for shooting stills and moderate-length videos, but how would...
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Smart lighting that won't cost you a fortune: a hardware-centered tutorial.
It went like this: I stumbled upon this video when I was just about to renovate my new apartment, and was immediately captivated: I'm usually skeptical of all things "smart home" - I want my home to...
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