A crystal would be >100x times more accurate than the resonator, keeping time to within a quarter of an hour over a year. For home automation tasks that's pretty much good enough. After a year my UNO would be out of whack by more than a day.
The accuracy of the resonator is poor (>0.5%), meaning the UNO cannot be used for any kind of timekeeping
A crystal would be >100x times more accurate than the resonator
Me, I avoided buying a Uno on first release [...] and so far have had no reason to purchase one
If long term time accuracy is an important part of a specific applications, then it deserves a proper solution, like a RTC.
Do you have any data to back this up?!?! I'd love to show this in some of the work I am doing.
Strange, my Uno (purchased 3 weeks ago from Farnell in the UK) does use a crystal.
One part with three pads is significantly simpler than three parts each with two pads.It seems to me that there aren't that many applications that are going to run for long enough for +/- 0.25% to be a problem but not long enough for the crystal's error to be a problem. That's what RTC modules are for, after all.I, of course, am simply guessing.They do sell a lot of boards though, if they can save $0.50 per board that adds up over the course of 10,000 boards.
The board rev number should be printed somewhere on it.
I wonder if I can use their boot loader on a Duemilanove.
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