TL;DR: JitPack converts Github repos to Maven repositories in near real time. Publishing dependencies to Maven central is hard and I don't care what everybody else says. Every time I need to publish a new release of one of my OSS projects I know I'll waste at least half a day. I wish it was … Continue reading Easily convert Github repos into Maven dependencies on the fly
Author: george georgovassilis
Skype and VLC cannot use v4l2loopback video device
I'm playing around with using DSLR cameras as webcams with gphoto (CLI to cameras over USB) and v4l2loopback (dummy video devices), which works with OBS but neither Skype nor VLC which will either show a black image or fail with an error message. Running VLC in verbose mode and digging a bit around showed that … Continue reading Skype and VLC cannot use v4l2loopback video device
Higher frame rate with Microsoft LifeCam and Linux
The Microsoft LifeCam is a versatile USB Webcam family which is supported well in Ubuntu Linux. Unfortunately it records HD videos only at low fps, but there is a workaround to get high resolution with 30 fps. Install guvcviewOpen guvcview, switch to the Video Controls tab and pick the LifeCamSelect 30/1 fps in the Frame … Continue reading Higher frame rate with Microsoft LifeCam and Linux
Plausible Science Fiction is anticlimactic
We come for the star ships but we stay for the alien cultures.I Sci-Fi is about ideas Science Fiction takes place in a setting of great scientific advancements. That is usually, but not necessarily ("a long time ago in a galaxy far, far away") the future. This is a future of intelligent machines, powerful weapons … Continue reading Plausible Science Fiction is anticlimactic
Nautilus browsing large windows share is slow
When browsing large windows (samba) shares with Ubuntu Nautilus (that's the equivalent of the Windows File Explorer) I observed that shares which include many files and directories (a few hundred) take a few seconds to browse over WiFi, but almost instantly display over a fast LAN. A similar difference in speed is noticeable when searching … Continue reading Nautilus browsing large windows share is slow
The improved differential amplifier (based on current mirror)
This circuit is an improved version of the differential amplifier built with a current mirror from last year. The previous circuit suffered from a design flaw which I realised only when trying to actually build the circuit with hardware: the collector resistors are way too small (actually 0Ω) for a sensitive circuit. The current going … Continue reading The improved differential amplifier (based on current mirror)
Increasing Android mobile network stability
My habitation/network carrier/phone combination-situation results sometimes in slow or no internet on my Android phone. I'll talk about a hidden setting which, when properly configured, can increase network stability on an Android phone. Please read the entire post before trying anything, there are severe caveats. Understanding the problem I've had Android phones since 2.2 and … Continue reading Increasing Android mobile network stability
Constant disk access with ext4 caused by kmmp
I don't know how I never noticed this, but the mechanical hard disks in the perfect NAS emit a clicking noise at regular intervals that never stops. The NAS runs Ubuntu 18.04 server, an md software RAID 6 with dmcrypt on top, formatted with ext4. Disk I/O is way too low to show anything useful … Continue reading Constant disk access with ext4 caused by kmmp
Jugaad takes agile to the extreme
Introduction Jugaad is an attitude towards delivery which originated in India and consists of three simple tenets: Humility: use whatever works without prejudiceOpenness: keep your options openFrugality: small expenses keep regrets small Jugaad is agility taken to the extreme and most suitable for projects with a high degree of change, risk and uncertainty. Nothing demonstrates … Continue reading Jugaad takes agile to the extreme
Voltage comparator with oscillator
Readers of this blog know that I'm fascinated by everything around switched amplifiers. The core piece of every switched amplifier is a voltage comparator. Today I'll write about a comparator design based on an oscillator. The simplest voltage comparator compares two input voltages A and B and outputs a high voltage is A > B … Continue reading Voltage comparator with oscillator
