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author: jaseg <git@jaseg.de> 2025-06-30 15:40:37 +0200
committer: jaseg <git@jaseg.de> 2025-06-30 15:40:37 +0200
commit: 61c112870d029ad5ec0510b105d157b8ffb86f55 (patch)
tree: 575c4f36b6da08196739ea364e463b4d3a52383b /index.html
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parent: 0d45de162ce253f7c18c4c60d013ab502a3dbb1f (diff)
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+<!DOCTYPE html>
+<html><head>
+	<meta name="generator" content="Hugo 0.147.8">
+    <meta charset="utf-8">
+    <title>Home</title>
+    <meta name="description" content="">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="mobile-web-app-capable" content="yes">
+    <meta name="color-scheme" content="dark light">
+    <link rel="stylesheet" href="/style.css">
+</head>
+<body><nav>
+    <div class="internal">
+        
+        <a href="/" title="Home" class="active">Home</a>
+        <a href="/blog/" title="Blog">Blog</a>
+        <a href="/projects/" title="Projects">Projects</a>
+        <a href="/about/" title="About">About</a>
+    </div>
+    <div class="search">
+        <div id="search"></div>
+    </div>
+    <div class="external">
+        <a href="https://git.jaseg.de/" title="cgit">cgit</a>
+        <a href="https://github.com/jaseg" title="Github">Github</a>
+        <a href="https://gitlab.com/neinseg" title="Gitlab">Gitlab</a>
+        <a href="https://chaos.social/@jaseg" title="Mastodon">Mastodon</a>
+    </span>
+</nav>
+
+    <header>
+        <h1>jaseg.de</h1>
+    </header>
+    <main class="cards">
+        <div class="intro">
+            <div class="document">
+
+
+<p>Hi there, and welcome to my personal website.</p>
+<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
+projects on the projects page. On the top right of this page, there are links to my git repositories and social media
+pages. If you want to learn more about me, head over to the about page.</p>
+</div>
+        </div>
+
+        
+            <h2>Recently updated projects</h2>
+            
+                <div class="card"><h3><a href="/projects/kimesh/">KiMesh</a></h3>
+
+    <div class="summary">
+        <div class="document">
+
+
+<p>KiMesh is a KiCad plugin that automatically creates security meshes with two or traces covering an arbitrarily-shaped outline on the board.</p>
+</div>
+        <a href="http://jaseg.de/projects/kimesh/">Read more</a>
+    </div>
+    <div class="links">
+        <a href="https://git.jaseg.de/kimesh.git">Sources</a>
+        <a href="https://github.com/jaseg/kimesh/issues">Issues</a>
+        <a href="https://jaseg.de/projects/kimesh">Docs</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/projects/8seg/">8seg</a></h3>
+
+    <div class="summary">
+        <div class="document">
+
+
+<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>
+</div>
+        <a href="http://jaseg.de/projects/8seg/">Read more</a>
+    </div>
+    <div class="links">
+        <a href="https://git.jaseg.de/8seg.git">Sources and hardware design files</a>
+        <a href="https://www.printables.com/model/695260-parametric-flexible-aluminium-profile-case">Enclosure 3D models</a>
+        <a href="http://jaseg.de/blog/8seg">Technical overview blog post</a>
+    </div>
+</div>
+
+            
+
+            <div class="pagination-links">
+                
+                <a href="/projects/">See more<span class="arrow-right"></span></a>
+                
+            </div>
+        
+            <h2>Blog</h2>
+            
+                <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>
+
+    <div class="summary">
+        <div class="document">
+
+
+<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>
+</div>
+        <a href="http://jaseg.de/blog/jupyterlab-notebook-file-oneliner/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/8seg/">8seg Technical Overview</a></h3><strong>2023-12-26</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<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>
+</div>
+        <a href="http://jaseg.de/blog/8seg/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/telekom-gpon-sfp/">Ubiquiti EdgeRouter on Deutsche Telekom GPON Fiber</a></h3><strong>2022-02-21</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<p>Short tutorial on getting a Deutsche Telekom GPON internet connection running using a SFP ONU unit in an Ubiquiti EdgeRouter.</p>
+</div>
+        <a href="http://jaseg.de/blog/telekom-gpon-sfp/">Read more</a>
+    </div>
+</div>
+
+            
+                <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>
+
+    <div class="summary">
+        <div class="document">
+
+
+<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>
+</div>
+        <a href="http://jaseg.de/blog/ihsm-worlds-first-diy-hsm/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/kicad-mesh-plugin/">Kicad Mesh Plugin</a></h3><strong>2020-08-18</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<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>
+</div>
+        <a href="http://jaseg.de/blog/kicad-mesh-plugin/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/private-contact-discovery/">Private Contact Discovery</a></h3><strong>2019-06-22</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<p>I gave a short introduction into Private Contact Discovery protocols at our university workgroup.</p>
+</div>
+        <a href="http://jaseg.de/blog/private-contact-discovery/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/hsm-basics/">Hardware Security Module Basics</a></h3><strong>2019-05-17</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<p>I gave a short introduction into Hardware Security Modules at our university workgroup, including an overview on interesting research directions.</p>
+</div>
+        <a href="http://jaseg.de/blog/hsm-basics/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/serial-protocols/">How to talk to your microcontroller over serial</a></h3><strong>2018-05-19</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<p>Scroll to the end for the <a class="reference internal" href="#conclusion">TL;DR</a>.</p>
+<p>In this article I will give an overview on the protocols spoken on serial ports, highlighting common pitfalls. I will
+summarize some points on how to design a serial protocol that is simple to implement and works reliably even under error
+conditions.</p>
+<p>If you have done low-level microcontroller firmware you will regularly have had to stuff some data up a serial port to
+another microcontroller or to a computer. In the age of USB, an old-school serial port is still the simplest and
+quickest way to get communication to a control computer up and running. Integrating a ten thousand-line USB stack into
+your firmware and writing the necessary low-level drivers on the host side might take days. Poking a few registers to
+set up your UART to talk to an external hardware USB to serial converter is a matter of minutes.</p></div>
+        <a href="http://jaseg.de/blog/serial-protocols/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/thors-hammer/">Thor&#39;s Hammer</a></h3><strong>2018-05-03</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<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 <a class="reference external" href="https://en.wikipedia.org/wiki/PS/2_port">PS/2</a> keyboards.</p>
+<figure data-pagefind-ignore>
+    <video controls loop>
+        <source src="video/thors_hammer.mov" type="video/h264">
+        <source src="video/thors_hammer.webm" type="video/webm">
+        Your browser does not support the HTML5 video tag.
+    </video>
+    <figcaption>A demonstration of the completed project.
+
+        <a href="video/thors_hammer.mov">h264 download</a> /
+        <a href="video/thors_hammer.webm">webm download</a>
+    </figcaption>
+</figure><p>The connects to the keyboard's PS/2 clock line and briefly actuates a large solenoid on each key press. An interesting
+fact about PS/2 is that the clock line is only active as long as either the host computer or the input device actually
+want to send data. In case of a keyboard that's the case when a key is pressed or when the host changes the keyboard's
+LED state, otherwise the clock line is silent. We ignore the LED activity for now as it's generally coupled to key
+presses. By just triggering an NE555 configured as astable flipflop we can stretch each train of clock pulses to a
+pulse a few tens of milliseconds long that is enough to actuate the solenoid.</p></div>
+        <a href="http://jaseg.de/blog/thors-hammer/">Read more</a>
+    </div>
+</div>
+
+            
+                <div class="card"><h3><a href="/blog/multichannel-led-driver/">32-Channel LED tape driver</a></h3><strong>2018-05-02</strong>
+
+    <div class="summary">
+        <div class="document">
+
+
+<p>Together, a friend and I outfitted the small staircase at Berlin's Chaos Computer Club with nice, shiny RGB-WW LED tape for ambient lighting. For this installation, I made a 32-channel LED driver that achieves high dynamic range on all 32 channels using a cheap microcontroller by using Binary Code Modulation.</p>
+</div>
+        <a href="http://jaseg.de/blog/multichannel-led-driver/">Read more</a>
+    </div>
+</div>
+
+            
+
+            <div class="pagination-links">
+                
+                <a href="/blog/">See more<span class="arrow-right"></span></a>
+                
+            </div>
+        
+    </main><footer>
+    Copyright © 2025 Jan Sebastian Götte
+    / <a href="/about/">About</a>
+    / <a href="/imprint/">Imprint</a>
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author	jaseg <git@jaseg.de>	2025-06-30 15:40:37 +0200
committer	jaseg <git@jaseg.de>	2025-06-30 15:40:37 +0200
commit	61c112870d029ad5ec0510b105d157b8ffb86f55 (patch)
tree	575c4f36b6da08196739ea364e463b4d3a52383b /index.html
parent	322eddf574e8b5bd01f0b5ce553bafa6ce10a774 (diff)
parent	0d45de162ce253f7c18c4c60d013ab502a3dbb1f (diff)
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