Richard, A million years ago, I designed a multiplexed Nixie clock using a 74141 cathode driver and two transistors per anode. It worked well. Here's the user manual, with the schematic at the end. http://www.cathodecorner.com/nc620akitman.pdf The only caveat is that capacitance in the Nixie tube wiring will cause ghosting which is dealt with by adding a time delay between turning off the cathode select and anode select, then turning on the next anode. I didn't need any pull-mid resistors or other complications. You can replace the 74141 with a couple SN75468 100V transistor arrays for the cathode drivers.
On Wed, May 19, 2021, 9:21 PM Richard Scales <rich...@scalesweb.co.uk> wrote: > I am trying to learn about multiplexed displays (I thought it was about > time I had a go at this) and I believe that I understand the basics - in > as much as it requires the switching of the required anode as well as the > required cathode (all of which are wired in parallel). > > I understand that I can use something as simple as a single transistor for > the cathode (low side) and a couple of transistors for the anode (high > side). > > Again, for the low side driver I could use any of the 'standard' shift > register type drivers that we use in clocks such as an HV5622 (I appreciate > that's way too many bits and I'm sure that there will be a smaller > equivalent part available. > > Specifically - is there such a part that I could use for the high side, ie > switching the HV to the relevant anode? > > I know that I could use a simple shift register (74595 for example) plus > the transistors for a high side switch, I just wonder if there is a part > which does all that in one package? > > All pointers gleefully received. > > - Richard > > > -- > 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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/4e7d26e7-a9ff-463d-9493-794d8dab4943n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/4e7d26e7-a9ff-463d-9493-794d8dab4943n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAPbqtvfQ0z53RfsrOxa%2BwxBqPh9_tXmanzw9DwaYa6DFtLpNHQ%40mail.gmail.com.
