Gregebert you are quite correct about the probable connection and the voltage spread, it would only work within the same batch, I built a 3x3 and it was tricky as hell to get working. I'm told there were Soviet era neon lamps with a wider voltage spread that would be easier.
Maybe this guy: https://hackaday.com/2020/07/23/384-neon-bulbs-become-attractive-display/ knew about the issues! Tom Harris <celephi...@gmail.com> On Thu, 6 May 2021 at 08:40, gregebert <gregeb...@hotmail.com> wrote: > So if the display was static, using only pulses to turn bulbs on or off, > then it was most likely all bulbs were resistively tied to a sustaining > voltage, say 70 volts. > If individual rows were sequentially pulsed higher, say +85V while columns > were pulsed slightly negative, then those targeted bulbs would turn on. It > would be very tricky because the ionization and sustaining voltages will > change over time and vary across manufacturing lots. > > On Wednesday, May 5, 2021 at 1:49:44 PM UTC-7 Jon D. wrote: > >> Copy that... >> >> On Wed, May 5, 2021 at 2:42 PM Tidak Ada <off...@zeelandnet.nl> wrote: >> >>> Oops, a typo.It is ZM1215 of course as the file name says. >>> eric >>> Verstuurd vanaf mijn iPhone >>> >>> Op 5 mei 2021 om 22:36 heeft Jon Jackson <jond...@gmail.com> het >>> volgende geschreven: >>> >>> >>> is this a ZM1251 or ZM1215 ?? You have conflicting info... >>> >>> On Wed, May 5, 2021 at 2:29 PM Tom Harris <celep...@gmail.com> wrote: >>> >>>> Thanks for the ideas but it was definitely static with the pulses just >>>> used to turn the lamps on or off. After that they would keep their state >>>> indefinitely. >>>> >>>> Tom Harris <celep...@gmail.com> >>>> >>>> >>>> On Thu, 6 May 2021 at 01:21, gregebert <greg...@hotmail.com> wrote: >>>> >>>>> If it was pulsed-DC, then it probably was simple multiplexing. >>>>> >>>>> I have thought about doing it with AC, which makes the driver more >>>>> complex, but it will make the bulbs last longer since both electrodes will >>>>> be illuminated (alternately, of course). Not sinusoidal AC, but >>>>> square-waves. If you do the math, a typical neon bulb is "on" for about >>>>> 2/3 >>>>> of an AC cycle (on at 90V, off at 60V) so that would be my starting point >>>>> for multiplexing. I was thinking a 7 x 9 matrix, using 2:1 multiplexing. >>>>> It's more driving circuitry but it might be possible with an HV-series >>>>> device that can drive high and low. >>>>> >>>>> On Wednesday, May 5, 2021 at 5:46:13 AM UTC-7 celephicus wrote: >>>>> >>>>>> Can someone please help me out, I remember an article from some >>>>>> scanned book from the 60s where a set of neon lamps were connected in a >>>>>> matrix with clever biasing and pulses on the row & column could toggle an >>>>>> individual lamp. I thought it was the GE glow lamp manual but it seems >>>>>> not. >>>>>> >>>>> -- >>>>> 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+...@googlegroups.com. >>>>> To view this discussion on the web, visit >>>>> https://groups.google.com/d/msgid/neonixie-l/3fbf8723-0461-443e-8b97-e4c97e1417can%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/neonixie-l/3fbf8723-0461-443e-8b97-e4c97e1417can%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+...@googlegroups.com. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/CAHjG12SsjFL%3DKVx8OAnCBBHfi__-MAQUh5EyfRKkU88q%3DDBcVg%40mail.gmail.com >>>> <https://groups.google.com/d/msgid/neonixie-l/CAHjG12SsjFL%3DKVx8OAnCBBHfi__-MAQUh5EyfRKkU88q%3DDBcVg%40mail.gmail.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+...@googlegroups.com. >>> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/CAC%3DcyqduE0otsTquZszcQrpZaPL0YZX8THTwXQMSXpax13jHQg%40mail.gmail.com >>> <https://groups.google.com/d/msgid/neonixie-l/CAC%3DcyqduE0otsTquZszcQrpZaPL0YZX8THTwXQMSXpax13jHQg%40mail.gmail.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+...@googlegroups.com. >>> >> To view this discussion on the web, visit >>> https://groups.google.com/d/msgid/neonixie-l/92014AA2-E884-4AEE-A94D-B2353FAC88F5%40zeelandnet.nl >>> <https://groups.google.com/d/msgid/neonixie-l/92014AA2-E884-4AEE-A94D-B2353FAC88F5%40zeelandnet.nl?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/822bbdd2-de8f-429f-98f1-12f9a13f4926n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/822bbdd2-de8f-429f-98f1-12f9a13f4926n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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