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]> 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]. > To post to this group, send email to [email protected]. > 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/CAE%2BVk6Ok6R97ckNzZwEAk%3DEUYsmvQ82zGmseMrDjWHs2u6cSNg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
