*you can also look at this materialguy works with IGT1-203*
*https://dotdisplay.blogspot.com/2017/08/igt1-203-self-scan-bar-graph-display.html <https://dotdisplay.blogspot.com/2017/08/igt1-203-self-scan-bar-graph-display.html>* вторник, 17 июня 2025 г. в 07:39:41 UTC+3, Richard Scales: > Thank you so much - that is amazingly helpful - the mist has cleared - so > in some small way it's a bit like driving a decatron! I have some code > which I am trying to follow but - not knowing how the thing actually worked > - it was not totally clear to me - now I understand a little more - I'm > more confident of achieving something - the display I want to use has 5 > phases and the code I am looking at suggests that is possible. > Thank you very much indeed. > > - Richard > > > On Monday, 16 June 2025 at 06:15:35 UTC+1 Tristan wrote: > >> These appear to based on the same glow transfer principle as the >> Burroughs self-scan displays (almost like one fell out of the back of an >> SR71 that happened to be passing over the USSR). So information of driving >> those should be relevant the "auxiliary" anode/cathode is called >> "keep-alive". The number of phases can vary but the underlying method >> should remain the same where the "cathode groups" are sequentially pulled >> to ground to transfer the glow along the display. >> >> https://lampes-et-tubes.info/cd/Bar_Graph_Display_for_Instruments.pdf >> >> The key part is that only one segment is lit at a time and >> persistence-of-vision makes is appear as a solid bar. Conceptually in terms >> of program flow, in the Burroughs example you update the display 70 times >> per second. That means you for a 100 segment display you reset the display >> and advance the scanning cathode each ~143uS ((1/70)/100) once you've >> advanced the scan to the number of bar segments that are intended to be lit >> you turn off the anode until the next 14.3mS frame time. At the end of the >> frame you reset the display (turn on the main anode and initiate the glow >> with the reset cathode) and start scanning again. >> >> Regards, Tristan >> >> >> On Monday, June 16, 2025 at 1:00:59 PM UTC+10 Richard Scales wrote: >> >>> Hello, >>> >>> I am looking at some 'panaplex' style bar graph displays with the >>> objective of using them as a 'seconds' indicator. >>> >>> [image: Bar1.jpg] >>> Is there anyone in the group that give me a brief explanation as to >>> exactly how these bargraph displays 'work'? >>> >>> [image: bar2.jpg] >>> >>> I have looked at a post with some details here: >>> https://stromrichter.org/showthread.php?tid=3993&page=8 >>> >>> There is a schematic and some code. >>> >>> It looks like there are 5 'scanning cathodes' , a reset cathode, an >>> auxiliary cathode, Anode and Auxiliary Anode connections. >>> >>> I have stared at the code for some time and am gaining an understanding >>> of the required program flow but am seeking a more basic understanding of >>> how the tubes work, how the 5 'scanning cathodes' need to be driven etc. >>> >>> All pointers gleefully received - thank you. >>> >>> Kind regards >>> >>> 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 [email protected]. To view this discussion, visit https://groups.google.com/d/msgid/neonixie-l/5ddbdb9c-0325-48a5-a001-d2a252a872c7n%40googlegroups.com.
