tspi.at

Basic behaviour of thermionic emission cathodes

28 Apr 2021 - tsp

Reading time 12 mins

A short summary about the operation and characteristics of thermionic emission cathodes, the current limiting factors and the most important failure modes

Building a simple improvised electron gun from common of the shelf components

28 Apr 2021 - tsp

Reading time 8 mins

Mini blog article that summarizes the build of a simple 2 mA beam current electron gun from common of the shelf components gathered from the hardware store as well as some 3D printed components.

Apocalyptic doomsday scenarios predicted by physics

05 Apr 2021 - tsp

Reading time 27 mins

A rather unusual blog post for this site, a collection of various doomsday scenarios predicted or at least allowed by physics that might happen for sure (but don't be frightened, usually with a really low probability). Note that this is not an in depth article but just a short overview of some scenarios.

Mobile user friendliness with code samples and Googles search console

05 Apr 2021 - tsp

Reading time 8 mins

A pretty short blog post about a small nuance that might lead to a huge hit in your search ranking when using static site generators that use nested pre and code tags and may trigger even more errors in case one doesn't use mobile first approach for one's stylesheets

Windows 10 recovery from damaged registry hive files

04 Apr 2021 - tsp

Reading time 9 mins

One approach to recover a Windows 10 system from damaged registry hive files in case of missing restore points and registry backups.

Cutting glass vacuum tubes using hot wire

02 Mar 2021 - tsp

Reading time 4 mins

Something easy and simple. How to cut glass tubes and other glass parts using electrically heated hot wire.

RS485 communication using Atmel ATMega328P

10 Feb 2021 - tsp

Reading time 21 mins

Summarizing a method to use RS485 with MAX485 driver ICs on Atmel AVRs (specifically on the ATMega328P) utilizing the on chip USART.

Simple webcam access from C

06 Feb 2021 - tsp

Reading time 26 mins

This blog post summarizes how one can access common webcams from C on operating systems supporting the video4linux (V4L) API. This information can be used to built robots, surveillance systems or simply communication applications.

How to extrude polygons in OpenJSCAD

02 Feb 2021 - tsp

Reading time 3 mins

Since I always have to lookup how this works in some examples or hidden deep in the manual I decided to write a short summary about linear extrude, rectangular extrude and rotate extrude

Automatic sitemap generation with Jekyll

14 Jan 2021 - tsp

Reading time 4 mins

A short summary on how to generate a sitemap for search engines automatically when using the Jekyll static site generator


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Dipl.-Ing. Thomas Spielauer, Wien (webcomplains389t48957@tspi.at)

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