This does pretty much do the trick, so that point is proven. I just don't feel happy with the solution knowing the tube doesn't perform as good as the other tubes, so still decided to replace it :-).
Michel On Sep 12, 7:22 am, Michel <[email protected]> wrote: > Hi Marcin, > > That is exactly right, the blue backlight LEDs can indeed be used for > this purpose. They do already come on if the tube doesn't ionize but > the LED current in low ambient light is very low so there's not many > photons emitted. I changed my code a bit yesterday so that I can > inject a variable boost current for the initial 160us, 320us, 640us or > 1280us. I am trialing this at the moment and so far the results are > really good. > > Michel > > On Sep 12, 6:40 am, marcin <[email protected]> wrote: > > > > > > > > > It is necessary to somehow ionize the gas a bit. Light is good, radiation > > is. Some people - eg. this guyhttp://eeberfest.net/gallery.php?set=thebox > > use UV LEDs to ensure ionization in dark conditions. Maybe it would be > > possible to somehow use your blue LEDs? I have no idea if they would be > > sufficient and how much time they would need to sufficiently ionize the > > gas. Just an idea. > > Marcin > > > On Tuesday, 11 September 2012 12:52:20 UTC+2, Michel wrote: > > > > I did some extensive testing today and made the conclusion that these > > > slow tubes need much more ambient light to ionize than other tubes. > > > Raising the anode voltage to 200V rather than 170/180 is not doing > > > much at all, I only see a dramatic improvement when I expose them to > > > more ambient light. Could that be related to the amount of mercury > > > vapor then? Is it then just a badly manufactured tube or is that due > > > to its age? > > > > Michel > > > > On Sep 5, 8:30 am, marta_kson <[email protected]> wrote: > > > > Just a thought as the off-time before the problem reappears seems to > > > > be very long, may the mercury in the tube be involved in some way? > > > > That would take minutes to condense. The loss of ionization is a > > > > microsecond process, so the explanation must be something else. The > > > > mercury insertion is also something that could had some process > > > > variations at the manufacture making some tubes worser than other even > > > > in the same batch. -- 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]. For more options, visit https://groups.google.com/groups/opt_out.
