The Best Casio Mod

There&rsquo;s a cool project in the classic Casio space that I&rsquo;ve wanted to check out for a while called Sensor Watch . The project is headed up by Joey Castillo, and aims to add more modern functionality to the Casio F-91W. The latest revision, Sensor Watch Pro, just started shippping a few weeks ago &ndash; so I bought one. So what is it? Sensor Watch is a drop-in board replacement for the…