Well, maybe you'll just have to design it from scratch yourself. :-) The jury is still out though whether the Numitorns can be driven from a regular TTL (or LSTTL) output. One opinion is that they can, as long as there is a diode in series with the Common, to lower the voltage on the filaments a bit. Another concern is the inrush current when a cold filament is lit up, jeopardizing the output driver of the IC - but based on some accounts, it is not a real problem.
On Saturday, April 25, 2026 at 9:32:18 AM UTC-7 Instrument Resources of America wrote: > Just a wild guess on my part, due to the topic, and the year, but could it > have been a Pop Tronics (Popular Electronics) article? > > Ira > > > > On 4/25/2026 6:07 AM, Mitch wrote: > > Around 1973 I build a clock from what I think was a magazine article. I've > been looking for that article for years. I've searched archives with no > luck. Here is the description: > > The clock was point to point wired on two stacked pieces of breadboard, > around five inches square each. It included two incandescent seven segment > displays on the top board, and was built with 7400 series ICs. It flashed > hours, minutes, and seconds. > > Does anyone remember this project? I may have asked this question years > ago. Thanks in advance. Mitch > > -- > 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/ba633cd5-7f1e-4877-83a3-541112213122n%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/ba633cd5-7f1e-4877-83a3-541112213122n%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/910bfd3c-6e0c-47ee-8957-9ddde1747673n%40googlegroups.com.
