NICE! You will find this very useful for testing and characterizing nixie tubes.
For my more-valuable tubes (RZ568m and b7971), I collect current-voltage data for each numeral (or segment) and plot on a graph. From there, I can see if there is consistency across tubes, which is an indicator of quality. Anything inconsistent is an indication of a quality issue, or possibly end-of-life. On Saturday, August 19, 2023 at 5:23:42 AM UTC-7 Benoit Tourret wrote: > Thanks for your help, > I finished my HV power supply... > [image: 20230819_125349.jpg] > > From right to left, top to bottom: > > Voltage Output of the DC-DC converter > Ajustment of the DC-DC output > Input 8-32V (Usually Set on 12V) > > AMeter Output > 50K Adj. + 4.7k Resistor (2w each) > > Voltage Output to the tubes > output (up to 300V DC) > > So far, all is working just fine, tested up to 250V. > I may add a shunt or a change the AMeter if needed. > > Regards, > > Benoit. > Le mardi 2 mai 2023 à 23:17:56 UTC+2, gregebert a écrit : > >> I've used a few different flavors of these cheap digital meters >> (0-500VDC, 120VAC, 300VDC) and have not had any problems....yet. Most of >> them are self-powered, which is handy because it doesn't require a separate >> power supply, though risky because they do create a potential source for a >> short. Everything I build has fuses, so even if one of these things >> shorted-out, it would just blow a fuse. All but one of them are in metal >> cases, so if they caught fire, it would be contained. >> >> The most dangerous line-powered items I know of are LED bulbs; even worse >> than CFLs due to their construction. I've replaced several on the verge of >> failing, or already failed, that have obvious signs of overheating or will >> actually still hot in the socket. Hmmmm....now I gotta go burn one to see >> if the plastic is self-extinguishing. I'm pretty sure those cheap meters >> will burn on their own once ignited, but I'm not sure I want to destroy one >> in the name of science.....unless I can find a *really* cheap one. >> >> On Tuesday, May 2, 2023 at 11:54:36 AM UTC-7 Benoit Tourret wrote: >> >>> I am a bit afraid of all those inexpensive displays made in PRC, the >>> seller often doesn't know what he is selling, the specs are wrong or >>> trunked, and I don't know their behavior with 300V DC or more... >>> >>> Well, I ran a few of my IN-1, I had to run a couple of them at 4mA 180V >>> and the black marks disappears completely after 4h. I can reduce to 150V >>> 2mA and still have a good glow. >>> those tubes are very nice with the "normal" 5, much better than the >>> IN-4. >>> should be nice on a 6 digit clock with a decatron for tenths of a second. >>> >>> Le mercredi 26 avril 2023 à 00:37:49 UTC+2, gregebert a écrit : >>> >>>> Looks good. I've gotten very fond of the inexpensive digital meters on >>>> Ebay and started putting them in many of my projects. >>>> >>>> On Tuesday, April 25, 2023 at 10:16:21 AM UTC-7 Benoit Tourret wrote: >>>> >>>>> [image: 20230425_170205.jpg] >>>>> Here is the first try for my testing devices. >>>>> My HT power device, with the voltage regulated with the rheostat. next >>>>> step will be the rheostat for the output power and placing the voltmeter >>>>> after the limitation resistors and an on/off switch. >>>>> The box is just to have an idea of the size. may be I will print >>>>> something or find a more accurate box... ;-) >>>>> I will add a 5V USB power supply >>>>> >>>>> on the left an arduino uno with a hat and a zif for testing K155id1 >>>>> with a 12 pin SIL connector for a nixie tube, here a support for IN-1. >>>>> I made one for IN-12, I am making one for IN-2 and one other for IN-4. >>>>> >>>>> on top of the box, a 12 position manual switch. I will use a >>>>> Protoboard for better contacts. >>>>> >>>>> Le samedi 22 avril 2023 à 22:31:34 UTC+2, Benoit Tourret a écrit : >>>>> >>>>>> Thanks Terry. >>>>>> >>>>>> this also will help me a lot. >>>>>> My electronic courses are too far to be clear in my mind... >>>>>> >>>>>> When I read gregebert's thread, I wanted to write the complete >>>>>> equation to calculate the resistor for a wanted current. but the result >>>>>> was >>>>>> the opposite of the reality... >>>>>> so I decided to use a potentiometer and a galva... >>>>>> but you gave me the result !!! >>>>>> Le samedi 22 avril 2023 à 22:13:14 UTC+2, Mac Doktor a écrit : >>>>>> >>>>>>> Reading this thread has begun to make my eyes glaze over. I find the >>>>>>> following diagram to be helpful for understanding some of what's going >>>>>>> on. >>>>>>> Perhaps it will add some clarity to the discussion. This in from Marcin >>>>>>> Saj's github and specifically concerns his PRO Nixie Tester: >>>>>>> >>>>>>> [image: pro-nixie-tester-how-to-use-02.jpg] >>>>>>> It took a while for me to completely understand how all of this >>>>>>> works and this diagram was a huge help. I doubt that I would have >>>>>>> worked it >>>>>>> clearly otherwise. For the record I haven't gotten around to reading >>>>>>> the JB >>>>>>> Dance book—yet. >>>>>>> >>>>>>> Full info here: >>>>>>> >>>>>>> https://github.com/marcinsaj/Universal-PRO-Nixie-Tester-and-Healer >>>>>>> >>>>>>> >>>>>>> Right now I'm using the PRO Nixie Tester with three DMMs but I've >>>>>>> purchased some DPMs for a compact, dedicated meter bridge. Someday I'll >>>>>>> get >>>>>>> around to making a panel and wiring them up. And rigging up isolated >>>>>>> power >>>>>>> supplies for them. >>>>>>> >>>>>>> >>>>>>> On Apr 22, 2023, at 1:50 PM, Moses <mo...@neonixie.com> wrote: >>>>>>> >>>>>>> That yh11068a module is rated for 40 watts! That is like 10 times >>>>>>> what you would need for most nixie clocks! Be careful at higher >>>>>>> voltages, a >>>>>>> 200mA capable supply at a few hundred volts will hurt you good. >>>>>>> >>>>>>> >>>>>>> Zaparooney. x_x >>>>>>> >>>>>>> >>>>>>> Terry Bowman, KA4HJH >>>>>>> "The Mac Doctor" >>>>>>> >>>>>>> https://www.astarcloseup.com >>>>>>> >>>>>>> "If only you could see what I've seen with your eyes."—Roy Batty, >>>>>>> *Blade >>>>>>> Runner* >>>>>>> >>>>>>> -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/30bd6772-b217-412c-ad77-082ed046d2ben%40googlegroups.com.
