If you ever do make kits/boards I would also be interested. Thanks
On Wed, Dec 4, 2019 at 8:58 PM Mitch <mitc...@gmail.com> wrote: > Thanks, Richard. Good idea, especially since those tubes are so cheap. > I'll put that on the list, which is getting smaller by the day. The 30v > supply should be able to handle many more tubes. I'm not sure about the > filament supply, though. A second board using an additional HT16K33 will > add up to eight tubes, or seven and colons.Or maybe one board that holds 15 > tubes.With 15 tubes it can also run the Union Square Metronome clock > display. > > The B7971 boards should be here next week. Some software work will be > needed because the tubes are directly driven using HV5530 chips. The > HK16K33 and driver chips are not used because I didn't want to multiplex > them. It is a six digit board, but a two digit add-on can be connected to > the right side to add another colon, and two more tubes. > > > > On Tuesday, December 3, 2019 at 11:17:00 PM UTC-5, Richard Scales wrote: >> >> From the photo I can see that you have mounted the tubes on tube carrier >> boards - great idea for those tubes - so many legs to solder! >> As bill suggested, more tubes would be lovely, could you even make it >> modular? >> 8 or 10 tube versions would be most welcome. >> >> Richard >> >> >> On Wednesday, 4 December 2019 03:53:14 UTC, martin martin wrote: >>> >>> those curvy tubes look great! >>> Where can they be had? >>> >>> On Tuesday, November 26, 2019 at 4:19:55 AM UTC-8, Mitch wrote: >>>> >>>> >>>> >>>> I was a little surprised that the power supplies worked the first time. >>>> A LM2576 is used to drop the supply voltage to 5v. Two 34063 chips raise >>>> that voltage to 32v, and lower it to 1.65v. The datasheet and online >>>> calculators for the 34063s made that part easy. >>>> >>>> The next revision will use separate tube boards. Curiously the tubes I >>>> have with 1990 date codes aren’t very bright. The 1987 versions are good. >>>> >>>> I can’t seem to find matching LEDs for the blue-green color, to use for >>>> colons. Otherwise everything works as it should. >>>> >>>> >>>> >>>> >>>> >>>> [image: IMG-0185.jpg] >>>> >>>> -- > 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/6da0076b-a389-4f61-be25-ab5e5f4d94f2%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/6da0076b-a389-4f61-be25-ab5e5f4d94f2%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/CAKwbPxsEsHsMBUP2OwjWTmgp%3D4w57%2BCohYBHod6Ap9JHvZ9chw%40mail.gmail.com.
