Random

"Having unpredictable outcomes and, in the ideal case, all outcomes equally probable."

This is random posts, anything that I want to share with the world and which don't fit into the other categories. It can be anything from pre-experiment tests to one-off ideas that I probably won't do more work on.

We have a cage for rabbits that we has small plastic hasps that somehow have a tendency to disappear. So on request from my wife I created a handful new ones. Original (white) vs. 3d-printed (green) After a couple of minutes in Fusion360, and 15 minutes in the printer we had a result, and it worked as well, if not better, than the original. Fusion [...]

While trying to get face recognition with Compreface working together with a Nvidia graphics card I got the error: Attempting to run nvidia-container-runtime returns nvidia-container-cli.ldconfig value /usr/sbin/ldconfig is not host-relative (does not start with a '@') error Easy solved by running the following command as root nvidia-ctk config [...]

I have a handful of cheap ESP32 development boards, and some expensive, that all sometimes gives me the error A fatal error occurred: Could not open COM6, the port doesn't exist. But I have found a workaround. The simplest way I found is to start with opening the Serial Monitor (in Arduino IDE) to see the status of the com-port easily. Then unplug [...]

My home server runs Truenas Core, a natural choice since I've been partial towards BSD since I accidentally overwrote my main disk with OpenBSD back in the 90s. To get some ease of mind I want to back up photos and other important files and CrashPlan is (was when I looked last time) the only cloud backup service that ran on Linux and mounted disks [...]

For quite a while I have been annoyed that I didn't have a phone stand for my phone that would charge it wireless. But then I remembered that I had an old wireless charger that I didn't use any more. The evolution of the stand The first crude version had a design flaw, I had not accounted for the precise positioning needed for the wireless charger [...]

I have a water radiator on my top floor mounted in a small niche, so small that there is only about 1cm of space between the air-valve and the wall. The problem has been that I since I moved here 10 years ago have been looking for something that would fit so I could air out the radiator. But it seems like the closest I found was some image of one. [...]

I have a Raspberry PI in the boot of my car, and it can get quite warm during the summer months, so it needed some cooling. The problem is that it features a PiJuice, to be able to handle the power being cut as soon as the car is turned off. But I couldn't find any cases that had place for both a fan and pijuice, even if i Googled for at least 30s. [...]

I have a handful servers where I login regularly and started to created separate ssh-keys for each client-server pair instead of the standard practice of just one ssh-key per client. The basic idea If you only have one ssh-key and it get accidentally (or intentionally by your nemesis) it's quite a chore to hunt down all the places where you used that [...]

This summer me and some of my friends continued the tradition of over 20 years now to go to Netherlands and visit the hacker festival known under new name each event. This iteration was called May Contain Hackers or MCH2022. This was the first time we didn't sleep in a tent on the campgrounds but instead lived in the lovely hotel across the canal and [...]

While designing my own PCB I created some prototypes. To test my designs and the capabilities of JLCPCB. I wanted to test the newly created footprints, colours and silk-screen prints among other things. So here are a small gallery of those prototypes. The first, mainly footprint test The 2nd & 3rd, more footprints The 4th, different sized holes [...]

Random

Cage hasp

Nvidia in Docker, no @ for ldconfig

Arduino – The port doesn’t exist

Running CrashPlan on Truenas Core

Quick and dirty phone stand

Elementnyckel

Raspberry PI case with a fan

Per client/host ssh-keys

MCH2022 and CTF

Keyboard PCB prototypes