Forgot to say that it is a really nice clock! /Martin
On Sunday, 2 May 2021 at 14:09:23 UTC+2 Dekatron42 wrote: > Have you made any experiments with putting them closer to each other so > that the one that is lit always shines on the next one in turn to light up > - this would need an extra tube at the first position connected to the last > tube so that it would trigger at the same time and so that there would be > some glow on the first tube when the last one is lit, or you'll have to put > them in a proper circle so that there is always glow falling on the next > tube in turn. > > /Martin > > On Sunday, 2 May 2021 at 13:59:44 UTC+2 Mike Mitchell wrote: > >> I've built two clocks out of the MTX-90 tubes, following Pieter-Tjerk de >> Boer's schematic. The longest I've gotten one to run is about a week, at >> which point I have to change out tubes. The clock runs fine in the >> daylight but some random tube will stop firing in the dark. I'm thinking >> about sprinkling some blue or green "neon" tubes throughout the clock just >> to provide some extra photons. Something like these: >> https://www.amazon.com/Othmro-Pieces-6x16mm-Bright-Indicator/dp/B07WFNSKSM/ >> I do have some near-UV LEDs (400nm) but the clock is line powered and I >> don't really have space for a buck converter. I hate to drop nearly 300 >> volts across a resistor just to light a string of LEDs. >> >> Does anyone have any other ideas? >> >> Thanks! >> Mike >> >> >> >> On Thursday, December 31, 2020 at 8:21:16 AM UTC-5 Pieter-Tjerk de Boer >> wrote: >> >>> Yes, at first I tried to use them as proper trigger tubes, in multiple >>> ways, but I couldn't find or come up with a circuit that worked reliably >>> over a range of supply voltages (which is also an indication for how robust >>> the circuit is for variations of the tube properties). So I went back to >>> the neon tube counter circuit, and found that to work more robustly, thanks >>> to the very large difference between striking and maintaining voltage of >>> these tubes. Somehow, this seems "wrong", >>> as the trigger electrodes are there precisely to make this kind of >>> circuits easier, but... >>> >>> Regards, >>> Pieter-Tjerk >>> >>> On Thursday, December 31, 2020 at 12:00:07 PM UTC+1 Dekatron42 wrote: >>> >>>> Really nice! >>>> >>>> Thanks for sharing the circuit diagram! >>>> >>>> Did you try to use them as proper trigger tubes and not just as neon >>>> tubes? >>>> >>>> /Martin >>>> >>>> On Thursday, 24 December 2020 at 19:13:10 UTC+1 Pieter-Tjerk de Boer >>>> wrote: >>>> >>>>> >>>>> I recently completed a nixie clock without any transistors, >>>>> microcontrollers or other ICs, instead using trigger tubes to implement >>>>> the >>>>> digital counters: >>>>> https://www.youtube.com/watch?v=E3PBJUcKeoo >>>>> >>>>> Actually, I'm not even using the 'trigger' function of these tubes, >>>>> they are just used as neon lamps with a large difference between strike >>>>> and >>>>> maintaining voltage. It's this difference which allows one to build >>>>> counters with them. I'll publish a more detailed description on my >>>>> website >>>>> later on. >>>>> >>>>> Some may know that I built a similar clock over ten years ago: >>>>> http://pa3fwm.nl/projects/neonclock/ >>>>> That clock used regular NE-2 style neon lamps for the logic; >>>>> unfortunately it became unreliable, as the lamps' properties changed with >>>>> time. I hope the new clock will turn out to be more reliable... >>>>> >>>>> Regards, >>>>> Pieter-Tjerk >>>>> >>>>> -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/0d60eb58-39d9-4c10-b844-dcab69ad5720n%40googlegroups.com.
