W dniu czwartek, 18 stycznia 2018 13:54:32 UTC+1 użytkownik GastonP napisał: > > Another option (just to help troubleshooting but involves no soldering) is > to change the driving sequence to avoid adjacent tubes to be driven one > after the other. For example if you are driving the tubes in 1-2-3-4 > sequence, you can try with 1-3-2-4, which should produce ghosting only > between tubes 2 and 3. >
I think that wouldn't solve the problem. This would just shift the ghosted digits to other tubes. W dniu czwartek, 18 stycznia 2018 19:29:02 UTC+1 użytkownik Frank Bemelman napisał: > > It is not the transistor that keeps conducting or leaking. The voltage you > see at the anode comes from leakage from floating cathodes from the other > tubes. What you can do to kill the ghosting is connecting 10 diodes to all > tube cathodes. Connect the anodes of the 10 diodes to the 10 cathodes of > the tubes. Tie all cathodes from these diodes together, and connect that to > a voltage divider made of 2 resistors of 10k, between your 180v supply and > ground. That should kill any ghosting... > I've tried this method, but with bigger resistors (power dissipation). Unfortunately, it didn't help. I had the pre-bias voltage at 120v with anode voltage 180V. Still I have ghosting present, it seems that it is not a cathode related problem - again narrowing to leaking PNP transistors. W dniu piątek, 19 stycznia 2018 11:31:50 UTC+1 użytkownik Dekatron42 napisał: > > I can recommend reading the Burroughs document N101 on multiplexing Nixies > which can be found here, if you haven't done so already: > http://worldpowersystems.com/ARCHIVE/Burroughs/index.html . > > /Martin > Thanks for the read. The driving method at figure 8 is clever, reducing the number of components on PCB. I think any microcontroller could be used in this configuration. -- 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/d36c61be-2bd8-450e-863a-5dd0e9ae7ffc%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
