Dan, I need to disagree with you on several counts. It's an .062 board and the vias are small. Plenty of space between D+ & D- and the ground plane, at least 10 mils. It's likely just a 2 layer board, but as someone who spent 25 years of my career designing PCBs, I find very little fault with this layout.
Traces are 6 to 8 mils except for power distribution & HV. The layout is fairly clean and well thought out. The silkscreen is very good and I found no acid traps. Trace to trace clearance looks a bit small on signal lines but it's nothing that can't be manufactured reliably today. The simple architecture is a bonus in my opinion. He used copper pours a bit inconsistently but it's not a crime on this tiny board. Overall it's a competent design and quite a bargain. If the code was open source I'd certainly change a few things with regard to setting time and button operation, cathode poising routine, etc. But for this price it's a great little clock and a nice gift item. On Monday, December 12, 2022 at 11:58:27 PM UTC-6 [email protected] wrote: > It looks pretty basic. It uses a STM8 microcontroller with a ds3231 RTC, > an old school method of implementing a 40 bit shift register made up the > old school way (32 bits for digits, 2 extra for the colon and a few > flapping in the breeze), the usb port is only there to supply power. D+ and > D- (and ID) are *really* close to the ground plane if not outright shorted > to it. The buttons are on the same board as high voltage with lots of > ground plainy goodness to make sure any shorts count. No idea how thick the > PCB is, though they are using a larger via size, so it’s probably a thin > board, or the designer got lucky… > > I’d say it’s a perfect example of what not to buy. > > -Dan > > On Dec 12, 2022, at 8:15 PM, Terry S <[email protected]> wrote: > > https://www.ebay.com/itm/314168311777 > > Many sellers on ebay. > > Does it come with pins for the tubes? > > Terry > > -- > 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/66e50f8a-47f8-48da-b3ef-585cb767bd39n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/66e50f8a-47f8-48da-b3ef-585cb767bd39n%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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/fd018422-8285-43a7-be8d-e748bc0b2a52n%40googlegroups.com.
