Another beautiful surface finish by my ROBO R1 3D printer...

                                                                   Another beautiful surface finish by my ROBO R1 3D printer...

I don't normally use prototyping wires in final builds, but the modularity of everything was just so good.

I don't normally use prototyping wires in final builds, but the modularity of everything was just so good.

VFD clock has been around in various forms for a few years now, but I think this is the final iteration. Once made from reclaimed VCR displays, this new model of VFD clock uses six IV-22 tubes for a display. The more important guts consist of an Arduino, a DS1307 RTC, and three HV5812 VFD drivers by Supertex, which are basically 30-odd volt tolerant, logic input, 20 bit, serial latched shift registers with push/pull outputs. Also exactly what you want if you're dealing with VFD tubes. You're welcome. The housing is 3-D printed to fit three of my dual IV-22 driver boards.