AVR-Chat

> My sign has an RS485 link to the manager's PC inside the building where
> he can correct the time. It uses a Philips PCF8583 real time clock and
> hardly ever needs correcting. It does daylight saving adjustments
> automatically (add 1 hour at 1am on last Sunday in March, back 1 hour at
> 2am on last Sunday in October). However if I was doing it now I would
> include a GPS time module as others have suggested. But I'm not sure how
> fixed your daylight saving times are - I was in Oz during April and they
> changed end of daylight saving by a week to allow the Commonwealth Games
> to occur in summer time. Not sure GPS would help with that.

Apparently, GPS time also doesn't deal with leap seconds, and that GPS
time is currently 19 seconds off of UTC due to this.

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/