That is looking awesome. Happy to wait until you are ready - especially if you are going for 15 or 16 digits. Is that a two tube add-on board in the bottom of the picture?
On Friday, 13 December 2019 15:45:47 UTC, Mitch wrote: > > Richard, kits will be available soon after January 1st. Everything but the > tubes, case, and power supply will be included. For anyone who can't wait, > I can supply the main board, six tube boards, programmed microcontroller, > and two pushbuttons, for $50 plus shipping. Everything else is available > from the usual suppliers. The assembly manual is rough at this point, but > it should be sufficient while I improve it. > > After that, the B7971, then I'll look at a 16 digit version, or maybe 15 > digits with some colons.It should be easy, just another HT16K33, some extra > driver chips, and a higher current capable power supply for the filaments. > > > > On Friday, December 13, 2019 at 9:56:44 AM UTC-5, Richard Scales wrote: >> >> That does look good - I need this in my life! Do you currently have plans >> for something with more than six tubes? >> >> On Tuesday, 26 November 2019 12:19:55 UTC, 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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/11c5e848-3fb2-43ae-9aa2-77e0a552b5be%40googlegroups.com.
