This site is a public home for some personal projects of a retired electrical engineer.   It is an attempt to document things I find interesting, or that puzzle me,  or that I am just curious about.

Most of the entries are  circuit simulations using uSimmics by Michael Margraf, DD6UM,  freely available here  .  uSimmics was called QucsStudio in earlier releases.

The presentation slide on this site were created in MicroSoft PowerPoint, but saved as Google Slides.  To view the slides, move your mouse to hover over the upper right corner of the first slide and click on the icon that appears.  The presentation will open in a new browser window.