Interesting. Can you take some pictures of the problem? And maybe provide the schematic? (at least of the part driving the nixies).
On Monday, February 23, 2015 at 1:15:08 PM UTC+1, joenixie wrote: > > Hi Yall, > > Thanks for the inputs, Sadly direct drive is not an option, I just don't > have the I/O pins available nor the space to add the chips needed to > 'produce' more. > > Terry, > > By other pin, I mean the side considered the anode side of the neon bulb. > The side that is positive when the bulb should be lit. It will have a dim > but visible glow around the tip of it. This goes away when the bulb is lit. > > I will try the biasing. would biasing both sides help? This would be sort > of like terminating the lines. > > -joe > > On Sun, Feb 22, 2015 at 8:12 PM, 'Terry S' via neonixie-l < > [email protected] <javascript:>> wrote: > >> Joe, what do you mean by "other pin"? >> >> Terry >> >> On Sunday, February 22, 2015 at 10:17:23 AM UTC-6, joenixie wrote: >> >>> Hi Yall, >>> >>> I am working on a multiplexed display and am finding that for the lines >>> that have both of their transistors turned off, there are massive swings of >>> voltage that are induced on the lines. The levels are so high I get other >>> digits flickering in the tube and I also have neon bulbs that are attached >>> get lit up. >>> >>> I've read several things about this being due to timing, but this is not >>> the case (at least for the neon bulbs) I know this because the 'other pin', >>> the pin that should not light up, is the pin that gets lit up. >>> >>> I had an engineer tell me that ground plains will help isolate these to >>> some degree, are there any other ideas? I am using MPSA42 and MPSA92 >>> transistors for driving the tubes and lamps. >>> >>> Any ideas will be appreciated. >>> >>> -joe >>> >>> >>> -- >> 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] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/66a56df9-5571-4bfc-a5a8-8f0801a2d978%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/66a56df9-5571-4bfc-a5a8-8f0801a2d978%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- 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/7fb6d65e-bd42-401a-929b-20023e9df587%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
