Comparing the efficiency of DC voltage boost circuits

Overview & disclaimers This post compares the power efficiency of some voltage boosting circuits. The circuits discussed here are: Buck converter Parallel buck converter Serial buck converter Pulsed transformer Joule thief Honorary mentions What we're doing here is neither complete nor scientific and aspires to more than it delivers. Comparison base line The generic version … Continue reading Comparing the efficiency of DC voltage boost circuits →

Canon EOS M10 / M100 / M200 as web cams under Linux

Not an actual picture of the EOS M10/M100/M200 [Update 2026.01.03] additionally discusses the M200. Since telework became a reality for me, I have constantly tried to upgrade my audio and visual setup; not for the satisfaction of my own vanity but out of mercy for the people who have to stare at me or listen … Continue reading Canon EOS M10 / M100 / M200 as web cams under Linux →

Ubuntu 24.04 on the HP Victus

This is a short follow-up on Ubuntu 22.04 on the HP Victus [UVC] Hardware support is just as good/bad as with Ubuntu 22.04, so all findings from [UVC] apply here, too. The display manager is still X11, I have not tried Wayland. Video hardware acceleration with VLC and SMPlayer snap installations now works, but requires … Continue reading Ubuntu 24.04 on the HP Victus →

Run an SFTP server in a container

I'm just dumping this here for now; maybe some day a bit of commentary might follow. I needed a quick, easy and (hopefully) secure way to spin up an SFTP server. Since I don't want to get into complex configuration, a Docker container seems a safe choice as it isolates the SFTP server from the … Continue reading Run an SFTP server in a container →

Simplified double push-pull amplifier

There exists a simpler design for the double push-pull amplifier with cross-over compensation [DPP]. A quick recap of the previous design: the input signal is divided into a reference phase and an inverted phase, each phases are amplified separately and drive two push-pull amplifiers [PPA] respectively. What happened so far: while in absolute terms simple, … Continue reading Simplified double push-pull amplifier →