Reading David's post from 2012, my understanding is that he built a CMOS nixie clock in 1976, using 4033 chips, and the schematic in the 1974 RCA databook. That databook covers CMOS and Linear chips, not TTL.
So, I think you're chasing a ghost, caused by a slight misunderstanding. On Tuesday, January 7, 2025 at 12:14:04 PM UTC-7 Leroy Jones wrote: > Yes, thank you gentlemen for the responses to my inquiry regarding the > rare and esoteric 74142 decade counter/nixie driver IC. > I have successfully built a fully operational clock using them. It was > not easy nor practical. But it works. This clock uses (17) ICs. > I am seeking the supposed ancient RCA application note which reportedly > describes a clock design that utilizes these 74142 ICs. > The very existence of this app. note is in and of itself somewhat of an > urban legend. Am I chasing a ghost here? > > But many will ask "why bother doing it?"..............To which I answer: > "because it's cool" > > > > > On Tuesday, January 7, 2025 at 11:41:04 AM UTC-5 gregebert wrote: > >> There was a T4142 TTL IC that has a binary counter and nixie driver in >> one device; the Texas Instruments datasheet was published in 1972. Good >> luck finding these devices; I've seen a few for sale online and I'm certain >> very few were manufactured because LED displays quickly killed-off nixies >> around that time. >> >> There is a short thread on neonixie from 2012: >> https://groups.google.com/g/neonixie-l/c/R7K9eJcP8h0 >> >> >> On Monday, January 6, 2025 at 5:00:49 PM UTC-8 J Forbes wrote: >> >>> There's the TI applications for the 74141 driver and 7490/92 counter, >>> but that's probably not what you want. >>> >>> http://selectric.org/nixie/ticlock.gif >>> >>> >>> >>> On Monday, January 6, 2025 at 4:53:36 PM UTC-7 Leroy Jones wrote: >>> >>>> Does anyone here remember ever seeing any application notes about >>>> making a nixie tube clock based around the 74142 counter/driver IC? I >>>> seem to recall a post made many years ago by David Forbes where he >>>> referred >>>> to an old RCA application note about this. >>>> >>>> Any info will be greatly appreciated. >>>> >>>> Chuck >>>> >>> -- 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/563f81e6-d022-4711-82ef-d541ddbc07bbn%40googlegroups.com.
