This simple electronic load for testing power supply circuits was a popular lab-built piece of test gear at Maxim Integrated Products. It was known as the “Larry Load” by the lab rats at Maxim because it was designed by an applications engineer named Larry Carr. Commercial electronic loads were available from companies like Kikusui, but those were not cheap (and Maxim famously *was* back then) and Larry Loads were unique in their simplicity, wide range, and every-day utility. Even today, I’m unsure if a commercial load instrument can dial in a load of 10uA. After retiring from Maxim. I had always intended to build a few of these for home lab use. I finally got around to it.