I’ve made this quick reference guide to help pick the contact materials for your relay. The abbreviations are those used by Finder. Abbreviation Material Benefits Downsides Used for AgNi Silver Nickel Low Cost, popular Everything. Resistive Loads, slightly inductive loads AgNi + Au Silver Nickel + Gold plated Lower contact…
I’ve just started using KiCad, and I’m really impressed. However, setting up a simulation can be awkward, because you need to match up the pin numbers from your schematic (which defines what is connected to what) with the node numbers that you ngspice model has. Most people encounter this first…
I’ve been using SpiderOak for backup, and to cut a long story short it’s becoming tiresome. In fairness, it’s not really meant for backing up servers, but there’s still a lot of things it could do better. So I’m on the hunt for an offsite backup solution for this server….
Sometimes, when you’re updating software on your Linux machine, the person maintaining the package will have also updated the default configuration file that ships with the software. This is an issue if you have customised that configuration file on your system – the system doesn’t know whether it should keep…
Here’s how I got a fully featured Sage Math install on my system. I did this because I wanted to run on windows, and still be able to install packages, which isn’t possible with the precompiled binary. Basic process: Enable hardware assisted virtualization. Set up WSL (Windows Subsystem for Linux)…
I don’t think the documentation for the Real to Int and Int to Real blocks in Unitronics UniLogic is very clear, so here’s my explanation: Real to Int There’s a special case when r2i_Precision_in is 0 (ie. round to the nearest integer): when the magnitude of th fractional part is…
I made this card for my friend, I thought I’d share the pattern in case anyone want to make the same thing. Patterns: this .zip file contains: PDFs, which should be easiest to use, Original SVG files which you can open and edit in Inkscape (which is completely free). (Sorry…
Hello and welcome to my series of posts on setting up a server to run Debian Linux, hosting a WordPress and a Nextcloud installation The idea is to take you through all the steps needed to get up and running, some basic familiarity with computers and Linux is assumed, but…
Now you’re up and running with what should be a stable and secure installation of WordPress and Nextcloud with Collabora. There are plenty more tweaks you can work on yourself: Server Administration Advanced HTTPS – you can check your config with https://www.ssllabs.com/ssltest/. You have choices about how you want to…
There’s lots of ways you could lose your website – a hard drive can fail, the server could be damaged by a lightning strike, or even stolen in a burglary. To get back up and running you’ll need to fix or replace the hardware, but this post is meant to…