My designs, which use an AC wall-wart for timekeeping (backed up by a DS1302 for power outages) all ran fast until I put in code to ignore all transitions for 16.5 mSec after seeing one (a full AC cycle is 16.67 mSec, at least in the US). This seemed to completely cure my running fast problem. Until I did this, the clock would run as much as 10 minutes per hour fast, due to the noisy line.
On Wednesday, September 5, 2018 at 11:47:21 AM UTC-7, [email protected] wrote: > > (my clocks based on MM5531x chips, TTL logic, and CMOS logic all ran > slightly fast and I blame that on counting excess noise pulses). > -- 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/d48eba40-f82a-4a68-811b-d770c2946b3d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
