Minimising screen brightness in Ubuntu

I like working at night, but nearly every laptop I've tried with Ubuntu can't reduce screen brightness to comfortable levels. Thankfully there is a convenient workaround. Under Ubuntu 24.04 / Wayland find Accessibility -> Zoom -> Colour filters and adjust to your liking. You probably want to pin the magnification factor to 1.00, too. The … Continue reading Minimising screen brightness in Ubuntu

cloudflared docker health check

Cloudflare's cloudflared container doesn't come with a good health check - or so it seems [1]. The functionality is there, though. The tunnel needs to be started with metrics enabled (here: exposed to 127.0.0.1:20241) and the health check needs to call the proper check. cloudflared: image: cloudflare/cloudflared:latest ... command: tunnel --metrics 127.0.0.1:20241 run healthcheck: test: … Continue reading cloudflared docker health check

An even better switching amplifier

From the producer of A switching amplifier [AM1], A better switching amplifier [AM2] comes part 3: An even better switching amplifier. A quick recap: we're looking into class D switching amplifiers for their high efficiency and power output. The first amplifier sampled the input signal by taking voltage snapshots with a capacitor and measuring the … Continue reading An even better switching amplifier