Building and Testing a USB to DMX interface

There are quite a few ways to get or make a USB to DMX (RS-485) interface. In this video I "kluge" together a simple interface and use it to test the lightbar I fixed in a previous video. I also give a quick overview of some free DMX software you can run on your computer. See the links below for more info on DMX and QLC+ software.
DMX512:
https://en.wikipedia.org/wiki/DMX512
QLC+ Software:
https://www.qlcplus.org/
https://www.youtube.com/watch?v=jcoPwT4RnL0
QLC+ Fixture Editor:
https://www.qlcplus.org/docs/html_en_EN/fixturedefinitioneditor.html
https://www.youtube.com/watch?v=ANKZAngAqWE&t=3s