[Alex] ramped up the precision of his timepiece by adding a ChronoDot to the Ice Tube Clock. These two items are among our favorites; the Ice Tube Clock for its old-style multi-digit display, and the ChronoDot for combining a DS3231, battery, and components into a nice small package. There is a schematic link at the very bottom left of [Alex's] writeup. He mentions that he depopulated the clock … [Read more...]