I am multiplexing anodes one by one, from left to right. Frequency is around 40Hz per lamp. czwartek, 7 stycznia 2021 o 19:27:05 UTC+1 Mateusz Dziuba napisał(a):
> I did not develop specific circuit diagram for my clock, but it is build > around this project: (please don't mind wrong polarity of opto. Someone > draw it wrong.) > [image: e44b2492e18895184e259a89f71556fc.jpg] > czwartek, 7 stycznia 2021 o 18:32:35 UTC+1 Bill van Dijk napisał(a): > >> Can you post the schematic? First I notice that a bright 1 has a ghost 2, >> and it seems every number has a ghosted lower number. Could be timing >> (discussed many times), or perhaps the KD1551s are too slow depending on >> your multiplex speed. What is you multiplex sequence, i.e. 2x3, 3x2, 1x6 ? >> >> >> >> Bill >> >> >> >> *From:* neoni...@googlegroups.com [mailto:neoni...@googlegroups.com] *On >> Behalf Of *Mateusz Dziuba >> *Sent:* Thursday, January 07, 2021 12:21 PM >> *To:* neonixie-l <neoni...@googlegroups.com> >> *Subject:* [neonixie-l] IN-4 ghosting, once again. >> >> >> >> Hi all, >> >> >> >> I am working on nixie clock and experiencing ghosting between neighboring >> tubes. Please see attached photo. >> >> >> >> [image: 1.jpg] >> >> >> >> I am using 6xIN-4 nixies, Arduino with Atmega328, 6xTLP627 transoptor for >> driving anodes and K155ID1 chip for driving cathodes. I am multiplexing >> nixies in interrupt. Code attached. >> >> >> >> What i tried so far: >> >> 1. I connected 10x 1N4148 fast switching diodes from cathodes bonding >> points to mid voltage of 90V. It didn't help a bit and increased power >> consumption only. >> >> 2. I removed the diodes and tried "center-pull" all anodes and cathodes >> bonding points through 500k ohm resistors. Didn't help, although reduced >> decay of anodes after switching off. >> >> >> >> Some photos below: >> >> [image: 4.jpg] >> >> [image: 5.jpg][image: 2.jpg][image: 3.jpg] >> >> >> >> What comes to my mind, I might try to increase/rewrite blanking interval >> but i am not sure how to do it inside interrupt. Maybe I should rewrite it >> to the main loop. >> >> >> >> All help, comments, suggestions are welcome. >> >> -- >> 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/ed921226-078c-4a66-bae2-bf79fad2b9b8n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/ed921226-078c-4a66-bae2-bf79fad2b9b8n%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/17df2739-bad7-490d-97cc-276b524a1da6n%40googlegroups.com.
