Pi-based Spectrometer Gets An Upgrade

Here at Hackaday, we love to see projects re-visited and updated after we’ve covered them on the site. It’s always exciting to see what the

A Homebrew AC Upgrade For The Fluke 8840A

[William Dudley] picked up a Fluke 8840A bench multimeter at an auction, but was sad to find out that it was reading resistances inaccurately. It