Stuff I do

TDR or Time Domain Reflectometry is a method for measuring transmission lines - cables and alike - used for the transmission of high-speed signals. TDR can be used to check the length of the cable, can detect the presence and the place of a short, break, and other errors. First, let's take a look at what we're going to build and what we can do with it.

Why? Since the company I'm working with uses Kubernetes in production, I like to have a sandbox handy to try upgrades and just for general experimentation. Prerequisites I'm using Ubuntu 19.04 "Disco Dingo". I'm going to install Kubernetes v1.15.4. The current newest version works a bit differently that makes the latest stable flannel release not to work properly. The procedure below can probably be repeated with now-current (in reader-time :) ) versions as long as they're compatible. Docker The docker I choose is version 18.09 . Check the supported docker version with your  Kubernetes version. Do not skip this step. I found this information in the release notes for v1.15:  https://v1-15.docs.kubernetes.io/docs/setup/release/notes/ Flannel I'm using flannel with the local installation. The latest stable at this time is v0.11.0. I found no information on the compatiblity of different flannel and Kubernetes versions, so I just tried the late

Since I'd like to keep up with the head-spinning pace of interesting articles, let me present you this year, :) the In the last episode I described an ion chamber radiation detector. It works very well: stable and sensitive enough for doing simple experiments. It can be improved though in several ways. Here follows a series of ideas and a circuit diagram. :) I did not build this yet, but I'll build it "soon". In this decade, or the next. :P