Not just "A" clock....but a bunch of them. Nice work. I got bit by the Numitron bug last year and made my own one as well with DTF104B tubes. I did a lot of extra circuit design to reduce the surge-current via pre-heating and adding series resistance, and software even checks for a burned-out filament. I was still worried about burning-out filaments, particularly the ones displaying seconds, that I have a button to turn on the clock for a few minutes. The seconds will run for a minute, then shut off.
On Monday, November 11, 2024 at 1:27:19 PM UTC-8 Jeff Walton wrote: > Very nice looking! Clean and simple. I like the wood. > > > > Jeff > > > > > > *From:* [email protected] <[email protected]> *On Behalf > Of *Anders Mikkelsen > *Sent:* Monday, November 11, 2024 3:16 PM > *To:* neonixie-l <[email protected]> > *Subject:* [neonixie-l] Another Numitron clock > > > > I came across some NOS DR-2100 Numitrons a while back, and decided to > design a clock around them, as a delayed Christmas present for family and > friends. > > > > The design is pretty basic, but it gave me a chance to finally make > something which resembles a finished product, using some basic woodworking > with hand tools, and I must say I'm really happy with the result. > > > > I never really fell in love with Numitrons from seeing photos, but a > friend had built a clock with some Russian ones and that was the turning > point for me. Since I acquired enough tubes to make some clocks, I decided > to go with a mass-manufacturable design on a single PCB, in order to > simplify the assembly. > > > > On the firmware side, there was a lot of experimentation with WiFi, NTP, > DST and time zones, but I recently decided to strip it down to bare basics > with manually settable time, as that ended up being the lesser evil > compared to captive portal web configuration and WiFi setup with endless > complications. Often simpler is better, and I'm happy to see that my single > button time setting code is intuitive enough that most people figure it out > on their own. > > > > I'm still a bit on the fence about sharing design files, but I'm > gravitating towards doing so. For now this is just a showcase of my own > project, which might hopefully inspire people to pick up some nice wood and > a hand plane. > > -- > 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, visit > https://groups.google.com/d/msgid/neonixie-l/daf63507-dd7b-421b-8957-a1f2c6376d88n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/daf63507-dd7b-421b-8957-a1f2c6376d88n%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, visit https://groups.google.com/d/msgid/neonixie-l/4673eeea-8d41-4fad-8114-0ff5d09a2472n%40googlegroups.com.
