Intro A while ago I have evaluated the powering options for my smart home sensor nodes. One thing was really clear: I would try to avoid small batteries and using anything else besides the common AA(A) sizes. This makes nodes last a long time on a battery that is easy and cheap to find. And I was right about this – the plethora of commercial remotes and sensors that I also used (like the ikea ones)… Continue reading
Smoke from soldering is not healthy to breathe. I built this easy fix a while ago. Continue reading
Intro Back when I was deverloping the PSU burner, I wanted to have the Analog Discovery isolated from the common ground, to avoid noise and other issues. Since I did not have a way to do this, I ended up using a laptop on battery for measurements. But for long term, I needed to have this isolation. Unfortunately, things that can isolate USB at 480Mbps or faster are too expensive to justify. The solution The… Continue reading
My experiences and recommendations for cheap electronic modules from China. Continue reading
A simple on-line 5V UPS for raspberry pi and others, using off the shelf modules. Continue reading
Simple way to guarantee correct driving of WS2812 from a 3.3V micro, without any special parts, just another WS2812 LED. Continue reading