On the surface QCAD and LibreCAD and every other 2D CAD software is the same, offering the same basic tools, user interface, and supported file formats. The small differences will either have you praising the software developers or cursing them as you spend your precious time fiddling with the quirks. In 2011 LibreCAD was forked from QCAD version 2. In the software development community, forking is the process of duplicating a project and having it be developed by a different group of engineers.
For non-professionals, it’s difficult to warrant paying thousands of dollars on CAD software. Free CAD software is available and many times will work fine in lieu of paid software. Below is a list of 2D and 3D CAD programs that you can use for free. Some of the options below are free versions of paid software. In many of the cases, the free versions offer great functionality and many of the same tools, but may limit you from using the software commercially.
Even with a markup language as simple as Markdown, it is nice to have an editor that complements the language. I use Markdown frequently to write posts on my websites along with writing documentation when developing software. I’ve used many of these following editors and I am sure we will have a different opinion on which one is the best. I’ve also tried many other editors that I couldn’t care enough about to even mention here.
Keeping your MySQL server backup as current as possible is important. I’ve seen (and have done this myself) people backup using mysqldump once a day, week, or month without any backups in-between. There are a few problems with backing up your database this way. The first problem is that running mysqldump is very slow on large databases and could lockup your website for a significant portion of time. Secondly, you can lose all data that occurred since the previous backup.
This post is going to cover how to take a USB device and write software that can interact with the device without having publicly available documentation. I came about writing this post when I found an old AverMedia RECental USB button in a box of electronics. I wanted to repurpose the button and this is the result of that process. The device used while writing this tutorial was a very simple in that it only sent two different interrupts (pressed / released) along with a method to create LED animations.