Sign me up for an 8 digit Mitch!  Really really neat!  So is it just two
8's put together to make 16?

Bill


On Sat, Jan 25, 2020, 12:05 PM Mitch <mitc...@gmail.com> wrote:

> This is the finished, 8 digit version. I like it this way better because
> there are no color match issues as there were with LED colons, and two
> extra tubes are available for words. And tubes are cheap.
>
> The same firmware now handles 6-16 tubes, 2 HT16K33 chips or 4 HV5530
> chips, colons as LEDs or colons as tube segments, and APA102 or APA106 RGB
> LEDs.
>
> And no jumpers, no cut traces! Hours of soldering here with 560 solder
> joints just for the tubes and headers, and lots of SMD on the bottom of the
> board.
>
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