Kevin Lady Heather has a built in software PID Temperature controller. The setpoint to the PID is done using the "TT" command, the feedback is from the Tbolt's temperature sensor and the output is a 1 sec PWM signal that comes out on pin 4 (and others?)
The real problem is to try and find the doc on how to use it all. I'll leave that answer to others. ws ********************* [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! Kevin _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
