Simonclock
Simon writes in about his SV Chronometer – a GPS based, interactive master clock

This is a little blog post about a device I built to provide me with an accurate time reference I can use to synchronise all the timepieces in my house. It used a GPS module and a PIC 16F628 microcontroller with a small two line LCD screen to display the time (UTC and local). Everything is housed in a art deco style casing with eye pieces to peer into the inner workings of the device. A crank handle on the side must be turned to cause the display to light up in a flickering manner similar to and old mutoscope machine.