The new* Precise Nixie Clock published in the May & June 2016 issue of Elektor Magazine combines modern and legacy technologies. Now controlled by a PIC18F4420, the clock receives time signals from the GPS system and displays the time with six Nixie tubes. And this model also shows the seconds.
A tiny neon bulb was added as separator between minutes and seconds digits. The new version has IN-12 nixies, pin compatible with other oval shaped nixie tubes like the ZM1100 and CD56. Since these are top view nixies, we made a separate PCB for the display that can be mounted perpendicular to another PCB containing the rest of the hardware. Six 10-way (box) headers (spaced on a 100mil grid) are used for the connection between the two boards.
If you wish to use other tubes, it is easy to assemble your own display on Veroboard.
A very finely engraved transparent acrylic glass** enclosing with brass tubes and blue back light is now available in the Elektor shop together with the kit containing all the parts.
All your questions about this beautiful project will find their answers here.
* remake of the November 2014 Precise Nixie Clock
** Polymethyl methacrylate (PMMA), aka Plexiglas, Acrylite, Lucite, or Perspex