Show HN: Carton Clock — A Working Pendulum Clock Built from Empty Drink Cartons

A maker built "Carton Clock," a working pendulum clock made from empty drink cartons plus BBQ skewers, paper straws, string and metal nuts as weights, all held together with hot glue. The gear train displays seconds, minutes and hours, and a full wind runs for a little over an hour. A custom browser tool, "Cartontick," written with Claude, simulated the carton escapement and generated cutting stencils and 3D-printable gluing jigs.