Read through the comments at the start of the file heather.cpp
There is an option for Heather to control the temperature of the Tbolt. This
is most easily done by enclosing it in a box and using a small fan to pump
ambient air into the box. Heather has a nice PID controller (that Warren
Sarkison developed and I wrote) that pulse width modulates the fan (using the
serial port modem control signals). I get millidegree temperature stability if
the air conditioning is not running, and around 20 millidegrees with it
running. Long term average temperature can be in the micro-degree area...
Your control temperature should be somewhere between max ambient temperature,
and max self-heating temperature in the box. You do have to play around a bit
with the fan position, baffling, and thermal mass in the box to get the best
performance. There is a K A keyboard command to (somewhat) auto-tune the PID
control parameters.
---------------------------------------
-If so, what does the Lady Heather "t t" command do? It prompts you to "enter
desired operating temperature". What could it control?
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