Hi, I have some experience building multiplexed Nixie clocks that work correctly. Firstly, do you have an oscilloscope? It's difficult to understand what is going on without one.
I found that 190V was sufficient to run ZM1040 tubes with a 10k anode resistor shared by all tubes. I would have to measure it again to know the current and anode voltage, because it's been about fifteen years since I last made one. Ghosting is a problem unless you time the anode and cathode switching properly. I turned off the anode, waited a few milliseconds for the tube to turn off, changed the cathode selection, waited a few milliseconds, then turned on the next anode. I also used PC board cathode wiring instead of discrete wires, to reduce capacitance. I remember that the anode current was 5 mA, and the anode voltage was 140V, but I could be off. On Thu, Jan 31, 2019, 4:46 PM David Pye <[email protected] wrote: > Still testing,and indeed, finding gremlins :-/ > > Even the copy of Elektronische Anzeigebauelemente Electronica 171 has a > gremlin in it, being largely misprinted with huge sections missing, > including conveniently, the section on pulsed nixie operation. > > On a slightly different note, when anode-multiplexing, I can't see why one > anode resistor doesn't suffice, as only one tube is ever on at once. > > I was pondering this kind of layout: > > > HV supply->Anode resistor->Multiplex drive circuitry->TUBES > > Any reason why that would be ill-advised? > > David > > On Fri, 25 Jan 2019 at 20:53, gregebert <[email protected]> wrote: > >> Make sure you test the DCDC converter under full-load. Every one of these >> I've ever designed & built always worked beautifully under low load, and as >> the load increases all sorts of gremlins start creeping out of the jungle. >> >> Some of them are easy to spot, like overheating. Others require you to go >> poking around with a scope to find excess voltage or current. >> >> -- >> 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/11d50a9e-1533-450d-b34b-7d0c63aabe6b%40googlegroups.com >> <https://groups.google.com/d/msgid/neonixie-l/11d50a9e-1533-450d-b34b-7d0c63aabe6b%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 email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CAOQ6x0ErixCXr_SD2-6DNX_1kiGx2Dwd7KbaAh6BdptNXiXDUQ%40mail.gmail.com > <https://groups.google.com/d/msgid/neonixie-l/CAOQ6x0ErixCXr_SD2-6DNX_1kiGx2Dwd7KbaAh6BdptNXiXDUQ%40mail.gmail.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/CAPbqtvcqdakNW30G6DK%3DkTnM8EDPbUc2R%3Du77eUUbHr9zx9SnQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
