The above may look like a Nixie tube, but it’s a Numitron: the Nixie’s lower-voltage friend, and part of [pinomelean’s] single-digit Numitron clock. If you’re unfamiliar with Numitrons ...

[Andres] went a different direction, using a PIC microcontroller and eventually incorporating his circuit into the body of the controller. The prototype circuit can be seen above. [Andres] uses a ...