Many thanks to SWLing Post reader, Stan (WA1LOU), who writes:
“Enjoy your blog. I have been reading it for years. [H]ere is something your readers might be interested in that I mentioned in my blog today:
Very cool! Goes to show that there are a countless number of applications for the Arduino system to be used with amateur and shortwave radio.
John Ackermann also produced this informative presentation/video about the system: