Never heard about acid traps... isolated copper islands, acute angles... very interesting...
Terry S schrieb am Freitag, 23. Dezember 2022 um 21:30:21 UTC+1: > 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 d...@schnur.org 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 <tschw...@gmail.com> 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 neonixie-l+...@googlegroups.com. >> 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/5f3d02fc-e2fd-4c19-b26f-1ca463319b13n%40googlegroups.com.
