I'm not sure I'd recommend the pvelectronics clocks. I know they seem to be quite popular, but they appear to be using the HV5622 out of spec. It's strange to see so many nixie clock designs use these chips out of spec, when there are many other options to do this correctly.
Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/HV5622%20C072313.pdf PV Electronics schematic: http://www.pvelectronics.co.uk/kits/spectrum/spectrum_V5.pdf As you can see in the datasheet, under recommended operating conditions: VDD Logic voltage supply MIN: 10.8V, MAX: 13.2V And in the schematic VDD is shown with 5.2V. There's no good reason to use chips out of spec (they didn't put that MIN 10.8 there for nothing), and it makes the design potentially unreliable. I'm sure it works for many, but that's no guarantee that it won't fail at some point. Or that if you need to replace them one day, and they're using a different process to manufacture these chips, they no longer work at 5V. It's simply poor practice, and unnecessary given the alternatives. -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b4b9ffec-4aff-4a08-9573-5676ecddb386%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
