Joe Analssandrini wrote: However,
tonight, at approximately 8:30 PM EDT, two of my analog models went a
bit "haywire" and reset themselves to Standard Time. We shall see if
they correct themselves later tonight. This has happened on several
occasions previously and I do not understand why.

La Crosse clocks have a firmware bug. When the daylight bit comes
on at UTC 00:00, the clocks are not allowed to reset until local 02:00,
some 7 or more hours later. So they remember it in a bit.

They do this fine (if you have several of the same model, watch them
do it in absolute lockstep).

There's a slight problem at 00:00 UTC the next night (8 PM EDST!)
when they find the daylight bit set but ``it's not 2am yet and there
hasn't been a full day of daylight time yet'' and it says, oops, it ought
to be standard time still, and they all reset back to standard time.

I've never been up to see what time they reset back to correct time
(midnight or 2am, UTC or standard or daylight time, 6 possibilities).

La Crosse, when consulted about this, claimed that the WWVB signal overloads
the clocks when they change times, translation we'd rather not replace
a million clocks on warrantee. But I find it endearing, happening to like
hardware screwups that you can figure out.

It will do the same thing in the fall, by the way. You get 6 time changes
a year with this chipset.

--
Ron Hardin


On the internet, nobody knows you're a jerk.