[time-nuts] Achievable temperature stability for Thunderboltenvironment?

Kevin Rosenberg kevin at rosenberg.net
Mon Jan 17 00:12:40 UTC 2011

On Jan 16, 2011, at 4:46 PM, WarrenS wrote:
> I don't know if this low resolution picture will post correctly.
> If anyone wants a high resolution view of the H/W,
> or an expanded plot showing the results over a 2 week period, 
> I can provide them, if someone will send me the name of a site to post them at.

The photo and schematic were clear, thanks for posting! I see that you have
the fan controlled by pin 4 of the RS-232. Is there a mechanism in Lady Heather
to control pin 4 (DTR) based on temperature readings? Or, maybe you monitor the
temperature and control pin 4 with some other monitor/control program using an
output different that the RS-232 port controlled by Lady Heather?

Anyway, that's a great looking temperature plot, and the implementation is nicely
simple. Lots of bang for that buck!


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