I also recommend current-limiting so that you dont get surge-current on cold filaments. I put preheat hardware and software in place; during preheat, all segments get just enough current to make them warm, but not glowing. This reduces the thermal shock when turning them on as well as off.
I dont have enough numitrons to generate any lifetime data, and I dont run those clocks very often...only to gawk at them every few months. Then back to standby. On Friday, May 8, 2026 at 9:02:34 AM UTC-7 newxito wrote: > Good point. I will add the thermal monitoring to the firmware. I will use > the same firmware as for the nixie calculators, I just have to add a > numitron display driver. > The idea is to also reuse the same case, which already has ventilation > slots at the top and bottom. > This is my first numitron project. I'm now designing a 3A 4.5V power > supply that will replace the HV PSU and a new driver board with 8 x > TLC5921. > I'll upload a thermal image once I've finished the project. > -- 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 [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/e0d835ae-a1af-4613-b402-2daa3e249f17n%40googlegroups.com.
