Your question about the TTL type was discussed between my friend and I. He asked me why I used 74LS instead of 7400. I told him that 74LS00, 74LS90, and 74LS92 is what was on the BOM for the kit. He also thought that a 7400 may work better. I will try that first and see what happens. Will let you know what happens. Thanks for the advise.
On Tuesday, March 7, 2017 at 6:37:54 PM UTC-6, [email protected] wrote: > > I'm hoping that someone out there can help me with a problem that I am > having with a Taylor Edge clock kit that I built. After completing the kit > and plugging it in it seemed to be working fine. Then I noticed that the > 10s second display tube and the 10s minute display tube were not counting > correctly. They would count from 2 to 3 to 4 to 5 but then it would go back > to 3 then 4 then back to 2 and then start the sequence over again. The 1s > second and 10s minute tubes would count fine. I asked a friend of mine that > knows a lot more about this stuff than I do and he recommended that I try > disconnecting resistors R13 and R15 (both 240 ohm) from the time setting > circuit to see what would happen. This fixed the counting problem but now I > cannot set the time. I can't believe that I am the only person that has had > this problem and am hoping someone out there knows the answer. I am > attaching the schematic. > > Thanks > Dave > -- 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/bb975a68-1b1e-465a-a399-08a644c81f17%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
