Thank you very much for your proposals but unfortunately none of them really work. I tried to modify my timings as Mr David suggested but it does not get rid of the ghosting. I modified also the 100k resistor and that does not really work either. Any other ideas? Thank you!
marți, 20 mai 2014, 19:01:22 UTC+3, threeneurons a scris: > > Yes, alter your timing, as David suggested. > > But also, those 100K resistors across the bases and emitters, of those > A92s can be made smaller. Say 10K. The junction, will keep the voltage > below 0.7V, so most of the current will still flow thru those junctions. > Those resistors' primary purpose is to bleed off charge once the voltage > drops below that 0.7V junction, and it starts looking like an open circuit. > > Though, Its more likely a timing issue. > > On Tuesday, May 20, 2014 5:43:16 AM UTC-7, Cristinello wrote: >> >> Hello guys, >> I built a relatively simple nixie clock and I am encountering severe >> ghosting issues. To drive the mainboard I used an Arduino ( because I lack >> programming knowledge) . I will attach the schematic and the .ino file from >> the Arduino IDK . The schematic does not contain the nixie board beacuse it >> is a modular design but it is straightforward. I am using 4028 BCD to >> decimal decoder to drive the nixies and the transistors are SMD versions of >> the FMMTA92 and 42. The power supply has also a strange behaviour , when >> left without any consumer , the output voltage is going down wih aprox >> 1Volt/30 seconds. If someone has any idea about what may be wrong I will be >> very very grateful .Thank you in advance! >> > -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/70c37e3f-4cbc-4dbb-8368-9c3d4d8e643a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
