From the manufacturing world, from the coding world, and sometimes both. Here are some things I’ve made.
This is one of the first projects I completed right after learning to use BASH, AWK and other GNU coreutils. It is a very basic linter type of program for CNC machine code. It is tailored for the specific wireless DNC system I use a Chesterton, so it may or may not be useful for anyone else. This was mostly just an exercise in creating a program. I got some help with the AWK part from a friend and former Linux system administrator.
When I was learning to use SolidWorks, I went looking around the web for plans to build small machines. The idea was to use the plans to practice 3D modeling with SolidWorks. I found plans for this neat little Stirling engine at machinistblog.com. The designer is a man named Joren Jonkman. He has a YouTube channel with videos of many of the little engines he’s apparently made. I modeled all the parts, then assembled them in SolidWorks and even did some motion and stress studies on it.