The build relies on a 20×2 character VFD display that looks great ... board compatible with the typical HD44780 command set. On Arduino platforms, this means the display can easily be driven ...

There’s no shortage of clock projects, but [niq_ro] has his own take using a vacuum fluorescent display (VFD), and Arduino, and a pair of MAX6921 ICs. Those chips are made to drive a VFD ...