Instead of the CD4511, have you considered multiplexing ? It should work very well for incandescent displays because of their inherent storage time and you wont have any visible flicker. And best of all, no ghosting !!
You can also add PWM to keep the dark segments warm, which should help extend their lifetime. My father used to design aircraft instruments, and it was common practice (until LEDs came along) for incandescent bulbs in lighted switches to be kept always-on, either bright or dim. Those bulbs were rated for 100,000 hours of operation. You'd be amazed how much heat was generated in the cockpit of a 747. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to email@example.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/8f40cc44-23e1-418c-a519-a38b47cb0101%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.