July, 2022: Decided stop providing download links for the desktop version of the Lab, which I am no longer supporting. Also learning how to put this web site onto the ArWeave blockchain “permaweb.” See about the permaweb at (opens in new tab}

June, 2022: Changed the site theme.

November, 2021: Added three blog posts to report the number of downloads from the Resources section and the number of runs of Web Labs.

October, 2021: Divided up the single Web Labs page into topics pages. Added Web Lab 1A, water level control with two tanks in series.

Rich Herz

Rich, 2014

See more Now pages at