splitbrain.org

electronic brain surgery since 2001

Welcome

Hi, I'm Andreas Gohr and splitbrain.org is my website. I'm a web developer and maker living in Berlin, Germany. If you're new here, feel free to check out the blog posts and links below.

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Password Hasher PWA Nearly two decades ago I wrote about a mechanism to have different passwords for every web site, without a central password manager storing your passwords. All you needed is an algorithm and a master password. I am still using the mechanism. But the original Firefox extension is abandoned, the Chrome extension that replaced it no longer works with recent Chrome changes and the Android App I was using is no longer working either.…

Twenty Years… …of GitHub commits. And it seems this year, I beat the highscore from 2016 😲! Image made with GitHub Contributions Chart Generator…

Wireless Gaming Headsets In the last years I always used a wired headset, because I didn't like the idea of having to recharge it and I am not moving away from my desk anyway. I am using a wired mouse and keyboard for the same reason. However there are two things that break on headsets. First, the faux leather disintegrates…

My first NixOS Upgrade NixOS 25.11 was released recently. So it was time to see how easy an upgrade for my NAS would be. There are official upgrade instructions but I also found this reddit comment which gave a bit more advice. So here is what I did. First I updated the channel: # nix-channel --list nixos https://nixos.org/channels/nixos-25.05 # nix-channel --add https://nixos.org/channels/nixos-25.11 nixos # nix-channel --list nixos https://nixos.org/channels/nixos-25.11 # nix-channel --up……

Cosytober 2025 CosyTober is a “cosy alternative to #Inktober”. The idea is the same, all during October, each day a prompt is given and artists are asked to draw, paint or otherwise create something inspired by the prompt and post it to social media. I'm not great at drawing but it sounded fun and I wanted to see how my new…

Viwoods AI Paper Review I have been a user of the original Remarkable Tablet (RM1) for more than 8 years now. I use it nearly daily, to take notes during my day job as well as for private projects. So when Viwoods asked if I'd be interested in testing their approach on a E-Ink note taking device, I was very interested.…

Horse Kaddi wanted to build something for her little niece again. Last time it was a unicorn, this time it was a horse. I helped a little with the woodworking parts, but again most of the design and work was done by her. The main body was created from 22mm plywood and left over spruce boards which we cut into thinner strips and milled down to proper thickness. A roundover bit made everything child safe.…