270 lines
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270 lines
11 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta name="generator" content="Hugo 0.147.8">
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<div class="internal">
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<a href="/" title="Home" class="active">Home</a>
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<a href="/blog/" title="Blog">Blog</a>
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<a href="/projects/" title="Projects">Projects</a>
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<a href="/about/" title="About">About</a>
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<div id="search"></div>
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<div class="external">
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<a href="https://git.jaseg.de/" title="cgit">cgit</a>
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<a href="https://github.com/jaseg" title="Github">Github</a>
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<a href="https://gitlab.com/neinseg" title="Gitlab">Gitlab</a>
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<a href="https://chaos.social/@jaseg" title="Mastodon">Mastodon</a>
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<header>
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<h1>jaseg.de</h1>
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</header>
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<main class="cards">
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<div class="intro">
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<div class="document">
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<p>Hi there, and welcome to my personal website.</p>
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<p>I'm jaseg, and I write about my projects here. You can find long-form articles in the blog, and links to my open-source
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projects on the projects page. On the top right of this page, there are links to my git repositories and social media
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pages. If you want to learn more about me, head over to the about page.</p>
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</div>
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</div>
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<h2>Recently updated projects</h2>
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<div class="card"><h3><a href="/projects/kimesh/">KiMesh</a></h3>
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<div class="summary">
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<div class="document">
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<p>KiMesh is a KiCad plugin that automatically creates security meshes with two or traces covering an arbitrarily-shaped outline on the board.</p>
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</div>
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<a href="http://jaseg.de/projects/kimesh/">Read more</a>
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</div>
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<div class="links">
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<a href="https://git.jaseg.de/kimesh.git">Sources</a>
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<a href="https://github.com/jaseg/kimesh/issues">Issues</a>
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<a href="https://jaseg.de/projects/kimesh">Docs</a>
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</div>
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</div>
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<div class="card"><h3><a href="/projects/8seg/">8seg</a></h3>
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<div class="summary">
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<div class="document">
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<p>8seg is an experimental textual display. It is made from a 45m by 1.5m large lacework banner that can be put up in a variety of spaces, conforming to the space's size and shape through bending and folding.</p>
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</div>
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<a href="http://jaseg.de/projects/8seg/">Read more</a>
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</div>
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<div class="links">
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<a href="https://git.jaseg.de/8seg.git">Sources and hardware design files</a>
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<a href="https://www.printables.com/model/695260-parametric-flexible-aluminium-profile-case">Enclosure 3D models</a>
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<a href="http://jaseg.de/blog/8seg">Technical overview blog post</a>
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</div>
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</div>
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<div class="pagination-links">
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<a href="/projects/">See more<span class="arrow-right"></span></a>
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</div>
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<h2>Blog</h2>
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<div class="card"><h3><a href="/blog/css-only-code-blocks/">Code listings with nice line wrapping and line numbers from plain CSS</a></h3><strong>2025-07-23</strong>
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<div class="summary">
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<div class="document">
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<p>Code listings in web pages are often a bit of a pain to use. Usually, they don't wrap on small screens. Also, copy-pasting code from a code listing often copies the line numbers along with the code. Finally, many implementations use heavyweight HTML and/or javascript, making them slow to render. For this blog, I wrote a little CSS hack that renders nice, wrapping code blocks with line continuation markers in plain CSS without any JS.</p>
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</div>
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<a href="http://jaseg.de/blog/css-only-code-blocks/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/jupyterlab-notebook-file-oneliner/">Getting the .ipynb Notebook File Location From a Running Jupyter Lab Notebook</a></h3><strong>2025-06-29</strong>
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<div class="summary">
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<div class="document">
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<p>If you need to get the path of the ipynb file in a running #Jupyter notebook, this one-liner will do the trick. It seems chatgpt is confused, and a bunch of other approaches on the web look fragile and/or unnecessarily complex to me.</p>
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</div>
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<a href="http://jaseg.de/blog/jupyterlab-notebook-file-oneliner/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/8seg/">8seg Technical Overview</a></h3><strong>2023-12-26</strong>
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<div class="summary">
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<div class="document">
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<p>8seg is a large-scale LED light art installation that displays text on a 1.5 meter high, 30 meter wide 8-segment display made from cheap LED tape.</p>
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</div>
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<a href="http://jaseg.de/blog/8seg/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/telekom-gpon-sfp/">Ubiquiti EdgeRouter on Deutsche Telekom GPON Fiber</a></h3><strong>2022-02-21</strong>
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<div class="summary">
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<div class="document">
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<p>Short tutorial on getting a Deutsche Telekom GPON internet connection running using a SFP ONU unit in an Ubiquiti EdgeRouter.</p>
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</div>
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<a href="http://jaseg.de/blog/telekom-gpon-sfp/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/ihsm-worlds-first-diy-hsm/">New Paper on Inertial Hardware Security Modules</a></h3><strong>2021-11-23</strong>
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<div class="summary">
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<div class="document">
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<p>Paper announcement: We have published a paper on how you can DIY a tamper-sensing hardware security module from any single-board computer using a moving tamper-sensing mesh made from cheap PCBs.</p>
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</div>
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<a href="http://jaseg.de/blog/ihsm-worlds-first-diy-hsm/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/kicad-mesh-plugin/">Kicad Mesh Plugin</a></h3><strong>2020-08-18</strong>
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<div class="summary">
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<div class="document">
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<p>I wrote a little KiCad plugin that you can use to create security meshes, heaters and other things where you need one or more traces cover the entire surface of a PCB. The plugin supports arbitrary PCB shapes, cutouts, and can route around existing footprints and traces on the PCB.</p>
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</div>
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<a href="http://jaseg.de/blog/kicad-mesh-plugin/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/private-contact-discovery/">Private Contact Discovery</a></h3><strong>2019-06-22</strong>
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<div class="summary">
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<div class="document">
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<p>I gave a short introduction into Private Contact Discovery protocols at our university workgroup.</p>
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</div>
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<a href="http://jaseg.de/blog/private-contact-discovery/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/hsm-basics/">Hardware Security Module Basics</a></h3><strong>2019-05-17</strong>
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<div class="summary">
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<div class="document">
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<p>I gave a short introduction into Hardware Security Modules at our university workgroup, including an overview on interesting research directions.</p>
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</div>
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<a href="http://jaseg.de/blog/hsm-basics/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/serial-protocols/">How to talk to your microcontroller over serial</a></h3><strong>2018-05-19</strong>
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<div class="summary">
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<div class="document">
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<p>Scroll to the end for the <a class="reference internal" href="#conclusion">TL;DR</a>.</p>
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<p>In this article I will give an overview on the protocols spoken on serial ports, highlighting common pitfalls. I will
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summarize some points on how to design a serial protocol that is simple to implement and works reliably even under error
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conditions.</p>
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<p>If you have done low-level microcontroller firmware you will regularly have had to stuff some data up a serial port to
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another microcontroller or to a computer. In the age of USB, an old-school serial port is still the simplest and
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quickest way to get communication to a control computer up and running. Integrating a ten thousand-line USB stack into
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your firmware and writing the necessary low-level drivers on the host side might take days. Poking a few registers to
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set up your UART to talk to an external hardware USB to serial converter is a matter of minutes.</p></div>
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<a href="http://jaseg.de/blog/serial-protocols/">Read more</a>
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</div>
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</div>
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<div class="card"><h3><a href="/blog/thors-hammer/">Thor's Hammer</a></h3><strong>2018-05-03</strong>
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<div class="summary">
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<div class="document">
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<p>In case you were having an inferiority complex because your friends' IBM Model M keyboards are so much louder than the shitty rubber dome freebie you got with your pc... Here's the solution: Thor's Hammer, a simple typing cadence enhancer for PS/2 keyboards.</p>
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</div>
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<a href="http://jaseg.de/blog/thors-hammer/">Read more</a>
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</div>
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</div>
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<div class="pagination-links">
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<a href="/blog/">See more<span class="arrow-right"></span></a>
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</div>
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</main><footer>
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Copyright © 2025 Jan Sebastian Götte
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