Hello! Welcome to another Other Machine project tutorial! I'm SamThe Nerd Watch displays the time in binary when the button is pushed. The watch shows the hour and minutes by flashing two LEDs in sequence to represent two 4-bit binary numbers (in big-endian format). Here's a great description of how to read binary numbers.
In this Instructable, I'll show you how to build a Nerd Watch from scratch with a few electronics components, and an OMC Othermill.