Yes, that's it. If the other segments are high, they just work as more anodes.
The best thing imho is just to leave them floating, but they will then float up to the anode voltage. So provided you have drive circuitry that can switch the full anode voltage, that is ok. If your drive circuitry cannot handle the full anode voltage, you need to either keep at least one cathode on at all times (ie not use cathode blanking) or have a pull down resistor that holds them at say, 70v so they don't glow, and use the drive circuitry to put them from that holding voltage to ground. David On Sun, 3 Mar 2019, 10:03 Jasper C., <[email protected]> wrote: > I'm still new when it comes to nixie tubes, and was reading this page > <http://www.decodesystems.com/re-how-nixies-work.html>, in particular the > "partial glow" that occurs if the prebias voltage of an "off" cathode is > too low. Wouldn't that imply that the ideal solution would be to pull the > cathodes to the supply voltage of the anode when their respective segment > is off? > > Only in this EEVblog video, starting at 14:25 > <https://youtu.be/hkbPJONJLfs?t=865>, he does just that and it doesn't go > well. I get that the anode voltage here is lower than the HV supply > because of the 22k resistor, though I don't understand why that then has > the effect that it does. Is the segment shorted to HV acting as an anode? > (Which might explain the higher current he's seeing.) > > Would a totem pole circuit like that work if the anode resistor was > removed and each cathode connected to the totem pole output by it's own > resistor? > > -- > 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 email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/144bce53-142d-44be-9a9b-fae08fafab7b%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/144bce53-142d-44be-9a9b-fae08fafab7b%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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/CAOQ6x0G9yc34nETMzQENzAZDOQv1_KoEeJ5j%2Bx3ZQrDeG0odoA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
