Direct-drive. I never considered multiplexing them, though it might be possible due to phosphor persistence. Now that I've powered-up 4 tubes and gathered more data, I'm seeing tube-to-tube differences in brightness which is not only visible, but also measurable via anode current. That could complicate multiplexing.
On Sunday, September 25, 2022 at 1:35:50 PM UTC-7 Dekatron42 wrote: > Does your design run them multiplexed or direct drive? > > /Martin > > On Saturday, 24 September 2022 at 08:28:31 UTC+2 gregebert wrote: > >> It's not a dollars-and-cents answer. I've spent hundreds of hours, and a >> fair amount of money on the research, design, debug and development to get >> this very complex design working. At a future date, there will be a limited >> number of tubes made available for sale by the co-sponsor of this project >> and I will be making the design available for others to download (free of >> course) once it's been proven to be stable and reliable with 6 tubes. I >> will forewarn that the board has some challenging SMT parts, and requires >> the FPGA to be programmed. It's just unfortunate that NIMO tubes are so >> rare. >> >> On Friday, September 23, 2022 at 11:06:50 PM UTC-7 tntm...@gmail.com >> wrote: >> >>> How much did all this cost you? O.o >>> >>> On Sat, Sep 24, 2022, 2:05 AM gregebert <greg...@hotmail.com> wrote: >>> >>>> Well, it's been a long haul since this project started in 2017, and >>>> today was a major milestone with the arrival of 3 more tubes. They are >>>> re-joining their sibling after 5 years. >>>> >>>> [image: IMG_0421.JPG] >>>> >>>> Filament data was gathered and verified to be consistent with the first >>>> tube. so tomorrow I can begin powering-up each one individually and gather >>>> more data before I dare take a chance and plug all of them into the clock. >>>> Besides, 3 more just landed at the airport and are waiting to be delivered. >>>> >>>> More details to follow in the coming week, or weeks (plural) if there >>>> are problems. >>>> >>>> [image: image.png] >>>> >>>> -- >>>> 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+...@googlegroups.com. >>>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/6bca9c12-017e-4844-8ee3-91845bafac4bn%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/neonixie-l/6bca9c12-017e-4844-8ee3-91845bafac4bn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- 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/ec4d84d9-3082-4520-94ef-5c0fceaadb5bn%40googlegroups.com.
