[time-nuts] [Solved] Looking for multiple PPS timestamp logging
kevin at rosenberg.net
Wed Oct 5 20:02:58 UTC 2011
On Oct 4, 2011, at 11:42 AM, Mark Sims wrote:
> Use an LM34 sensor, not the LM35. It has twice the resolution per volt since it outputs in degrees F, not degrees C.
That's a good idea. That's one issue that I have with a 10-bit ADC common to many MCUs, is the
low voltage of 0.20 to 0.28 mV in the office.
> Better yet, use the DS1620 (old revision) that is used on the Tbolt. It has a digital interface. It will give you around 0.01C res without any ADC conversion noise, etc.
That's a good idea. In fact, I saw that I have some DS1631 samples on the shelf.
I like that idea as that can be bit-banged by a simple, small MCU on same
board as the XO.
Thanks for the thoughts, Mark!
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