Monochron timebase

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DMerriman
 
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Joined: Sun Feb 15, 2009 3:30 pm

Monochron timebase

Post by DMerriman »

Looking at the schematic, I'm not seeing a timebase other than the RTC. I can't help thinking that the clock accuracy is going to suffer unless there's some real good temperature stabilization happening somewhere. I think it would be better to have an AC input from a wallwart (say, something like from an old modem - roughly 9VAC), and pull the 60Hz off of that; it has truly wonderful long-term stability and accuracy. Then, if power is lost, switch over to the less accurate RTC for the (hopefully) short period of time needed to get mains power back.

adafruit
 
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Re: Monochron timebase

Post by adafruit »

The wall adapter is DC not AC (so that it works in 220V or 120V countries)
you can fit a TCXO such as the ChronoDot from macetech, theres space for it!

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