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 <celephi...@gmail.com> On Thu, 6 May 2021 at 01:21, gregebert <gregeb...@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+unsubscr...@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+unsubscr...@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.
