Julien Coyne invented a digital sundial. Sundials usually cast a line or triangle to indicate the hour. This one is designed so that when light passes through, it displays the shapes of numbers.

To display the time he used one of those QDSP-6064 bubble displays, because sundials are retro. His description of the project build includes a lot of fun anecdotes, like him attempting to solder ...

IN these days of accurate clocks and watches no one thinks of using a sun dial to tell the time of day. At best such an instrument can be right but four times a year, and in many places it can ...