One of [Bob’s] most treasured possessions is a Heathkit alarm clock he put together as a kid. Over the years he’s noticed a few problems with his clock. There isn’t a battery backup, so it resets when ...

Howard Constantine has created a seventh Nixie Clock kit which is now equipped with a GPS module and come supplied with new firmware as well as plenty of improvements and enhancements to the PC board.

As sailors in the 17th century learned the hard way, having an accurate clock for navigation is pointless if it is too delicate to carry aboard ship. The same goes for the super accurate optical ...