Thanks to everyone who took the time to reply. I've got some great information, and may be back with more questions. I've also got a back-up plan if I'm not successful - a UPS!
Best regards, Jim On Wednesday, September 5, 2018 at 8:50:55 AM UTC-6, Jim KO5V wrote: > > Hi everyone, > > I have several nixie clocks, including two clocks that I built about 12 > years ago that use the mains frequency for timing. I live in a semi-rural > area, and during this time of year, I lose power quite frequently due to > lightning strikes. This can be just a "blip", or it may last several hours. > Either way, I have to reset each clock. Both clocks run off of 9VAC > wall-warts. > > All I want to do is to keep the logic alive during an outage. My guess is > that this is more than just adding in a circuit with a battery - a > frequency source may also be needed. Looking at the schematic for the kit, > the 9VAC is split - one branch goes to a pin on the processor, and the > other to the rectifier and 5V regulator. I'm thinking there might be a way > to use some kind of an or-gate to select either the wall-wart, or the "keep > alive" circuit. Here is an example of where my lack of electronics > experience really shows, but I can build from and sometimes even understand > a schematic. > > So, if anybody has ideas or experience, please let me know. I've looked at > several circuits on the web, and have a vague idea of what can be done. > > Any suggestions will be greatly appreciated! Thanks in advance, > > Jim > -- 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/32aec820-0a83-45a3-87e4-ffa9e45f7446%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
