You can buy all kinds of conventional clocks that have hands and numbers for easy reading. Or, like [Fabio Ricci], you could build yourself something a little more esoteric, like this neat shadow ...

This is a library for the Si5351A (10 MSOP - 3 Clocks Only) series of clock generator ICs from Skyworks Solutions for the Arduino development environment. It will allow you to control the Si5351 with ...