Those chips are great for switching the segments on and off; my trouble is with the (ideally AC) supply for the filament. Others have had success https://kevinr

Those chips are great for switching the segments on and off; my trouble is with the (ideally AC) supply for the filament. Others have had success https://kevinrye.net/index_files/vfd_ac_filament_driver_v11.php https://kevinrye.net/index_files/vfd_ac_filament_driver_v11.... but somehow I have trouble replicating their schematics...