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On Friday, 7 September 2012 15:39:02 UTC+1, Ron Schuster wrote: > > I've built a 4-digit IN-17 nixie clock based on a 1x4 mux design. It uses > 4 neon lamps, 2 for the colon, 1 for the PM indicator and 1 for the Alarm > On indicator. I have a small problem where I see a dim flicker in the lamps > that are supposed to be off. They are driven as part of the nixie > multiplexing circuit. One side of each lamp is tied to one of the digit > anode drivers. The other sides are tied together and pulled to ground > through one common MPSA42 "cathode" driver. I think I have sufficient > blanking time between the digits. Each digit is on for 1 ms and the > blanking time between digits is 100 uSec. The nixies are showing no > ghosting at all. Any help in figuring out why my lamps are not turning > fully off would be greatly appreciated. Schematics are attached. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/aJ48G7a5N18J. For more options, visit https://groups.google.com/groups/opt_out.
