I'm looking into using a set of IN-12B Nixie tubes in a clock design I've been working on.
If I tie my anode to the 170V striking voltage and use ~16kOhm to limit the digit current to 2.5mA then we're fine. However, I don't know how I am supposed to achieve the 0.3mA current limit for the comma cathode.
I'd like to think that I can just add another resistor in series with my cathode in order to meet the current spec but I've been having trouble finding any examples of people using the IN-12B without ignoring the comma cathode entirely.
What is the right way to go about this?