Oh, yes, its a timing issue. It works fine with the guides detached. Its just more of a curiosity. Flipping the guide pins does make it switch to K1. I'll have to analyze my circuit timing more closely to discover the actual mechanism details. The reset is issued at the same time as the flip. Ideally this means its at a main cathode, and the guides should be off. But this is a simplistic circuit, where the prior "main" state, now becomes the new "G1" state. To fix it, here, would add complication. If someone wanted to use the pendulum circuit, with the reset on the second dekatron, its just simpler to rotate the tube such that K9 is on top. Its quite consistent.
In a microcontroller circuit, its a non-issue. To have the glow rest at a "main" cathode, the guides need to be off. So, you just turn both bits off, then issue your reset pulse. Also if its used in a microcontroller circuit, Cr is omitted. Recommended minimum pulse duration is 100uS. The reset can be used instead of monitoring the glow position, and waiting for the glow to be at K0 (NDX). On Tuesday, August 16, 2016 at 3:05:29 PM UTC-7, Dekatron42 wrote: > > Nice! > > Could it be that you have a timing issue with the guides not being totally > "off" when you do the reset? > > Or that the reset does not load the cathode enough so that the glow steps > to a lower potential, being K9? You can also check what happens if you > exchange the guides, then it should step to 1 instead of 9 - unfortunately > not telling you what the problem is but it should at least be another way > of measuring what's happening. One more thing to try is to add a resistor > in the RTN +55V power line as that then changes the balance between K0 and > the other guides. > > /Martin > -- 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/363edb00-3b07-4248-8d6b-37443f46a2ef%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
