Thanks all for the wonderful input and confirming cathode current limiters is a valid replacement for passive anode current limiting, even though the latter is far more common. Despite the active cathode current limiters requiring more parts and cost, the benefits are worth it for the projects I have in mind.
Side note, good looking Sperry SP-151 display you have there Robert L. The rectangluar neon segment displays always looked awesome to me. Additionally, good call on the pull-down resistor, that was indeed an extra part added to make sure the simulation worked correctly. In reality 595 outputs will a controlled high or low and never set to the High-Z state. Hence pull-down not needed in reality as pointed out. To give some added background, I want to add IN-12 or other common Nixie tubes to devices that already have high voltage supplies. In practice if some vintage hardware is already rectifying grid power to create high voltage DC source generally 25mA can be siphoned off for a Nixie display and not affect the vintage device. Of course exact implementation will assessed on a case by case bases for best results. Thanks again for the input everyone, Allen -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/81b5e969-5f39-4cc8-8f39-c8c9350a6fca%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
